2304-9782, 2618-8686, 2405-7223
St. Petersburg Polytechnic University Journal: Physics and Mathematics
17
3.2
2024
1-373
CNF
RUS
10-13
0000-0002-6919-5681
Osmanov
Sebastyan
0000-0002-1233-0109
Mikhailova
Tatiana
Hybrid state of Fabry–Perot and Tamm plasmon-polariton modes in structures with different plasmon layers
The paper presents the investigation of magnetophotonic crystals with different metal layers for the formation of a Tamm plasmon polariton. It was revealed that the structure with the Ag layer has the resonance with a higher optical quality factor. It is shown how a change in the symmetry of the structure affects the properties of the hybrid state of Fabry–Perot and Tamm plasmon polariton modes. The effect of oblique incidence and polarization of incident light on the localization of light in the layers of the structure is demonstrated.
10.18721/JPM.173.201
537.9
Tamm plasmon polariton
magnetophotonic crystals
magneto-optics
https://physmath.spbstu.ru/article/2024.76.1/
CNF
RUS
14-19
0000-0003-2498-1192
I.N. Ulyanov Chuvashia State University
Lepaev
Alexander
Cheboksary, Russian Federation
0000-0002-9723-5652
I.N. Ulyanov Chuvashia State University
Ksenofontov
Sergey
Cheboksary, Russian Federation
0000-0001-8432-5635
I.N. Ulyanov Chuvashia State University
Vasilyeva
Olga
Cheboksary, Russian Federation
Chuvash State Pedagogical University named after I.Y. Yakovlev
Tashkova
Ksenia
ksuha-92@inbox.ru
Cheboksary, Russian Federation
Chemical activity of dispersed particles of potassium compounds in a pyrotechnic flame
Modern developments of aerosol-generating compounds are associated with increased fire extinguishing efficiency and decreased temperature and chemical activity of twophase combustion product flow. When burning these compounds in special generators, it is important to release particles as small as possible into the environment. The concentration of these particles must be commensurate with the concentration of active flame particles in the combustible material being extinguished. The structure of particles in pyrotechnic flames has been studied and the possibility of producing particles with reduced corrosion resistance has been demonstrated. A mechanism for the interaction between reacting particles and potassium iodide crystals has also been proposed.
10.18721/JPM.173.202
536.46
flame
dispersed particle
potassium oxide
potassium iodide
https://physmath.spbstu.ru/article/2024.76.2/
CNF
RUS
20-24
Voronezh State University of Engineering Technology
Kim
Kseniya
kmkseniya@yandex.ru
Voronezh, Russian Federation
0009-0005-4323-9163
Chernenko
Sergey
sergey.x173@mail.ru
Voronezh State University of Engineering Technology
Niftaliev
Sabukhi
sabukhi@gmail.com
Voronezh, Russian Federation
Voronezh State University of Engineering Technology
Kotov
Gennady
giktv@mail.ru
Voronezh, Russian Federation
Voronezh State University
Zolotukhin
Dmitriy
zolotuhin@phys.vsu.ru
Voronezh, Russian Federation
Chukavin
Andrey
andrey_chukawin@mail.ru
Voronezh State University of Engineering Technology
Lenshin
Alexander
lenshinas@mail.ru
Voronezh, Russian Federation
Deposition of tin and gold on porous silicon by vacuum thermal spraying
In this work, a tin-gold layer was deposited on porous silicon (KEF 100) substrates by vacuum-thermal process (VUP) to improve the performance of sensors. By the method of X-ray photoelectron spectroscopy (XPS) we analyzed the surface of the materials of the original porous silicon, as well as porous silicon with tin and gold, according to the method [1]). XPS overview spectra allow identifying elements present on the sample surface, as well as determining their oxidation state and concentration. Using this information, valuable data on the surface composition can be obtained and the chemical structure of the sample can be analyzed. The results obtained showed that using the vacuum-thermal method can be successfully applied to obtain nanocomposites of porous silicon with tin and gold. The obtained nanocomposites contain phases of tin dioxide, tin suboxide/monoxide and metallic tin. Compared to tin, the gold film is formed in a smoother, more uniform manner. XPS spectra show that the gold is metallic, free of impurities and oxides.
10.18721/JPM.173.203
546.3-126:544.2
porous silicon
composites
tin
gold
thin films
https://physmath.spbstu.ru/article/2024.76.3/
CNF
RUS
25-30
Goroshko
Dmitrii
goroshko@iacp.dvo.ru
0000-0001-5386-1013
Institute of Automation and Control Processes, Far Eastern Branch of the RAS
Galkin
Konstantin
galkinkn@iacp.dvo.ru
0000-0002-8726-9832
Institute of Automation and Control Processes, Far Eastern Branch of the RAS
Chernev
Igor
igor_chernev7@mail.ru
Maslov
Andrei
maslov@iacp.dvo.ru
0000-0003-4300-0070
Kropachev
Oleg
chernobez@gmail.com
Subbotin
Evgenii
jons712@mail.ru
0009-0008-2152-140x
Goroshko
Olga
olgagoroshko@iacp.dvo.ru
0000-0003-4127-2988
Institute of Automation and Control Processes, Far Eastern Branch of the RAS
Galkin
Nikolay
galkin@iacp.dvo.ru
CoSi ultrathin films on Si(111) substrate: comparison of the stage formation in ultra-high vacuum and during annealing in argon
As a result of the study, optimal conditions were identified for the formation of ultrathin films of cobalt monosilicide (CoSi) on a silicon substrate during a single annealing (T = 500–600 °C) of chromium layers (2–10 nm), both under ultra-high vacuum conditions and in an argon environment during isochronous annealing. The formation of the phase composition in ultrathin CoSi films is uniquely controlled in situ during growth in ultrahigh vacuum by the appearance of a bulk plasma frequency peak at 20.2–20.3 eV in the EELS spectrum, a Raman peak at 198 (204) cm-1 in ex situ Raman studies of the annealing in an argon environment (in vacuum) and characteristic of CoSi optical functions of refractive index and extinction and optical phonons at 223.7, 302.5 and 418.6 cm-1. It has been established that cobalt films not subjected to thermal annealing in a vacuum begin to oxidize when annealed in an argon environment, which is convenient to monitor by the appearance of Raman peaks at 187 cm-1 and 670-677 cm-1.
10.18721/JPM.173.204
539.23+535.39+537.32+537.622
cobalt layer
cobalt monosilicide
ultrathin films
isochronous annealing
ultrahigh vacuum
argon environment
electronic structure
phonon structure
optical properties
https://physmath.spbstu.ru/article/2024.76.4/
CNF
RUS
31-35
Subbotin
Evgenii
jons712@mail.ru
Kozlov
Aleksei
kozlov.ag@dvfu.ru
Goroshko
Dmitrii
goroshko@iacp.dvo.ru
0000-0002-8726-9832
Institute of Automation and Control Processes, Far Eastern Branch of the RAS
Chernev
Igor
igor_chernev7@mail.ru
0009-0007-4827-2653
Khoroshilov
Dmitry
0009-0007-5206-5753
Lisenkov
Oleg
0000-0001-6878-679X
Zhizhchenko
Alexey
0000-0003-3377-1912
Kitan'
Sergei
0000-0003-4127-2988
Institute of Automation and Control Processes, Far Eastern Branch of the RAS
Galkin
Nikolay
galkin@iacp.dvo.ru
Mg2Si synthesis on silicon crystals with different aspect ratio
In the paper synthesis of magnesium silicide (Mg2Si) features on silicon crystal with different aspect ratio were observed. These crystals were etched from monocrystalline borondoped silicon wafers with (100) orientation by metal-assisted chemical etching. The synthesis was occurred in ultra-high vacuum condition by a solid phase epitaxy and the modified reactive epitaxy with ultrafast Mg deposition. The substrate temperature range in both methods was 340–390 °C. As result co-axial core-shell Si/Mg2Si heterostructures with magnesium silicide thickness 500–1200 nm were produced.
10.18721/JPM.173.205
539.23+539.25+537.32+537.9
silicon
magnesium silicide
Mg2Si
epitaxy
metal-assisted chemical etching
MACE
Raman
SEM
https://physmath.spbstu.ru/article/2024.76.5/
CNF
RUS
36-41
Kadinskaya
Svetlana
skadinskaya@bk.ru
0000-0002-3469-5897
Alferov University
Kondratev
Valeriy
kvm_96@mail.ru
St. Petersburg, Russian Federation
0009-0008-4344-4863
Alferov University
Nikolaeva
Aleksandra
St. Petersburg, Russian Federation
St.Petersburg State University of Film and Television
Akopyan
Irina
irina-akopyan@yandex.ru
St. Petersburg, Russian Federation
St. Petersburg State University
Serov
Alexey
a.serov@spbu.ru
St. Petersburg, Russian Federation
St.Petersburg State University
Labzovskaya
Mariana
St. Petersburg, Russian Federation
0000-0002-3705-9706
St.Petersburg State University of Film and Television
Mikushev
Sergey
St. Petersburg, Russian Federation
St.Petersburg State University
Novikov
Boris
bono1933@mail.ru
St. Petersburg, Russian Federation
St. Petersburg State University
Shtrom
Igor
i.shtrom@spbu.ru
St. Petersburg, Russian Federation
0000-0001-7223-7232
Moscow Institute of Physics and Technology (National Research University)
Bolshakov
Alexey
acr1235@mail.ru
Moscow, Russian Federation
Random lasing in hydrothermal ZnO structures
In this manuscript, we present a study on the optical properties of ZnO nanowires synthesized via hydrothermal method. The nanowires were characterized by low temperature photoluminescence spectroscopy, revealing resonant modes indicative of random lasing behavior provided with scattering by misoriented nanowires. The spectral position of the resonant modes suggests lasing in the region of the P band of exciton-exciton interaction. Our results also indicate a correlation between the surface density of the nanostructures and peak intensity of the emission. Overall, our findings demonstrate the potential of hydrothermal synthesis for fabricating efficient light-emitting devices based on ZnO.
10.18721/JPM.173.206
535.015
zinc oxide
hydrothermal
photoluminescence
https://physmath.spbstu.ru/article/2024.76.6/
CNF
RUS
42-45
Filippov
Ivan
ivn.filippov@gmail.com
0000-0002-0358-7818
Yakushova
Nadezhda
0000-0001-8318-8149
Karmanov
Andrey
gubich.niifi@gmail.com
Gubich
Ivan
0000-0003-3037-3601
Pronin
Igor
Hierarchical self-assembly of SiO2-SnO2 nanoand microstructures in combined sol-gel systems
Using the IR spectroscopy method, studies were carried out on the processes of hierarchical self-assembly of SiO2-SnO2 nano- and microstructures in combined sol-gel systems obtained by mixing film-forming sols with different maturation times, which meets the goals and objectives of nanostructural engineering. Characteristic absorption peaks were identified that correspond to the process of hydrolytic polycondensation and carry information about the process of self-assembly in the analyzed systems.
10.18721/JPM.173.207
538.975
nanostructure engineering
hierarchical self-assembly
sol-gel technology
spectroscopic investigation
https://physmath.spbstu.ru/article/2024.76.7/
CNF
RUS
46-51
Moscow Pedagogical State University
Bondareva
Polina
p.bondareva2016@yandex.ru
Moscow, Russian Federation
0000-0001-6494-0147
Moscow Pedagogical State University
Shein
Kirill
Moscow, Russian Federation
Lyubchak
Anastasia
anlyubchak@miem.hse.ru
0009-0008-4349-7332
Moscow Pedagogical State University
Izmaylov
Ramil
Moscow, Russian Federation
Baeva
Elmira M.
baeva.elm@gmail.com
Goltsman
Grigory
goltsman@rplab.ru
0000-0003-2560-6503
National Research University “Higher School of Economics”
Gayduchenko
Igor
igaiduchenko@hse.ru
Moscow, Russian Federation
Johnson noise thermometry of CVD graphene bolometers
Graphene, due to its record low electron heat capacity and weak electron-phonon coupling at low temperatures, is considered as a promising material for creating terahertz hot electron bolometers. The main challenge to the development of such devices is the weak dependence of graphene resistance on temperature. Here we demonstrate measurement system based on Johnson noise thermometry to directly measure electron temperature in graphene. We measure thermal conductance due to electron-phonon coupling at bath temperature 4,2 K. Our graphene is synthesized by chemical vapor deposition (CVD) method and transferred to Si/SiO2 substrate. The electron–phonon thermal conductance has a temperature power law of T4 which is typical for highly disordered graphene. We estimate the sensitivity of CVD graphene based bolometer with Johnson noise readout. The internal noise equivalent power (NEP) is determined by thermodynamic fluctuations and is equal to 3 fW/Hz0.5. The sensitivity of the detector is limited by the read out noise and is equal to 267 pW/Hz0.5. Thе low internal NEP together with potential fast response time makes CVD graphene to be promising material in the area of bolometry.
10.18721/JPM.173.208
538.9
graphene
THz detectors
bolometers
noise thermometry
https://physmath.spbstu.ru/article/2024.76.8/
CNF
RUS
52-56
Lagutkina
Aleksandra
lagutkina.aa@phystech.edu
Vizgalov
Victor
vizgalov.va@mipt.ru
Development of solid-state composite cathode material for solid-state lithium-ion batteries based on lithium ferrophosphate LiFePO4
In the past few decades all-solid-state lithium-ion batteries have become a promising frontier due to their increased safety, higher energy density and unique mechanical properties. One of the main issues in this field is establishing steady transport of lithium ions across the electrode–electrolyte interface, which requires modifications of the electrode structure. In this research we investigated mechanical properties, capacity and cycling performance of a composite cathode based on solid polymer electrolyte as a binder, lithium ferrophosphate as active material and carbon black as electron conductor. Composite cathode was prepared with the help of ball-milling to reduce the particle size and increase the homogeneity of the material, which resulted in mechanically stable flexible crack-free electrodes after coating, drying and calendaring. Achieved specific capacity of the electrodes corresponds to theoretical values, electrodes show long-term sustainability in systems with liquid electrolyte and are applicable to solid-state systems.
10.18721/JPM.173.209
621.3.035.221.14
all-solid-state lithium-ion battery
composite electrodes
lithium ferrophosphate electrodes
solid electrolyte
polymer electrolyte
https://physmath.spbstu.ru/article/2024.76.9/
CNF
RUS
57-61
0009-0003-5049-538X
Alferov University
Zavyalova
Eseniya
St. Petersburg, Russian Federation
0000-0001-7143-6686
Kusnetsov
Alexey
alkuznetsov1998@gmail.com
0000-0001-7223-7232
Moscow Institute of Physics and Technology (National Research University)
Bolshakov
Alexey
acr1235@mail.ru
Moscow, Russian Federation
Peculiarities of the local electromagnetic field distribution in non-van-der-Waals InGaS3 thin layers slot waveguides
InGaS3 thin layers are promising nanostrures in the field of nanophotonics owing to the broad bandgap, sufficiently high refractive index and the simplicity of fabrication. Here we numerically investigate a system based on InGaS3 waveguides, standing side by side. We demonstrate the localization of the electromagnetic field inside the gap between two waveguides and obtain the refractive indices and losses for the slot waveguide modes at a wavelength of 505 nm. Transmittance spectra of considered configurations of different geometrical parameters were obtained The waveguiding cut-off related to the absorption inside the material and the delocalization of the electromagnetic field was determined. The obtained results open the possibility for fabrication of novel photonic devices based on InGaS3 thin layers.
10.18721/JPM.173.210
538.9
InGaS3
slot waveguide
transmittance
thin layer
numerical simulations
https://physmath.spbstu.ru/article/2024.76.10/
CNF
RUS
62-65
Nouraldeen
Messan
messannouraldeen@phystech.edu
0009-0001-6926-5205
Shestakov
Nikita
shestakov.nr@phystech.edu
Moscow Institute of Physics and Technology (National Research University)
Vershinina
Olesya
seraia.ov@phystech.edu
Dolgoprudny, Moscow region, Russian Federation
Ivanov
Victor
ivanov.vv@mipt.ru
Synthesis of aluminum nanoparticles using spark discharge for applications in ultraviolet plasmonics
This work demonstrates synthesis Al metal nanoparticles with plasmon resonance in the ultraviolet region by the spark discharge method in an argon atmosphere. The resulting primary particles have an Al metal core and a natural oxide shell and size in range from 5 to 50 nm. Importantly, these nanoparticle ensembles show wide extinction peaks, with the highest point between 250 and 480 nm wavelength. The position of the peak can be varied by synthesis parameters. During our research, we employed laser radiation at a wavelength of 355 nm, with pulse energies reaching up to 350 μJ and pulse repetition rates of up to 2000 Hz. We observed that the sintering process of nanoparticles exhibited a dynamic change in size, which correlated with the energy of the laser pulses. This dependence was illustrated by an S-shaped shrinkage curve. By subjecting the initial agglomerates to a series of impacting laser pulses, we successfully achieved complete sintering, resulting in the transformation of the agglomerates into spherical nanoparticles.
10.18721/JPM.173.211
537.9
aluminum nanoparticles
nanoparticles sintering
laser sintering
plasmon resonance
https://physmath.spbstu.ru/article/2024.76.11/
CNF
RUS
66-70
Kenesbay
Ramazan
ramazan.kenesbay.1999@gmail.com
Toikka
Andrei
atoikka@obraz.pro
Alferov University
Baeva
Maria
maria.baeva111@gmail.com
St. Petersburg, Russian Federation
0000-0001-9792-045X
Peter the Great St. Petersburg Polytechnic University
Mukhin
Ivan
muhin_is@spbstu.ru
0000-0003-4517-0807
Alferov University
Mitin
Dmitry
mitindm@mail.ru
St. Petersburg, Russian Federation
Suppressed phase segregation in CsPbIBr2 based PeLEC
In this work we describe some strategies to suppress phase segregation in perovskite light-emitting electrochemical cells based on mixed halide CsPbIBr2 perovskite. Lead halide perovskites are widely used class materials used for creating optoelectronic devices. However, appearing phase segregation causes peak separation on photo- and electro luminance spectra, which limit efficiency and color rendering of devices based on lead halide perovskite materials. Improving crystallinity of perovskite film by annealing temperature controlling can affect halide separation. Mn2+ doping was used to enhance materials stability of lead halide perovskite. Another strategy is crystal grains passivation by polymers, i.e. polyethylene oxide and polyvinylidene fluoride, which reduce crystal defect density that cause phase segregation. All these strategies were applied in this work and demonstrate single peaks on photo- and electro luminance spectra. Suggested solution of phase segregation problem allows to create more stable and effective CsPbIBr2 based perovskite light-emitting electrochemical cells that work in red range of visible spectrum (620-680 nm).
10.18721/JPM.173.212
537.9
CsPbIBr2
perovskite
PeLEC
phase segregation
mixed anion
https://physmath.spbstu.ru/article/2024.76.12/
CNF
RUS
71-77
0009-0001-3683-5558
ITMO University
Papylev
Denis
dspapylev@itmo.ru
St. Petersburg, Russian Federation
ITMO University
Kolodeznyi
Evgenii
evgenii_kolodeznyi@itmo.ru
St. Petersburg, Russian Federation
Babichev
Andrei
scientific.ocean@gmail.com.
Peter the Great St. Petersburg Polytechnic University
Kharin
Nikita
kharin.nikita66@gmail.com
St. Petersburg, Russian Federation
Voznyuk
Gleb
gvvozniuk@itmo.ru
Mitrofanov
Maksim
Mitrofanov@mail.ioffe.ru
0000-0003-4851-3641
Slipchenko
Sergey
Lyutetskii
Andrey
Lutetskiy@mail.ioffe.ru
Evtikhiev
Vadim
Evtikhiev@mail.ioffe.ru
ITMO University
Karachinsky
Leonid
lkarachinsky@itmo.ru
St. Petersburg, Russian Federation
ITMO University
Novikov
Innokenty
innokenty.novikov@itmo.ru
St. Petersburg, Russian Federation
Peter the Great St. Petersburg Polytechnic University
Panevin
Vadim
pvyu@rphf.spbstu.ru
Pikhtin
Nikita
nike@hpld.ioffe.ru
0000-0002-0789-4241
Alferov University
Egorov
Anton
anton.egorov@connector-optics.com
St. Petersburg, Russian Federation
Temperature performance of ring quantum-cascade laser with staircase-like distributed feedback grating
Direct ion-beam lithography was used to realize the staircase-like second order distributed feedback grating formed in the top cladding layers of ring quantum-cascade laser. As a result, the depth of grating slits was varied from 0.6 to 2.6 μm along the ring cavity. The whispering gallery modes lasing with near 1 kA/cm2 threshold current density at 77 K temperature was obtained with lasing wavelength close to 7.64 μm. Rise of the temperature up to 292 K yields the multi-mode lasing near to 7.94 μm with moderate threshold current density ~4 kA/cm2. Time-resolved spectral characterization results are also discussed.
10.18721/JPM.173.213
538.9
molecular-beam epitaxy
quantum-cascade laser
indium phosphide
ion-beam etching
direct lithography
ring cavity
https://physmath.spbstu.ru/article/2024.76.13/
CNF
RUS
78-83
Arsenov
Pavel
arsenov.pv@mipt.ru
Pilyushenko
Konstantin
piliushenko.ks@mipt.ru
Kazarinova
Daria
kazarinova.dd@mipt.ru
Vlasov
Ivan
vlasov.is@mipt.ru
Moscow Institute of Physics and Technology (National Research University)
Volkov
Ivan
volkov.ia@mipt.ru
Dolgoprudny, Moscow region, Russian Federation
Millifluidic polyol synthesis of Ag nanowires and microplotter printing of transparent conductive films
Millifluidic polyol synthesis teflon tube (i.d. 1 mm) was studied and used to obtain silver nanowire dispersions. As a result of the experiments, the optimal concentrations of the reagents (silver nitrate AgNO3, ethylene glycol and polyvinylpyrrolidone) were investigated and found to obtain homogeneous nanowires with high length-to-diameter ratios. As a result of the synthesis, Ag nanowires were obtained, which were used to form transparent conductive electrodes using microplotter printing. Transparent conductive electrodes with high transparency of more than 80% at a wavelength of 550 nm with a surface resistance of 52-229 Ohm/sq.
10.18721/JPM.173.214
538.9
polyol synthesis
millifluidics
silver nanowires
microplotter printing
transparent electrode
https://physmath.spbstu.ru/article/2024.76.14/
CNF
RUS
84-87
0000-0001-8440-494X
Alferov University
Novikova
Kristina
novikova_k@spbau.ru
St. Petersburg, Russian Federation
0009-0000-3147-6974
Alferov University of RAS
Funtikova
Anastasiia
0000-0002-8661-4083
Alferov University
Mozharov
Alexey
mozharov@spbau.ru
St. Petersburg, Russian Federation
0000-0001-9792-045X
Peter the Great St. Petersburg Polytechnic University
Mukhin
Ivan
muhin_is@spbstu.ru
Numerical investigation of influence GaP nanowire geometry to light extraction efficiency of red light-emitting diode
Currently, micro-LEDs are promising optoelectronic devices. Numerical investigation was carried out to study the influence of the GaP nanowires geometric parameters on the light extraction efficiency to improve micro-LEDs efficiency. The nanowires diameter has been shown to significantly alter the light extraction efficiency. The optimal nanowire diameter for a wavelength of 650 nm is close to 200 nm.
10.18721/JPM.173.215
538.975, 538.958
Red LEDs
GaP
NWs
molecular beam epitaxy
light extraction efficiency
https://physmath.spbstu.ru/article/2024.76.15/
CNF
RUS
88-92
Duplinsky
Alexey
a.duplinsky@goqrate.com
0000-0003-1511-1128
Khmelev
Aleksandr
a.khmelev@goqrate.com
0009-0006-5851-6175
Bakhshaliev
Ruslan
r.bakhshaliev@goqrate.com
0009-0000-8253-7263
Sevryukov
Dmitriy
d.sevryukov@goqrate.com
0009-0002-2294-3731
Barbyshev
Konstantin
k.barbyshev@goqrate.com
0000-0002-1599-9801
Kurochkin
Vladimir
v.kurochkin@rqc.ru
Polarization extinction ratio conversion due to pointing system impact in satellite quantum key distribution
Quantum key distribution via satellites enables the technology to be applied at transcontinental scale; nevertheless, in contrast to fiber systems, using a free-space optical communication channel presents certain extra technological obstacles. The contribution of the acquisition, pointing and tracking system’s operation to the potential quantum bit error value is investigated in this research. The polarization extinction ratio measurements varying with the pointing mirror angular position are reported, based on these data, the upper limit of the quantum bit error is predicted for several types of satellite passages.
10.18721/JPM.173.216
29.31.00
quantum key distribution
polarimetry
polarization extinction ratio
free-space optics
https://physmath.spbstu.ru/article/2024.76.16/
CNF
RUS
93-97
0000-0002-8726-0416
Dashkov
Alexander
0009-0006-9763-2830
Kostromin
Nikita
Alferov University
Barykin
Dmitrii
d.a.barykin02@mail.ru
Goray
Leonid
lig@pcgrate.ru
Optimization of mid-infrared quantum cascade detectors
In this work, the optimization of the design of quantum cascade detectors is considered. The initial design studied was a detector structure based on an AlGaAs/GaAs heteropair, consisting of four quantum wells. A genetic algorithm was utilized to optimize the responsivity and detectivity of the design under study by varying of the widths and chemical composition of the first five layers of the cascade. The responsivity and detectivity were simplified to the characteristics, that can be evaluated based on the solutions of the Schrödinger and Boltzmann equations. The results demonstrate a strong dependence on the optimization algorithm parameters and designate significant change from the initial design. We have shown that to achieve optimal output characteristics and improve the convergence rate, one must use larger populations and high mutation probability in the genetic algorithm. The analysis of the obtained designs also shows that additional regularization techniques are required to achieve better output characteristics of the device. Specifically, the appropriate weighting of the set of optimized characteristics must be determined before final optimization.
10.18721/JPM.173.217
538.915, 519.688
quantum cascade detector
optimization
numerical simulations
Schrodinger equation
https://physmath.spbstu.ru/article/2024.76.17/
CNF
RUS
98-102
0009-0006-9763-2830
Kostromin
Nikita
0000-0002-8726-0416
Dashkov
Alexander
Alferov University
Barykin
Dmitrii
d.a.barykin02@mail.ru
Numerical optimization of semiconductor waveguide structure
Research on radiation sources in the IR and THz ranges operating at room temperature is still highly attractive to this day. Waveguides play a critical role in these structures and their improvement is also required. This paper studies the optimization of waveguides based on GaAs material with different doping levels of layers to reduce absorption losses and increase the optical confinement factor. The optimization is carried out in three steps: selection of optimization parameters, determination of initial values of parameters and Bayesian optimization. The thickness and doping level of heavily doped layers are chosen as optimization parameters. The results show the Bayesian algorithm converges to the desired values rather quickly. It was found that the dependence of the waveguide output characteristics on concentration is weaker than on layer thickness. An increase in layer thickness leads to an increase in losses. Weak asymmetry in the structure can lead to a slight improvement in the confinement factor value.
10.18721/JPM.173.218
537.87, 519.688
quantum cascade laser
waveguide
gallium arsenide
optimization
Bayesian optimization
https://physmath.spbstu.ru/article/2024.76.18/
CNF
RUS
103-106
Institute of Automation and Control Processes FEB RAS
Balagan
Semyon
simak_64@mail.ru
Vladivostok, Russian Federation
0000-0003-2170-7972
Shevlyagin
Alexander
shevlyagin@iacp.dvo.ru
The quest for direct band beta iron disilicide: collaboration of theoretical and experimental approaches
In the presented work, a theoretical study of the effect of β-FeSi2 lattice deformation on the type and magnitude of the first transition in the electronic band structure was carried out. Images of nanocrystallites obtained using high-resolution transmission electron microscopy were used as a source of deformation data. All in all, 137 variants of β-FeSi2 lattice deformation were considered in the work. Six types of first transitions different from the first transition in unstrained β-FeSi2 were discovered. The values of the first transitions from 0.02 to 0.64 eV (direct) and from 0.01 to 1.12 eV (indirect) were obtained.
10.18721/JPM.173.219
535-15+539.21+539.25
silicon
beta Fe disilicide
ab initio calculation
https://physmath.spbstu.ru/article/2024.76.19/
CNF
RUS
107-111
Institute of Automation and Control Processes FEB RAS
Balagan
Semyon
simak_64@mail.ru
Vladivostok, Russian Federation
0000-0003-4127-2988
Institute of Automation and Control Processes, Far Eastern Branch of the RAS
Galkin
Nikolay
galkin@iacp.dvo.ru
Effect of diameter on lattice thermal conductivity of α-FeSi2 and ε-FeSi nanowires
In this study the effect of α-FeSi2 and ε-FeSi nanowires diameter on the lattice thermal conductivity was considered. Ab initio modeling was performed in the temperature range of 100–700 °K and nanowires diameter range of 6–48 nm. Results showed that at minimal considered diameter nanowires have 1.4–4.5 times lower lattice thermal conductivity than bulk material depending on temperature and nanowire elongate direction.
10.18721/JPM.173.220
536.2+537.32+539.21
silicon
Fe silicides
nanowires
ab initio calculation
thermal conductivity
https://physmath.spbstu.ru/article/2024.76.20/
CNF
RUS
112-115
Babukhin
Danila
dv.babukhin@gmail.com
Sych
Denis
denis.sych@gmail.com
Efficiency analysis of generative adversarial networks for single pixel imaging
The single-pixel camera provides a prospective tool for imaging beyond conventional pixel-matrix-based devices. In recent years, neural networks have become a part of singlepixel imaging as a method to restore an image from intensity measurements computationally. Generative adversarial networks (GANs) are particularly well suited for this task. In this paper, we investigate the performance of a generative adversarial least squares network in the task of image reconstruction from a single-pixel camera at low sampling rates. We demonstrate that stable successful image reconstruction is possible at sampling rates around 8%, and that the reconstructed images should match the structure of the images present in the training sample.
10.18721/JPM.173.221
53
single pixel imaging
neural networks
image restoration
https://physmath.spbstu.ru/article/2024.76.21/
CNF
RUS
116-120
Lyubchak
Anastasia
anlyubchak@miem.hse.ru
0000-0001-6494-0147
Moscow Pedagogical State University
Shein
Kirill
Moscow, Russian Federation
Goltsman
Grigory
goltsman@rplab.ru
0000-0003-2560-6503
National Research University “Higher School of Economics”
Gayduchenko
Igor
igaiduchenko@hse.ru
Moscow, Russian Federation
Waveguide-integrated graphene terahertz detector
Terahertz (THz) integrated circuits is a promising platform to create low cost and efficient components for high-speed sixth-generation (6G) communication networks. One of the key components for this application is detectors and mixers integrated on THz silicon waveguide. Graphene, due to its unique and tunable properties such as zero band gap, high charge mobility and low electronic heat capacity, has already demonstrated promise in free space THz detectors, mixers and modulators development. Moreover, graphene photodetectors integrated on the waveguide have already been demonstrated in visible and near infrared regions. In this work we present an electromagnetic model of graphene terahertz detector integrated on silicon waveguide. Graphene THz detector was designed for operation at 150 GHz and can be used in the nextgeneration wireless communications for an ultrafast on-chip THz signal processing.
10.18721/JPM.173.222
535.93
terahertz
dielectric waveguide
photonic-integrated circuit
dielectric effectivemedium waveguide
https://physmath.spbstu.ru/article/2024.76.22/
CNF
RUS
121-124
0000-0001-7989-6513
Malokhatko
Sofya
malohatko@sfedu.ru
0000-0001-8635-2573
Gusev
Evgeny
eyugusev@sfedu.ru
Jiang
Liyuan
jiangliyuan@sdlaser.cn
Southern Federal University
Ageev
Oleg
ageev@sfedu.ru
Taganrog, Russian Federation
Effect of internal mechanical stresses in a multilayer structure on displacement for various designs of microelectromechanical membranes
In the manufacture of microelectromechanical sensors based on multilayer membranes, internal mechanical stresses arise in the structure. A preliminary assessment of the effect of internal mechanical stresses on the initial displacement of structures of various shapes will allow to choose the most appropriate design solution for various applications. The paper presents the results of numerical modeling of the structures of multilayer membranes of three types: round, square and square with transverse and angular beams. The displacement values for each type of multilayer membranes are obtained in accordance with the influence of internal mechanical stresses in each layer. The results showed that the effect of internal mechanical stresses in films (SiO2, Mo, ZnO) of a multilayer structure on square and round membranes is insignificant (values ranged from 2.43·10–13 to 7.83·10–13 nm). Internal mechanical stresses in membrane layers with transverse and angular beams make a significant contribution to the initial displacement of the structure (values ranged from 20 to 570 nm), however, the sensitivity of such structures is higher than that of rigid structures. The influence of technological conditions of film formation in multilayer membranes on their stress-strain state in ultrasonic sensors is investigated. The values of internal mechanical stresses in SiO2 films are obtained.
10.18721/JPM.173.223
51-74
microelectromechanical sensors
multilayer membrane
internal mechanical stress
https://physmath.spbstu.ru/article/2024.76.23/
CNF
RUS
125-129
0009-0004-6560-7409
Tabieva
Arina
tabieva.arina@itmo.ru
0000-0002-5109-2086
Trifanov
Alexander
alextrifanov@itmo.ru
0000-0002-6482-0951
Tushavin
Gleb
tushavin@itmo.ru
0009-0006-8671-1752
Matveeva
Milena
mvmatveeva@itmo.ru
Modeling the dynamics and properties of the squeezed state of light in a phase modulator
In this work, we investigate the transformation of a squeezed by photon-number quantum state of a single-mode optical signal during phase modulation process. Within the framework of the semiclassical model of the phase modulator, we obtained estimations for the statistical properties of individual modes and mode sub-ensembles of the signal spectrum. We shown that for the case of modulation of squeezed vacuum, the entire spectrum of the modulated signal evaluates to the entangled state of a number of frequency modes. The results obtained in this work enable the use of squeezed modulated light states in quantum key distribution systems and various interferometric applications.
10.18721/JPM.173.224
535.14
phase modulator
multimode quantum optical signal
SU(1.1) algebra
squeezed state of light
https://physmath.spbstu.ru/article/2024.76.24/
CNF
RUS
130-134
0009-0006-8671-1752
Matveeva
Milena
mvmatveeva@itmo.ru
0000-0002-5109-2086
Trifanov
Alexander
alextrifanov@itmo.ru
0000-0002-6482-0951
Tushavin
Gleb
tushavin@itmo.ru
0009-0004-6560-7409
Tabieva
Arina
tabieva.arina@itmo.ru
Investigation of entangled states of a three-mode electro-optical modulator
We study the dynamic properties and algebraic invariants of the model of phase modulation of quantum light by microwave radiation. The quasi-energy levels of the system are described by the eigenvalues of the effective Hamiltonian, which generators obbey to su(2) algebra and have a nontrivial internal structure. The dynamics of states is studied in Fock space. Invariant Hamiltonian spaces are associated with irreducible representations of the su(2) algebra, within which the Hamiltonian matrix is partitioned into finite blocks. Within this model we investigate the generating process of two-mode entangled states using the single-tone Fock state at the input of phase modulator.
10.18721/JPM.173.225
517.986.5
phase modulator
Hamiltonian
entangled states
ladder operators
https://physmath.spbstu.ru/article/2024.76.25/
CNF
RUS
135-138
Federal State Budgetary Institution of Science K.A. Valiev Institute of Physics and Technology of the RAS Yaroslavl Branch
Grushevsky
Egor
yaregor@mail.ru
Yaroslavl, Russian Federation
Federal State Budgetary Institution of Science K.A. Valiev Institute of Physics and Technology of the RAS Yaroslavl Branch
Savinsky
Nikolay
savinski1@yandex.ru
Yaroslavl, Russian Federation
Trushin
Oleg
otrushin@gmail.com
The method of obtaining Ni and Co nanowires in porous anodic alumina matrices
This paper focuses on the investigation of producing Ni and Co nanowire arrays synthesized using Al2O3 porous template. Porous alumina samples were obtained by double electrochemical anodizing of the prepared foil in 0.5 M oxalic acid, at a voltage of 60 V and a temperature of 25 °C. The pore diameter distribution maximums are about 85 nm. Nanowires were electrodeposited in a 3-electrode electrochemical cell into prepared matrices in a potentiostatic and galvanostatic mode. Studies of the surface of porous membranes and the geometry of nanowires were carried out using scanning electron microscope.
10.18721/JPM.173.226
539.232; 542.06; 546–1; 544.654.2
anodization
aluminum oxide matrices
nanowires
electrochemical deposition
https://physmath.spbstu.ru/article/2024.76.26/
CNF
RUS
139-142
National Research Tomsk State University
Kukenov
Olzhas
okukenov@mail.ru
Tomsk, Russian Federation
0009-0008-8052-3253
National Research Tomsk State University
Dirko
Vladimir
Tomsk, Russian Federation
0000-0002-4029-8353
National Research Tomsk State University
Lozovoy
Kirill
Tomsk, Russian Federation
National Research Tomsk State University
Kokhanenko
Andrey
kokh@mail.tsu.ru
Tomsk, Russian Federation
0000-0002-1196-6199
Voitsekhovskii
Alexander
0009-0000-9839-894X
Maier
Xeniya
Study of the formation mechanisms of Ge terraces on Si(100) during MBE using the RHEED method
In the work, a comparison of the widths of Ge and Si terraces on Si(100) at temperatures in the range from 200 °C to 800 °C was made using diffraction patterns in the [100] direction. The temperatures at which the growth mechanisms for the formation of monoatomic steps of Ge on Si(100) change have been established.
10.18721/JPM.173.227
539.27, 539.234
molecular beam epitaxy
reflection high-energy electron diffraction
step-flow growth
heteroepitaxy
https://physmath.spbstu.ru/article/2024.76.27/
CNF
RUS
143-147
Gridchin
Vladislav
gridchinvo@gmail.com
0000-0002-4110-1647
Shugabaev
Talgat
talgashugabaev@mail.ru
Lendyashova
Vera
erilerican@gmail.com
Kotlyar
Konstantin
konstantin21kt@gmail.com
St. Petersburg State University
Khrebtov
Artem
khrebtovart@mail.ru
St. Petersburg, Russian Federation
Dragunova
Anna
anndra@list.ru
Kryzhanovskaya Natalia V.
Natalia
nkryzhanovskaya@hse.ru
Reznik
Rodion
moment92@mail.ru
Cirlin
George
george.cirlin@mail.ru
Growth of long core-shell InGaN nanowires by plasma-assisted molecular beam epitaxy with gradually increasing substrate temperature
This work presents the results of a study on the morphological and optical properties of InGaN nanowires grown using two different substrate temperature regimes. It is obtained that a gradual increase in the substrate temperature during the growth process makes it possible to obtain long morphologically homogeneous nanowires with a core-shell structure. The photoluminescence of nanowires is in the green range and is three times higher than that of similar structures grown in a stationary temperature regime.
10.18721/JPM.173.228
538.975
InGaN
nanowires
core-shell
MBE
photoluminescence
gradually increasing substrate temperature
https://physmath.spbstu.ru/article/2024.76.28/
CNF
RUS
148-151
0000-0002-3779-8242
Starnikova
Alexandra
starnikova@sfedu.ru
0000-0003-3725-6053
Petrov
Viktor
vvpetrov@sfedu.ru
Electrical properties of ZnO/Au and ZnO/SnO2 nanorod arrays when exposed to UV irradiation with controlled intensity
Arrays of zinc oxide (ZnO) nanorods were synthesized on quartz substrates by the hydrothermal method. The nanorods were grown mainly in a vertical orientation, had a length of 500–800 nm and an average cross-sectional size of 40–80 nm. Gold nanoclusters with average sizes of 9 ± 1 nm and 4 ± 0.5 nm and tin with average sizes of 30 ± 5 nm and 15 ± 3 nm were formed on top of the ZnO nanorods. Annealing was carried out at 300 °C for 2 hours with the formation of arrays of ZnO/SnO2 nanorods. For the manufacture of resistive sensor elements, V/Ni contact metallization was applied on top of the samples. The study of the electrophysical characteristics of the ZnO/Au and ZnO/ SnO2 nanorods arrays showed that exposure to UV radiation of different intensity leads to a change in the electrical resistance of the sensor structure, and also affects the time of establishing the readings of the obtained samples.
10.18721/JPM.173.229
504.064.3
ZnO
nanorods
electrophysical properties
ultraviolet irradiation
https://physmath.spbstu.ru/article/2024.76.29/
CNF
RUS
152-156
0000-0002-3503-7458
St. Petersburg Electrotechnical University "LETI"
Maksimova
Alina A.
deer.blackgreen@yandex.ru
0000-0002-0061-6687
Alferov University
Uvarov
Alexander
lumenlight@mail.ru
0000-0001-6869-1213
Alferov University
Vyacheslavova
Ekaterina
cate.viacheslavova@yandex.ru
0000-0002-4894-6503
Alferov University
Baranov
Artem I.
baranov_art@spbau.ru
St. Petersburg, Russian Federation
0009-0005-9558-4583
Yarchuk
Ernst
0000-0002-7632-3194
Alferov University
Gudovskikh
Alexander
gudovskikh@spbau.ru
Influence of in-situ plasma treatment during PE-ALD of GaN on growth rate and morphology
In this work, the plasma-enhanced atomic layer deposition (PE-ALD) technique, including continuous hydrogen plasma, was studied for GaN growth. Also, the use of plasma at the nitrogen step only as well as argon plasma surface activation were explored. The structural properties of GaN layers grown on Si substrates at different conditions were studied by atomic force microscopy (AFM). It was shown that in-situ Ar plasma treatment during the PE-ALD process of GaN growth leads to improvement of the surface roughness as well as an increase in growth rate. On the contrary, the use of hydrogen plasma during the process leads to a drastic increase in surface roughness due to parasitic deposition.
10.18721/JPM.173.230
621.315.592
gallium nitride
plasma treatment
atomic layer deposition
https://physmath.spbstu.ru/article/2024.76.30/
CNF
RUS
157-160
0009-0009-4548-3724
Agafonov
Dmitriy
0000-0001-9319-2475
Research Institute of Electronic and Mechanical Devices
Novichkov
Maksim
Penza, Russian Federation
Shepeleva
Anastasia
eduard.shepelev.67@mail.ru
0000-0001-9602-7221
Research Institute of Electronic and Mechanical Devices
Gurin
Sergey
Penza, Russian Federation
0009-0006-3140-5897
Research Institute of Electronic and Mechanical Devices
Ryzhov
Alexandr
Penza, Russian Federation
Moscow Institute of Physics and Technology (MIPT)
Volkov
Valentyn
vsv.mipt@gmail.com
Moscow, Russian Federation
Sensor of fast-variable and static pressure
A new design and technological solution has been developed for the sensing element of a static and rapid-change pressure sensor based on the integration of strain-resistant and piezoelectric films of nanometer size, which made it possible to create a multifunctional sensor element with small pressure deviations from the actual values.
10.18721/JPM.173.231
544.478-03
sensing element
pressure sensor
strain gauge
piezoelectric thin films
static pressure
dynamic pressure
https://physmath.spbstu.ru/article/2024.76.31/
CNF
RUS
161-165
Frolov
Ilya
ilya-frolov88@mail.ru
Radaev
Oleg
oleg.radaev.91@mail.ru
0000-0003-4854-2813
Sergeev
Viacheslav
sva@ulstu.ru
Threshold current of separate spectral components of the emission spectrum of InGaN LEDs
The results of measurements of the threshold current of ultraviolet, blue and green InGaN LEDs on different spectral components of the full emission spectrum are presented. It is shown that the threshold current of long-wave components of the spectrum is greater than the threshold current of short-wave components. The relative difference in the values of the threshold current of the spectral components of the short-wave and long-wave wings of the emission spectrum at the level of half the radiation power is associated with the inhomogeneous distribution of indium concentration in the quantum well of the InGaN/GaN heterostructure and for the studied ultraviolet LEDs is 2.8%, 4.4% for blue, 25.7% for green.
10.18721/JPM.173.232
621.382.088
LED
InGaN/GaN heterostructure
emission spectrum
threshold current
measurement
https://physmath.spbstu.ru/article/2024.76.32/
CNF
RUS
166-172
Peter the Great St. Petersburg Polytechnic University
Provodin
Daniil
provodindanya@gmail.com
St. Petersburg, Russian Federation
Yakusheva
Maria
yakusheva.ma@edu.spbstu.ru
Davydov
Vadim
davydov_vadim66@mail.ru
A new method of managing the discretization of the scale in a mobile differential refractometer
The necessity of developing a new method for managing the discretization of the scale in a mobile differential refractometer has been justified. The implementation of this method is necessary to expand the functional capabilities of the developed mobile differential refractometer (providing a measurement mode of the refractive index of a liquid medium ranging from 1.23 to 2.63 with an error of 0.0001). All existing liquid media and their mixtures worldwide fall within this measurement range. When using other models of compact and mobile refractometers for express control, such a measurement range of n cannot be provided. Within the range of change of n from 1.23 to 2.63, a new management method has been implemented, which ensured a measurement error of 0.0001. Studies of various media have been conducted, confirming the adequacy of our development.
10.18721/JPM.173.233
535,015
refraction
liquid
refractive index
Anderson cuvette
laser radiation
photodiode array
measurement error
https://physmath.spbstu.ru/article/2024.76.33/
CNF
RUS
173-176
0009-0001-8930-5438
Lavrinenko
Valeriy
Lavrinenko_valerav@inbox.ru
Vasilieva
Anastasia
anastasiastru@mail.ru
Parfenov
Vadim
vadim_parfenov@mail.ru
0009-0003-0155-4208
Novikov
Ivan
ianovikov@stud.etu.ru
Investigation of microfluidic topology formation with the use of IR pulse laser
The work considers the possibility of creating microfluidic topology elements on a stainless-steel plate using laser processing. The results of multi-stage exposure of near IR laser radiation to a metal surface in order to create microchannel parts (grooves) with a semicircular profile, as well as through holes that form part of typical microfluidic topologies, are presented. This paper describes the main technological features of the effect of laser radiation on a metal plate, which affect the effectiveness of creating microtopology elements.
10.18721/JPM.173.234
53.06
microfluidics
microfluidic topology
laser processing
laser perforation
https://physmath.spbstu.ru/article/2024.76.34/
CNF
RUS
177-181
Ivanov
Anton
a-e-ivano-v@yandex.ru
Submicron Heterostructures for Microelectronics Research and Engineering Center of the RAS
Chernyakov
Anton
chernyakov.anton@yandex.ru
Russia, 194021, St.Petersburg, Polytechnicheskaya, 26
Talnishnikh
N.A.
Nadya.FEL@mail.ru
0000-0003-4457-8149
Ioffe Institute
Shabunina
Evgeniia
St. Petersburg, Russian Federation
Shmidt
Natalia
Competing processes in nitride alloys in MQWs of LEDs
The nature of competing processes leading to narrowing and broadening of the electroluminescence spectra width at half maximum under the injection current in nitride LEDs emitting at wavelengths of 270–280 nm and 530–540 nm has been studied. It was found out that there may be local regions with disturbed stoichiometry of random alloy fluctuations, enriched in excited defects (“deep center + local vibrations”) in nitride MQWs with random alloy fluctuations. The capture of injected charge carriers by such defects in MQWs located in the space charge region of the pn junction was shown to lead to their coordination rearrangement in the lattice. This also results in a more equilibrium state of random alloy fluctuations and is accompanied by a narrowing of the full width at half maximum electroluminescence spectrum. However, this mechanism is a source of carrier loss that reduces the external quantum efficiency of LEDs at the maximum. It was shown experimentally that the higher the level of disorder in random alloy fluctuations, the lower the external quantum efficiency values. The nonequilibrium filling of the lateral random allow fluctuation by charge carriers in MQWs located outside the space charge region causes the broadening of the full width at half maximum electroluminescence spectrum in LEDs. This mechanism leads to a drop in external quantum efficiency at current densities j > 30 A/cm2.
10.18721/JPM.173.235
628.9.038
MQW LEDs
alloy level disorder
FWHM
random alloy fluctuation
https://physmath.spbstu.ru/article/2024.76.35/
CNF
RUS
182-186
0000-0002-4894-6503
Barantsev
Oleg
ovbarantsev@gmail.com
Alferov University
Vasilkova
Elena
elenvasilkov@gmail.com
St. Petersburg, Russian Federation
Alferov University
Pirogov
Evgeny
zzzavr@gmail.com
St. Petersburg, Russian Federation
0000-0003-1835-1629
Alferov University
Shubina
Kseniia
rein.raus.2010@gmail.com
St. Petersburg, Russian Federation
0000-0002-4894-6503
Alferov University
Baranov
Artem I.
baranov_art@spbau.ru
St. Petersburg, Russian Federation
JSC OKB-Planeta
Voropaev
Kirill
kirill.voropaev@novsu.ru
V. Novgorod, Russian Federation
0009-0009-2615-6795
Vasil’ev
Andrey
ITMO University
Karachinsky
Leonid
lkarachinsky@itmo.ru
St. Petersburg, Russian Federation
ITMO University
Novikov
Innokenty
innokenty.novikov@itmo.ru
St. Petersburg, Russian Federation
0000-0001-8629-2064
Alferov University
Sobolev
Maxim
St. Petersburg, Russian Federation
Influence of the doping level in the absorption layer of InGaAs/InP 2.5 μm photodetectors on their electrical properties
In0.83Ga0.17As/InP PIN-photodiode heterostructures with different doping levels have been grown by molecular beam epitaxy. Metamorphic buffer layers were applied to prevent misfit dislocations nucleation in active layers. Capacitance-voltage and current-voltage curves of fabricated photodiodes have been measured and analysed. The impact of various dark current mechanisms has been estimated after the measurements of current-voltage curves at different temperatures.
10.18721/JPM.173.236
621.383.525
metamorphic buffer layers
infrared photodetectors
molecular beam epitaxy
https://physmath.spbstu.ru/article/2024.76.36/
CNF
RUS
187-191
Saratov State University
Kozlowski
Alexander
kozlowsky@bk.ru
Saratov, Russian Federation
0000-0001-6780-9865
Volkovoynova
Larisa
0000-0003-3281-8352
Saratov State University
Serdobintsev
Alexey
alexas80@bk.ru
Saratov, Russian Federation
Electrical characteristics of semiconductor film structures obtained on a flexible substrate
In the frame of this work the current-voltage characteristics of thin films of polycrystalline silicon on a flexible polymer substrate were studied, measured when the film was bent in both tension and compression modes. The samples were fabricated by laser-stimulated metal-induced crystallization of amorphous Si films, deposited by magnetron sputtering on a flexible polyimide film both in constant power and pulsed mode. It has been established that the resistance of a polycrystalline Si film depends on the degree and type of deformation. The change in electrical resistance can be associated with an increase and decrease in the intergranular distance when the film is stretched and compressed, respectively. The resulting films are promising for the fabrication of semiconductor strain sensors and active elements of flexible electronics.
10.18721/JPM.173.237
539.23
сrystallization of amorphous silicon
metal-induced crystallization
laserstimulated crystallization
infrared laser radiation
flexible electronics
https://physmath.spbstu.ru/article/2024.76.37/
CNF
RUS
192-195
0009-0009-7765-2609
Gribovskaya
Olga
fen.tefal2@gmail.com
Sharkova
Natalia
nasharkova@stud.etu.ru
Vasilieva
Anastasia
anastasiastru@mail.ru
Parfenov
Vadim
vadim_parfenov@mail.ru
The use of Raman and laser-induced breakdown spectroscopy for the study of iron-containing inks
The paper presents experimental results of combined use of Raman and laserinduced breakdown spectroscopy (LIBS) for determining elemental composition of ironcontaining inks. It was shown that proposed approach allows to solve the problem of ironcontaining components identification for paper artifacts.
10.18721/JPM.173.238
621.373.826
iron gall ink
Raman spectroscopy
laser-induced breakdown spectroscopy
LIBS
chemical composition analysis
https://physmath.spbstu.ru/article/2024.76.38/
CNF
RUS
196-200
Novosyolov
Artyom
sir.nowosiolov@yandex.ru
Sanatulina
Arina
sanatulina.af@phystech.edu
Moscow Institute of Physics and Technology (National Research University)
Vershinina
Olesya
seraia.ov@phystech.edu
Dolgoprudny, Moscow region, Russian Federation
Moscow Institute of Physics and Technology (National Research University)
Lizunova
Anna
anna.lizunova@gmail.com
Dolgoprudny, Moscow region, Russian Federation
0000-0002-3028-947X
Gudkova
Svetlana
Moscow Institute of Physics and Technology (National Research University)
Urazov
Maxim
urazov.mn@mipt.ru
Dolgoprudny, Moscow region, Russian Federation
Сomposition of Al/Zn nanoparticles produced in a gas discharge
In this work, we investigated the size and elemental composition of a binary of aluminum/zinc nanoparticles synthesized in a gas discharge generator. AlxZn1–x nanoparticles were produced in inert atmosphere by simultaneous erosion of aluminum hole cathode and a zinc anode. Mass fractions of aluminum x were varied from 0.05 to 0.29 by changing the surface area of the aluminum electrode. It was found that the mass fraction of aluminum in binary composition increased 2.6 times when erosion surface of the Al cathode dropped from 188.5 to 37.7 mm2. The average sizes of primary nanoparticles were in the range from 12.8 to 18.6 nm, which formed submicron agglomerates. Also, when the erosion process occurred in an air atmosphere, we produced zinc aluminate AlZn2O4 with luminescence in ultraviolet (UV) range.
10.18721/JPM.173.239
544.032
nanoparticles
zinc aluminate
size measurement
gas discharge
TEM
erosion
https://physmath.spbstu.ru/article/2024.76.39/
CNF
RUS
201-206
0000-0002-8102-3858
Baranov
Pavel
psbaranov@etu.ru
Parfenov
Vadim
vadim_parfenov@mail.ru
Rongonen
Sofia
sofiagonobobleva@mail.ru
Sokolov
Nikita
niksokolov2001@mail.ru
Identification of unreadable marginalia by means of hyperspectral imaging: case study of the Ostrog Bible from the Library of Russian Academy of Sciences and Russian National Library
Experiments on visualization of unreadable manuscript marginalia (fading of ink, spreading of ink, crossed out ink, scraping of ink, gluing with restoration materials) of several copies of the Ostrog Bibles from the National Library of Russia and the Library of Russian Academy of Sciences using hyperspectral imaging have been conducted. The aim of work was to find a way using advanced opto-electronic techniques to read invisible marginalia. In experiments NIR hyperspectral camera operating in the range 400–1100 nm and original self-developed software were used. Marginalia have been visualized by means of hyperspectral imaging that made possible to recognize badly visible texts and bring new information for art historians.
10.18721/JPM.173.240
621. 397
hyperspectral imaging
unreadable marginalia
Ostrog bible
manuscript
cultural heritage
opto-electronic techniques
https://physmath.spbstu.ru/article/2024.76.40/
CNF
RUS
207-211
0000-0002-6247-9868
Mastalieva
Viktoriia
strindberg76@mail.ru
Alferov University
Neplokh
Vladimir
vneplox@gmail.com
St. Petersburg, Russian Federation
Aybush
Arseny
aiboosh@gmail.com
Stovpiaga
Ekaterina
kattrof@gvg.ioffe.ru
Eurov
Daniil
edan@mail.ru
Peter the Great St. Petersburg Polytechnic University
Vinnichenko
Maxim
mvin@spbstu.ru
Peter the Great St. Petersburg Polytechnic University
Karaulov
Danila
karaulov.da@edu.spbstu.ru
St. Petersburg, Russian Federation
0000-0002-1571-209X
ITMO University
Kirilenko
Demid
demid.kirilenko@mail.ioffe.ru
St. Petersburg, Russian Federation
0000-0003-2956-6561
Golubev
Valery
golubev@gvg.ioffe.ru
Ioffe Institute
Smirnov
Alexander
Alex.Smirnov@mail.ioffe.ru
St. Petersburg, Russian Federation
0000-0002-9257-6183
Makarov
Sergey
s.makarov@metalab.ifmo.ru
Ioffe Institute
Kurdyukov
Dmitry
kurd@gvg.ioffe.ru
St. Petersburg, Russian Federation
0000-0001-9792-045X
Peter the Great St. Petersburg Polytechnic University
Mukhin
Ivan
muhin_is@spbstu.ru
Nonlinear optical phenomena in mesoporous SiO2 and Si/SiO2 nanoparticles
In this work we study the optical response of mesoporous SiO2 and Si/SiO2 nanoparticles considering different fabrication and post-synthesis treatment processes. We show that thermal annealing of mesoporous Si/SiO2 nanoparticles transforms the Si phase from amorphous to crystalline and enhances the second harmonic generation response.
10.18721/JPM.173.241
548.75
second harmonic generation
silicon
nanostructures
mesoporous nanoparticles
IR visualizer
https://physmath.spbstu.ru/article/2024.76.41/
CNF
RUS
212-216
Melnichenko
Ivan
imelnichenko@hse.ru
0000-0003-3686-935X
National Research University “Higher School of Economics” (St. Petersburg branch)
Moiseev
Eduard
emoiseev@hse.ru
Ivanov
Konstantin
kivanov@hse.ru
Kryzhanovskaya Natalia V.
Natalia
nkryzhanovskaya@hse.ru
Vainilovich
Alexey
a.vainilovich@ifanbel.bas-net.by
Nahorny
Aliaksey
a.nahorny@ifanbel.bas-net.by
Lutsenko
Eugeniy
e.lutsenko@ifanbel.bas-net.by
35379962200
Ioffe Physical Technical Institute of the Russian Academy of Sciences
Zhukov
Alexey
zhukov@beam.ioffe.ru
Russia, 194021, St.Petersburg, Polytechnicheskaya 26
Mode leakage into substrate in microdisk lasers
The propagation of whispering gallery modes of a quantum-dot injection disk laser into a GaAs substrate has been investigated experimentally and using simulation. For a 50 μm diameter microlaser with 1.5-μm-thick Al0.4Ga0.6As claddings, the intensity of the mode leaking into the substrate can be up to 10–3 of the intensity of the laser mode in the waveguide.
10.18721/JPM.173.242
621.373.826
InGaAs quantum well-dots
whispering gallery mode microlasers
mode leakage
https://physmath.spbstu.ru/article/2024.76.42/
CNF
RUS
217-220
Reutov
Aleksei
aleksey.reutov@phystech.edu
Babukhin
Danila
dv.babukhin@gmail.com
Sych
Denis
denis.sych@gmail.com
Convolutional neural networks for image-free classification via single-pixel imaging
The technology of single-pixel imaging extends visualization capabilities beyond pixel-matrix-based devices. One of possible applications for this technology is fast classification of objects without the need for reconstruction of an image. The single-pixel camera gathers light statistics and then a computational algorithm – such as a neural network – decides on what is the object been illuminated. We train a convolutional neural network on simulated data from single-pixel camera and demonstrate effectiveness of classification images of handwritten digits.
10.18721/JPM.173.243
528.854
single-pixel imaging
convolutional neural networks
image-free classification
https://physmath.spbstu.ru/article/2024.76.43/
CNF
RUS
221-224
Kashapov
Artem
ar.kashapov@outlook.com
Bezus
Evgeni
evgeni.bezus@gmail.com
Bykov
Dmitry
bykovd@gmail.com
Doskolovich
Leonid
leonid@ipsiras.ru
Metal-dielectric resonator integrated in an asymmetric slab waveguide for spatiotemporal optical vortex generation
We theoretically and numerically demonstrate an efficient approach for generating a spatiotemporal optical vortex (STOV) in an asymmetric dielectric slab waveguide using a metal-dielectric structure constituted by several metal strips integrated into the waveguide core layer. The presented rigorous numerical simulation results fully confirm the developed theoretical model.
10.18721/JPM.173.244
535
spatiotemporal optical vortex
integrated optics
asymmetric dielectric slab waveguide
spatiotemporal differentiation
https://physmath.spbstu.ru/article/2024.76.44/
CNF
RUS
225-229
0009-0001-6814-1737
Zhurba
Danila
Parfenov
Vadim
vadim_parfenov@mail.ru
3D laser cleaning as a novel approach to artworks conservation
Until recently, restoration cleaning has been carried out primarily manually. Manual laser cleaning is a time-consuming process that requires highly skilled restorers. The introduction of automation, which increases the quality and speed of laser cleaning, will significantly expand its application range and reduce the complexity of restoration work. In this article, we present the results of our experimental work on automated 3D laser cleaning. The proposed approach allows for precise cleaning of objects of complex geometric shape under the control of a CNC machine. To remove dirt from the surface of such objects, we have developed an original approach based on a combination of three-dimensional scanning of the object and obtaining a point cloud of the surface to be cleaned, creating a control program for surface cleaning on a CNC machine. The demonstration of the automated cleaning process took place on corroded steel samples of complex geometric shape. A fiber ytterbium pulsed laser with an average power of 100 W with a wavelength of 1.06 microns and a pulse duration of 100 ns was used for cleaning.
10.18721/JPM.173.245
535.211
laser cleaning
fiber nanosecond laser
conservation
artworks
CNC
3D scanner
https://physmath.spbstu.ru/article/2024.76.45/
CNF
RUS
230-235
Dedkov
Evgeniy
dedkov.ea@phystech.edu
Shakhovoy
Roman
r.shakhovoy@goqrate.com
Security of BB84-like protocol on coherent states with different intensities
There are a large variety of quantum key distribution (QKD) protocols, which can provide unconditional security even with practically possible coherent states instead singlephoton ones. Most of them require equal intensities of states emitted, which can be achieved only with some precision. However, in some state preparation schemes, for example, in those based on optical injection, equal intensities cannot be achieved without additional elements, which increases the cost and complexity of QKD setup. In this work we analyze the influence of different state intensities on achievable secret key rate in classical BB84 scheme.
10.18721/JPM.173.246
53
quantum key distribution
BB84
coherent pulses with random phases
decoy state
https://physmath.spbstu.ru/article/2024.76.46/
CNF
RUS
236-240
0000-0002-3947-8648
Alferov University
Solomonov
Nikita
St. Petersburg, Russian Federation
Lebedev
Denis
denis.v.lebedev@gmail.com
0000-0001-8440-494X
Alferov University
Novikova
Kristina
novikova_k@spbau.ru
St. Petersburg, Russian Federation
0000-0001-7521-3754
Alferov University, RAS
Fedina
Sergey
fedina.serg@yandex.ru
Alferov University
Vaulin
Nikita
nikitavaylin@mail.ru
St. Petersburg, Russian Federation
0000-0002-4172-940X
Alferov University
Dvoretckaia
Liliya
0000-0002-3321-7797
Peter the Great St. Petersburg Polytechnic University
Arkhipov
Alexander
arkhipov@rphf.spbstu.ru
Golubok
Alexander
aogolubok@mail.ru
0000-0001-9792-045X
Peter the Great St. Petersburg Polytechnic University
Mukhin
Ivan
muhin_is@spbstu.ru
Luminescence enhancement in inelastic tunnelling of electrons by changing the geometry of the tunnelling contact
We have experimentally investigated the light emission resulting from inelastic electron tunneling in the transition with hemispherical gold nanoantennas (d = 400 nm, h = 300 nm) created by direct fs-laser ablation. We found two characteristic modes of luminescence: standard - increased signal is observed in the region of nanoantennas at tunneling currents below 2.25 nA and inverted-anomalous, where the gold surface is mainly luminescent, while dark spots are observed on the antennas on the contrary. In the inverted-anomalous mode we observe record signal values of 5·104 photons per second. We attribute the anomalous effect to the realization of a conditionality for resonant tunneling of electrons with excitation of optical states.
10.18721/JPM.173.247
620.3
golden nanoantenna
femtosecond laser printing
nanoscale on-chip light sourse
luminescence from tunnel junction
inelastic tunneling of electrons
resonant electron tunneling
scanning tunneling microscope
https://physmath.spbstu.ru/article/2024.76.47/
CNF
RUS
241-245
0000-0001-6494-0147
Moscow Pedagogical State University
Shein
Kirill
Moscow, Russian Federation
Lyubchak
Anastasia
anlyubchak@miem.hse.ru
Zharkova
Ekaterina
zharkovaev.sci@gmail.com
Bandurin
Denis
bandurin.d@gmail.com
Charaev
Ilya
ilyacharaev@gmail.com
0000-0003-2560-6503
National Research University “Higher School of Economics”
Gayduchenko
Igor
igaiduchenko@hse.ru
Moscow, Russian Federation
Goltsman
Grigory
goltsman@rplab.ru
Towards the realization of NbSe2 NIR photodetectors integrated on a silicon nitride waveguide
Photonic integrated circuits (PIC) represent a promising platform for applications in the field of quantum technologies, such as quantum computing and cryptography. One of the key components for these applications is detectors based on thin superconducting films. Nevertheless, fabricating thin detectors atop a waveguide utilizing conventional superconducting materials acquired through magnetron sputtering presents a multifaceted and cost-intensive technological challenge. As an alternative approach in this study, we present the concept of an on-chip superconducting detector based on the two-dimensional superconductor NbSe2, obtained through mechanical exfoliation. The advantage of this approach lies in the ease of device integration onto the waveguide and the possibility to create a detector with a thickness of just one atomic layer. We also demonstrated a method to fabricate thin superconducting nanowires from this material, as the ability to precisely structure the material is crucial for the development of on-chip detectors.
10.18721/JPM.173.248
538.9
2D materials
PIC
superconducting electronics
superconductors
https://physmath.spbstu.ru/article/2024.76.48/
CNF
RUS
246-250
Astafiev
Oleg
O.Astafiev@skoltech.ru
Shakhov
Aleksander
physics2007@yandex.com
Syrchina
Maria
wrongclue@gmail.com
Nadtochenko
Victor
nadtochenko@gmail.com
Fluorescent cell imaging with femtosecond laser pulses-produced protein nanoaggregates
We demonstrated formation of fluorescent products from model protein - bovine serum albumin, induced by femtosecond laser irradiation and characterized optical properties of these products. Laser-modified BSA showed relative biocompatibility and can be employed for cell imaging.
10.18721/JPM.173.249
544.536
proteins
femtosecond laser pulses
nanomaterials
fluorescence
bioimaging
https://physmath.spbstu.ru/article/2024.76.49/
CNF
RUS
251-255
0009-0005-6836-4091
Mikhaylov
Oleg
oleg.mikhaylov.00@gmail.com
0000-0002-4894-6503
Alferov University
Baranov
Artem I.
baranov_art@spbau.ru
St. Petersburg, Russian Federation
0000-0002-0061-6687
Alferov University
Uvarov
Alexander
lumenlight@mail.ru
0000-0002-3503-7458
St. Petersburg Electrotechnical University "LETI"
Maksimova
Alina A.
deer.blackgreen@yandex.ru
0000-0001-6869-1213
Alferov University
Vyacheslavova
Ekaterina
cate.viacheslavova@yandex.ru
0000-0002-7632-3194
Alferov University
Gudovskikh
Alexander
gudovskikh@spbau.ru
Shvarts
Maxim
Shvarts M.Z.
0000-0002-5226-1101
Ioffe Institute
Terukov
Evgenyi
eug.terukov@mail.ioffe.ru
St. Petersburg, Russian Federation
Degradation of solar heterostructured cells under the influence of electron flow
In this work, we study the effect of irradiation as in low Earth orbits on heterojunction technology structures (p)a-Si:H/(n)c-Si. The samples were irradiated with an electron beam with an energy of 2 MeV and fluences of 3·1013cm–2 to 3·1015cm–2. Solar cells performance deteriorate with increasing of fluence due to decrease of lifetime of charge carriers in bulk silicon. According to DLTS measurements, three defects with activation energies of 0.18 eV, 0.25 eV and 0.43 eV were detected, and their nature was identified. Further, the concentrations of the found defects were analyzed, during which it became clear that the concentration of defects decreases with increasing depth of the investigated structure. The correlation between fluence and concentration is also visible. The average values of concentrations vary from 1012 to 1014.
10.18721/JPM.173.250
08.1; 08.2; 08.3
HJT solar cells
DLTS
defects
concentration
absorption cross-section
https://physmath.spbstu.ru/article/2024.76.50/
CNF
RUS
256-261
0009-0000-4342-766X
Deng
Yuanbiao
dyuanbiao@gmail.com
Davydov
Vadim
davydov_vadim66@mail.ru
Photovoltaic potential in the Subarctic region
With the world’s policy support for solar energy and other renewable energy sources, solar photovoltaic technology has seen rapid development. However, from Saint Petersburg’s perspective, generating solar photovoltaic (PV) energy in a Subarctic setting is hindered by several challenges, which diminish the enthusiasm for its adoption. Our work demonstrates that St. Petersburg is capable of generating more solar photovoltaic energy in summer than Central Europe, East and Southeast Asia. This finding could enhance our understanding of the seasonal and annual potential of solar PV energy in Subarctic region.
10.18721/JPM.173.251
53.04
solar energy
climatic
Subarctic
photovoltaic potential
https://physmath.spbstu.ru/article/2024.76.51/
CNF
RUS
262-265
Toikka
Andrei
atoikka@obraz.pro
Kamanina
Natalia
nvkamanina@mail.ru
Surfaces modifications in functional layers for liquid crystal devices
In the current research, the influence of the single-walled carbon nanotubes (CNTs) on the alignment and anti-reflective properties of the indium-tin oxides (ITO) was considered. The formation of the composite thin films based on ITO with CNTs was provided by the laseroriented deposition with the CO2 laser. The average electrical strength during the deposition of the CNTs varied in the range of 100–600 V/cm. Morphology of the structures compared via the surface free energy (SFE) with the Owens-Wendt method. Optical properties of the ITO modifications were compared by the ellipsometry via the Lorentz model using. According to comparison, deposited CNTs provide the reduce of the polar component of SFE caused by the surface passivation and to rise of the dispersive component of SFE caused by an impact of the Van der Waals forces. Moreover, based on the refractive index comparison, CNTs lead to the decrease of the reflection losses between ITO and the liquid crystal mesophase. Thus, the transparent contacts based on ITO with CNTs could be considered as the tunable alignment and the antireflection layers of the nematic liquid crystal devices, so, the architecture of the related devices could be simplified.
10.18721/JPM.173.252
535.016
liquid crystals
alignment
indium tin oxides
carbon nanotubes
laser-oriented deposition
https://physmath.spbstu.ru/article/2024.76.52/
CNF
RUS
266-270
Gulyaeva
Irina
tenirka@mail.ru
0000-0003-3725-6053
Petrov
Viktor
vvpetrov@sfedu.ru
Bayan
Ekaterina
ekbayan@sfedu.ru
Tolstyak
Gleb
tolstiak@sfedu.ru
Surface properties of tin dioxide films containing 7–10% La3+
In this work, morphological, hydrophobic, electrophysical properties and roughness of tin dioxide films containing 7–10% La3+ were investigated by X-ray phase analysis, measuring the edge angle of wettability, atomic force microscopy and Kelvin-probe force microscopy. The obtained materials were thin films formed by nanocrystallites with dimensions of 23–26 nm and have a homogeneous coating with small height differences. ByX-ray phase analysis it was found that the films are composite and consist of tetragonal SnO2 (cassiterite) and La2O3 phases. The dependence of the edge angle of wettability on the content of lanthanum ions, substrate material, as well as on the morphology of the surface and the magnitude of the surface charge was established. It is shown that the 10% La3+–SnO2 film on polycore has the highest hydrophobic properties. Measurements of the surface potential by Kelvin-probe microscopy showed that the average charge on the surface of the film containing 10% La3+ is two times lower than that of the film containing 7% La3+.
10.18721/JPM.173.253
546.814-31
tin dioxide
lanthanum
cassiterite
hydrophobic properties
https://physmath.spbstu.ru/article/2024.76.53/
CNF
RUS
271-274
Isokjanov
Shakhboz
isakjanov2997@gmail.com
0000-0003-3135-2634
Mazin
Eugeniy
mazin.ev@mipt.ru
0000-0002-2247-9388
Krivetskiy
Valeriy
krivetskii.vv@mipt.ru
Silicon/graphite nanocomposite for lithium-ion battery anode
One of the most promising areas of battery improvement is the use of silicon in anodes. It has emerged as a promising candidate for next-generation lithium-ion batteries (LIBs) due to its tenfold higher capacity compared to traditional graphite anodes (4200 mAh∙g–1 vs. 372 mAh∙g–1). However, the practical application of silicon in LIBs is hindered by several challenges, including rapid capacity fading, unstable cycling behavior, and significant volume expansion during lithium insertion/extraction. This work presents a novel approach for fabricating high-performance LIBs with silicon-based anodes and metallic lithium counter electrodes in a compact “Cell-coin 2032” form factor. The silicon-containing anode material was synthesized via the thermal decomposition of SiH4 in a gas phase followed by deposition onto a carbon matrix. A doctor blade technique was employed to deposit the composite onto a copper foil current collector. Laser engraving was utilized to define the electrode topology. The developed technology enables the production of compact, planar LIBs suitable for a wide range of electronics applications.
10.18721/JPM.173.254
621.355.9
lithium-ion batteries
silicon-carbon anodes
composite electrodes
laser engraving
doctor blade technique
coin-type cells
solid electrolyte interphase (SEI)
https://physmath.spbstu.ru/article/2024.76.54/
CNF
RUS
275-278
Nikitina
Ekaterina
mail.nikitina@mail.ru
0000-0003-1835-1629
Alferov University
Shubina
Kseniia
rein.raus.2010@gmail.com
St. Petersburg, Russian Federation
0000-0001-8629-2064
Alferov University
Sobolev
Maxim
St. Petersburg, Russian Federation
Alferov University
Pirogov
Evgeny
zzzavr@gmail.com
St. Petersburg, Russian Federation
Study of GaPN(As) layers grown by molecular beam epitaxy on silicon substrates
In this work bulk layers of GaPN(As) solid solutions grown by plasma assisted molecular beam epitaxy on gallium phosphide and silicon substrates are studied. The morphology, structural and optical properties of diluted nitride epilayers synthesized on GaP and Si are compared. The possibility of obtaining GaPN(As) epitaxial layers of optical quality on lattice-mismatched silicon substrates is demonstrated.
10.18721/JPM.173.255
621.315.592
dilute nitride semiconductors
molecular beam epitaxy
silicon
gallium phosphide
https://physmath.spbstu.ru/article/2024.76.55/
CNF
RUS
279-282
0009-0009-4023-6185
Alferov University
Pozdeev
Vyacheslav
pozdeev99va@gmail.com
St. Petersburg, Russian Federation
0000-0002-0061-6687
Alferov University
Uvarov
Alexander
lumenlight@mail.ru
0000-0002-7632-3194
Alferov University
Gudovskikh
Alexander
gudovskikh@spbau.ru
0009-0009-7051-8458
Alferov University
Monastyrenko
Anatoliy
St. Petersburg, Russian Federation
Effect of surfactants on surface tension of PEDOT:PSS aqueous solution
This article examines the effect of surfactant content on the surface tension of a PEDOT:PSS solution to determine the possibility of coating substrates with different values of critical surface tension. One of the disadvantages of applying PEDOT:PSS coatings from an aqueous solution (e.g. spin-coating) is that water has a relatively high surface tension, which leads to poor wettability of substrates with a low critical surface tension.
10.18721/JPM.173.256
532.61.08
PEDOT:PSS
surface tension
conductive polymer
surfactants
Triton X-100
https://physmath.spbstu.ru/article/2024.76.56/
CNF
RUS
283-287
Parshin
Bogdan
parshbgal@bmstu.ru
Bauman Moscow State Technical University
Makeev
Mstislav
m.makeev@bmstu.ru
Moscow, Russian Federation
0000-0003-0672-4627
Mikhalev
Pavel
pamikhalev@bmstu.ru
Sviridyuk
Denis
sviridyuk@bmstu.ru
Effect of functional sublayers on the characteristics of deposited diamond-like carbon coatings
DLC coatings deposited by the PLD method were investigated using Raman spectroscopy, spectrophotometry and atomic force microscopy. The influence of the material of the functional sublayers used (Ti, Cr) on the structural and optical characteristics, as well as the surface condition of the deposited DLC coatings, was studied.
10.18721/JPM.173.257
539.21
diamond-like carbon
functional sublayers
sp2-hybridization
sp3-hybridization
atomic force microscopy
spectrophotometry
Raman spectroscopy
https://physmath.spbstu.ru/article/2024.76.57/
CNF
RUS
288-291
0000-0003-1556-7635
Vodyashkin
Andrey
av.andrey2013@yandex.ru
0000-0003-0672-4627
Mikhalev
Pavel
pamikhalev@bmstu.ru
Bauman Moscow State Technical University
Makeev
Mstislav
m.makeev@bmstu.ru
Moscow, Russian Federation
Green synthesis of titanium dioxide nanoparticles suitable for creating PVDF-TiO2 composite films
This work presents a green method for producing titanium dioxide nanoparticles. The resulting nanoparticles were characterized using DLS, XRD, FTIR. The resulting nanoparticles consist of an anatase phase with small impurities of brookite and an amorphous phase associated with organic substances of the extract. Titanium nanoparticles exhibit high colloidal stability induced by rosehip extract. Due to their high colloidal stability, the nanoparticles proposed in this work are a promising resistor as one of the components for tuning the properties of hybrid materials in the PVDF matrix.
10.18721/JPM.173.258
544.774.4
nanoparticles
TiO2
PVDF
composite materials
dynamic light scattering
green synthesis
https://physmath.spbstu.ru/article/2024.76.58/
CNF
RUS
292-296
Zaichenko
Kirill
kvz235@mail.ru
Afanasenko
Arseniy
ar.afanasenko@gmail.com
Denisova
Elena
Tiranderel@yandex.ru
Kordyukova
Anna
annygm00@mail.ru
Sevakov
Daniil
sevakovdaniil@gmail.com
Utilizing the convolutional neural network AlexNet to classify ultra-high resolution electrocardiosignals
Coronary heart disease is one of the main causes of death in humans. Despite this, modern electrocardiography (ECG) methods are limited in obtaining complete information about the progression of pathology due to insufficient throughput. To eliminate this limitation, a new approach known as ultra-high resolution electrocardiography (UHR ECG) is being developed to detect abnormal changes in the cardiovascular system in areas of electrocardiosignal processing (ECS), which are usually perceived as artifacts. However, the expansion of the amplitude and frequency range complicates the task of analyzing the data obtained, since many traditional ECS analysis methods are ineffective when applied to UHR ECG. This study demonstrates the effectiveness of using the fifteen-layer convolutional neural network (CNN) AlexNet to solve the problem of classifying ECS obtained using the UHR ECS methodology. An extensive data set of labeled ECG recordings obtained using the UHR ECG method on Vistar series experimental rats during experiments on modeling acute myocardial ischemia was used to train and evaluate the quality of predictions of the CNN model.
10.18721/JPM.173.259
004.622
ultra-high resolution electrocardiography
convolutional neural network
classify
AlexNet
ischemia
electrocardiosignal
coronary heart disease
https://physmath.spbstu.ru/article/2024.76.59/
CNF
RUS
297-300
Sidorov
Evgeniy
siea.18@uni-dubna.ru
Gribova
Elena
elena_g67@mail.ru
Gladyshev
Pavel
pglad@yandex.ru
Fluorescent properties of boron nitride quantum dots depending on functionalizing ligands
Boron nitride quantum dots (BNQDs) are promising agents for boron neutron capture therapy. However, studies of the dependence of optical properties on the conditions of their synthesis are at an early stage. In this work, a study was carried out of the effect of BNQDs functionalization with urea, thiourea, and o-phenylenediamine on their fluorescent properties. It is shown that when N-methyl-2-pyrrolidone is used as a solvent for the synthesis of BNQDs by exfoliation of bulk boron nitride powder followed by solvothermal treatment with the addition of various amino-containing ligands, it is possible to tune the fluorescence of boron nitride quantum dots from 404 to 545 nm.
10.18721/JPM.173.260
54.057, 544.164, 544.174.2
quantum dots
boron nitride
photoluminescence
https://physmath.spbstu.ru/article/2024.76.60/
CNF
RUS
301-305
0000-0001-8296-6172
Dushina
Anastasiya
dushina02@gmail.com
0000-0002-0332-1235
Moscow Pedagogical State University
Stepanov
Maxim
stepanov_me@mail.ru
Moscow, Russian Federation
0000-0001-9305-067X
Arzhanov
Artem
Khaydukov
Evgenii
khaydukov@mail.ru
0000-0001-9646-1693
M.M. Shemyakin and Yu.A. Ovchinnikov Institute of bioorganic chemistry of the RAS
Generalova
Alla
Moscow, Russian Federation
Conditions of AgNPs/flavin mononucleotide complex formation as a tool to tune optical properties of this complex
Recently, photodynamic therapy has been considered as one of the promising alternatives to classical antimicrobial therapy based on antibiotics, which has become less effective due to bacterial resistance. Flavin mononucleotide (FMN), a vitamin B2 derivative, is a biocompatible, affordable drug with attractive photodynamic properties, including the generation of reactive oxygen species (ROS) that can target and disrupt bacteria. The integration of silver nanoparticles, known for their antibacterial properties, could affect photochemical processes and potentially enhance the antimicrobial effectiveness of FMN. This study shows the results of an investigation into the conditions for the formation of a complex between silver nanoparticles and FMN, as well as the influence of nano-sized silver on the photodegradation of FMN under light irradiation. This work presents the development of a method aimed at preparation of FMN-silver nanoparticles complex. The influence of silver nanoparticles on the fluorescent properties of FMN and the dynamics of its photodegradation was evaluated.
10.18721/JPM.173.261
620.3
flavin mononucleotide
silver nanoparticles
photodegradation
optical properties
https://physmath.spbstu.ru/article/2024.76.61/
CNF
RUS
306-310
0009-0004-4610-4523
Suchkov
Maksim
max.suchkov3001@yandex.ru
Kuzyaeva
Valeriia
kuzyaeva.valeriya@mail.ru
Sergeev
Igor
sergeev@yandex.ru
Babayeva
Gulyalek
babaevagulyalek@gmail.com
0000-0001-6349-2979
Moscow Pedagogical State University
Demina
Polina
Moscow, Russian Federation
Sochilina
Anastasia
ddraig@yandex.ru
Akasov
Roman
roman.akasov@gmail.com
Egorova
Tatiyana
tv.egorova@mpgu.su
Khaydukov
Evgenii
khaydukov@mail.ru
0000-0001-9646-1693
M.M. Shemyakin and Yu.A. Ovchinnikov Institute of bioorganic chemistry of the RAS
Generalova
Alla
Moscow, Russian Federation
Modified natural polymers with bioactive additives for restoration of critical bone defect
A critical bone defect (CBD) is a bone tissue injury that is unable to self-heal and therefore requires tissue engineering approaches. Photocrosslinkable hydrogels based on natural polymers are promising biomaterials for CBD restoration due to their biocompatibility, versatility, and ability to form 3D structures of defined shapes. In this study, UV-photocrosslinkable materials based on hyaluronic acid modified with glycidyl methacrylate were proposed for the formation of hydrogels, which can be used for in situ replacement of CBD. It was demonstrated that the obtained hydrogels possess mechanical properties suitable for bone tissue replacement, and the photopolymerization process occurs under mild conditions, ensuring the high viability of mouse mesenchymal stem cells in such hydrogels. The developed technology may be suggested or further investigation of its potential for CBD replacement in vivo conditions.
10.18721/JPM.173.262
577.35
critical bone defect
hydrogel scaffolds
biocompatible natural polymers
hyaluronic acid
glycidyl methacrylate
in situ photocrosslinking
https://physmath.spbstu.ru/article/2024.76.62/
CNF
RUS
311-315
0000-0002-0332-1235
Moscow Pedagogical State University
Stepanov
Maxim
stepanov_me@mail.ru
Moscow, Russian Federation
0000-0003-3899-3928
Vlasov
Alexander
vlasov.sasha2015@yandex.ru
0000-0001-6349-2979
Moscow Pedagogical State University
Demina
Polina
Moscow, Russian Federation
Akasov
Roman
roman.akasov@gmail.com
Babayeva
Gulyalek
babaevagulyalek@gmail.com
0000-0001-9646-1693
M.M. Shemyakin and Yu.A. Ovchinnikov Institute of bioorganic chemistry of the RAS
Generalova
Alla
Moscow, Russian Federation
Khaydukov
Evgenii
khaydukov@mail.ru
Intravital microscopy: dorsal skinfold chamber model
Intravital microscopy (IVM) is a great tool to investigate multicellular living organism in all of its natural complexity. It combines precision of light microscopy with an ability to observe physiological processes in real-time of traditional magnetic resonance/computed tomography imaging. In this work we demonstrate effectiveness of self-engineered dorsal skinfold chamber IVM model on examples of brightfield microscopy with passive spectral filtration to study vasculature in mice.
10.18721/JPM.173.263
612.1.8
IVM
DSC
bioimaging
microcirculation
vasculature
https://physmath.spbstu.ru/article/2024.76.63/
CNF
RUS
316-320
Kharlamova
Anastasya
kharlamova.anastasya2015@yandex.ru
Scattering of ultrashort laser pulses on pseudoknots RNA
The paper theoretically models the scattering spectra of ultrashort laser pulses on an RNA pseudonode and considers the possibility of using the obtained data in genome analysis. Several configurations of pseudo-RNA nodes were selected as a sample for theoretical modeling of the interaction of a laser pulse with matter: a hairpin, a double loop, and a spiral junction. The study of such structures is interesting for the analysis of the DNA genome, as well as for the study of functions such as viral replication, RNA splicing and RNA editing. At the moment, the study of such structural features is difficult, existing methods cannot give an accurate result, especially on long sections of the molecule. In this paper, the interaction of an ultrashort laser pulse with a molecule of four variants is theoretically modeled, when the RNA does not have a pseudonode and when there are hairpins and loops in the structure. The results obtained show the expediency of using laser pulses as a method for determining such structures.
10.18721/JPM.173.264
539.192
ultrashort laser pulses
scattering spectrum
pseudoknots
DNA
RNA
https://physmath.spbstu.ru/article/2024.76.64/
CNF
RUS
321-325
Vakorina
Daria
cementary.ley@gmail.com
Stepanenkov
Gregory
261199g@gmail.com
Express kidney monitoring method for early detection of kidney damage
A new method for monitoring the state of urine has been developed, which allows to determine the density ρm, osmolarity Os and the size of protein compounds Db in real time with high accuracy. Modernization of the mobile refractometer design to implement this method to provide measurement of biological solution sample parameters with a single instrument. Providing ease of operation and maintenance, high accuracy of measurements, application without pre-calibration of the scale after each switching on. The results of determination of density, osmolarity, size of protein compounds and total number of solid particles by measured refractive indices n at different wavelengths were compared with the results of measurements on other devices and confirmed the reliability of the developed method. The parameters of human urine, by which it is possible to establish kidney disease at an early stage with high probability, were determined.
10.18721/JPM.173.265
53.082.539
refraction
express method
refractive index
laser radiation
wavelength
urine
https://physmath.spbstu.ru/article/2024.76.65/
CNF
RUS
326-330
Dmitrieva
Diana
dmitrievadiana1405@gmail.com
0009-0005-8032-1561
Dmitrieva
Diana
Development of a new methodology for the control of tritium emissions into the atmosphere and assessment of their impact on biological objects
The necessity of research of tritium content in emissions produced by nuclear power plants is sustained. The imperfection of the classical method for the determination of tritium in a sample by the presence of β-radiation in the research of water, soil and products is determined. The methodology of measurements is presented. To realize the proposed method, measurements of radiation power from three types of particles (α, β and γ) are carried out. Repeated measurements are carried out at a small distance from the sample at a more distant distance the exposure dose from γ-radiation was measured. The results of the research of tritium impact on the population in the Leningrad Region (Russian Federation), which lives in areas up to 50–60 km away from the Leningrad Nuclear Power Plant, are presented. Annual emissions and volumetric activity in air of tritium at the Leningrad Nuclear Power Plant are presented. Data on annual radiation dose from tritium emissions are given. Negative consequences of tritium influence on human organism are highlighted. The drawbacks of the existing monitoring system are identified.
10.18721/JPM.173.266
539.1.047
methodology
tritium emissions
γ-radiation
tritium impact
control system
https://physmath.spbstu.ru/article/2024.76.66/
CNF
RUS
331-335
Fedotova
Elisaveta
st077318@student.spbu.ru
Paston
Sofia
svpaston@list.ru
Structure of bovine serum albumin in solution and films as revealed from vibrational spectroscopy
This study explores the impact of salt concentration and the degree of hydration on the structure of bovine serum albumin (BSA) using vibrational spectroscopy methods, specifically Fourier transform infrared spectroscopy and Raman scattering. BSA, a key plasma protein, plays essential roles in binding and transporting various molecules in the bloodstream. The research focuses on understanding how do the interaction with ions and water molecules affect the secondary and tertiary structure of globular proteins, emphasizing the significance of environmental factors in protein conformation. The results indicate distinct responses in the vibrational spectra of BSA to the presence of salt. Analysing the Amide I band give the parameters of the secondary structure of BSA. In all systems investigated the values obtained is in good correspondence with the data for native BSA, but the secondary and tertiary BSA structure in dehydrated films containing NaCl is closer to native, hence ions prevent albumin from denaturation and β-aggregation.
10.18721/JPM.173.267
577.322
bovine serum albumin
protein film
Raman spectroscopy
FTIR spectroscopy
https://physmath.spbstu.ru/article/2024.76.67/
CNF
RUS
336-339
Shram
Polina
p.schram2002@gmail.com
Kolchenko
Anna
anya.kolchenko@gmail.com
Akasov
Roman
roman.akasov@gmail.com
Vinokurov
Ivan
Egorova
Tatiyana
tv.egorova@mpgu.su
Antibacterial properties of riboflavin under photodynamic exposure in a culture of fluorescent bacteria E. Coli
Nosocomial infections are a dangerous complication of various surgical procedures or injuries because the pathogens causing them are resistant to antibiotic therapy. Antibacterial photodynamic therapy (aPDT), which is based on the suppression of the growth of pathogenic microorganisms by means of free radicals and reactive oxygen species generated by the irradiation of substances with photosensitising activity, can be an effective method for the treatment of nosocomial infections. In this work, we have shown that the endogenous photosensitiser riboflavin, which has low dark toxicity, good water solubility and high quantum yield, can be used as an agent for aPDT. To this end, we investigated the antibacterial activity of riboflavin against E.Coli bacteria transformed with the mKate protein using blue and near-ultraviolet light sources in different irradiation modes. It was shown that half-maximal inhibition of bacterial growth could be achieved at concentrations of 0.1–0.5 mg/ml riboflavin when irradiated at a wavelength of 365 nm and at 0.6–1.2 mg/ml when irradiated at a wavelength of 450 nm, 10–20 minutes of irradiation. The proposed approach may be promising for the treatment of nosocomial infections, including those resistant to antibiotics.
10.18721/JPM.173.268
57.083
antimicrobial photodynamic therapy
photosensitizer
riboflavin
antibiotic resistance
https://physmath.spbstu.ru/article/2024.76.68/
CNF
RUS
340-344
Burtsev
Vladimir
burtsev.vd@phystech.edu
Nikulin
Anton
nikulin.av@mipt.ru
Vosheva
Tatyana
Vosheva.ts@mipt.ru
Nazarov
Natanil
nazarov.nm@mipt.ru
Filonov
Dmitry
dimfilonov@gmail.com
Möbius strip inspired design of a multiband dipole-like circularly polarized antenna
This paper describes the design of a multi-band antenna with a dipole-like radiation pattern with circular polarization inspired by the Möbius strip. The results obtained can be applied further in telecommunication technologies, for example, in the development of satellite multiple access systems with frequency division of channels.
10.18721/JPM.173.269
537.862
Möbius strip
antenna design
multipolar decomposition
satellite communications systems
https://physmath.spbstu.ru/article/2024.76.69/
CNF
RUS
345-348
Nikulin
Anton
nikulin.av@mipt.ru
Burtsev
Vladimir
burtsev.vd@phystech.edu
Antoshkin
German
antoshkin.gv@mipt.ru
Prokhorov
Sergey
prokhorov.sy@roscosmos.ru
Vosheva
Tatyana
Vosheva.ts@mipt.ru
Nazarov
Natanil
nazarov.nm@mipt.ru
Kosmynin
Alexey
alekseykosmynin@matrixwave.tech
Filonov
Dmitry
dimfilonov@gmail.com
Development of a Ku-band phased array antenna for satellite communication
This study explores the development of phased array antennas for satellite communications in the Ku-band. The design approach focused on patch antennas with directors, utilizing circular polarization for effective beam steering. This study provides insights into the design and performance of phased array antennas, offering a solid foundation for further exploration and development in satellite communication technologies.
10.18721/JPM.173.270
537.86
phased array
Ku-band
electronic beam scanning
electromagnetic simulations
https://physmath.spbstu.ru/article/2024.76.70/
CNF
RUS
349-353
Sedov
Artem
sedov.ap@mipt.ru
Burtsev
Vladimir
burtsev.vd@phystech.edu
Nikulin
Anton
nikulin.av@mipt.ru
Khudykin
Anton
khudykin.aa@mipt.ru
Vosheva
Tatyana
Vosheva.ts@mipt.ru
Filonov
Dmitry
dimfilonov@gmail.com
Surface roughness modeling for extremely high frequency applications
In this work, we show electromagnetic simulations of surface roughness in multiple conventional antennas applicable for 6G networks potentially operating in the W-band (75–110 GHz). Operations at such high frequencies require fine accuracy of surface processing that becomes to the order of the wavelength. We show simulations of the surface roughness of four devices, such as a horn antenna, a patch antenna, a rectangular waveguide, and a microstrip transmission line. Finally, we simulated S-parameters and conducted statistical analysis to define the requirements of surface processing.
10.18721/JPM.173.271
537.86
extremely high frequency
surface roughness
electromagnetic simulations
https://physmath.spbstu.ru/article/2024.76.71/
CNF
RUS
354-359
0009-0003-7927-2171
Kozhukhovsky
Alexey
akozhukhovsky@icloud.com
Seliverstov
Sergey
seliverstovsv@mail.ru
Svyatodukh
Sergey
sergey.svetodux@gmail.com
Goltsman
Grigory
goltsman@rplab.ru
Terahertz integrated H-plane bend: simulation and experimental investigation
The usefulness of using terahertz radiation has been proven in practice. Recently we have studied how to manufacture and use silicon waveguides and obtained insignificant signal loss. Final purpose is creating the integrated photonic circuit which needs not only straight waveguide sections, which we have done before, but bend structures with minimal signal loss, which we present in this paper. The insertion loss of the structure we made is ~0.178 dB ± 0.081 dB at frequency of 145.5 GHz. This result is simulated and experimentally verified. This once again proves that it is possible to create a full-fledged design that has a lot of practical applications. It is a future of communication systems, medicine and artificial intelligence development. Eventually we will be able to create a physical structure that will be a hardware implementation of an artificial neural network with extremely low power consumption.
10.18721/JPM.173.272
537.876.4
terahertz photonics
waveguide
photonic integrated circuit
H-plane bend
https://physmath.spbstu.ru/article/2024.76.72/
CNF
RUS
360-363
ITMO University
Rozenblit
Alina
alina.rozenblit@metalab.ifmo.ru
St. Petersburg, Russian Federation
0000-0002-3337-395X
Kurganov
Georgiy
georgiy.kurganov@metalab.ifmo.ru
0000-0003-4930-1552
Zhirihin
Dmitry
d.zhirihin@metalab.ifmo.ru
ITMO University
Olekhno
Nikita
nikita.olekhno@metalab.ifmo.ru
St. Petersburg, Russian Federation
Edge states supported by two-dimensional square-lattice arrays of bianisotropic dielectric resonators
Robust wave propagation along the boundaries of two-dimensional structures at frequencies of bulk bandgap is the subject of active study and is typically related to topological properties. Here, we propose a new model of two-dimensional (2D) structure which is composed of centimeter-scale bianisotropic dielectric resonators placed in the nodes of a square lattice and supports edge states at microwave frequencies. As we demonstrate, bianisotropy introduced by breaking a geometrical symmetry of cylindrical resonators is essential for the bandgap opening. The simulation results for a finite structure demonstrate the emergence of in-gap edge states at the interface between the domains with oppositely oriented bianisotropic resonators. We numerically demonstrate spin-momentum locking for these modes, and, moreover, the emergence of such edge states at the boundary between the structure and free space, which is unusual for photonic topological insulators. The resilience of the observed states is confirmed by studying the system with double-bend interface and geometrical imperfections.
10.18721/JPM.173.273
535.3
edge states
bianisotropy
dielectric resonators
radiophysics
https://physmath.spbstu.ru/article/2024.76.73/
CNF
RUS
364-367
0000-0002-4635-0044
Morozov
Mikhail
mikhail.yu.morozov@gmail.com
0000-0002-0724-6391
Mashinsky
Konstantin
konstantin-m92@yandex.ru
0000-0003-1303-6443
Popov
Vyacheslav
Terahertz amplification and lasing in a metal groove with population inverted graphene
Terahertz amplification and lasing regimes in a metal groove with population inverted (active) graphene are studied theoretically. Terahertz lasing arises in the regime of simultaneous excitation of two Fabry–Perot resonances across the graphene substrate thickness and across the groove width in vicinity of the cut-off frequency of the operational TE mode of the metal groove.
10.18721/JPM.173.274
621.373.826
amplification
lasing
terahertz wave
graphene
inverted graphene
groove
https://physmath.spbstu.ru/article/2024.76.74/
CNF
RUS
368-372
Isupova
Ekaterina
isupova.e24@mail.ru
Valov
Anton
tony.valov2015@yandex.ru
System of the temperature controller for the rubidium frequency standard
The article discusses the task of improving the thermal stability of a device used in a rubidium frequency standard. It considers the entire standard and its gas cell, justifying the need for thermal stabilization. To combat temperature instability, which can negatively affect optical elements in the device, a new thermal stabilization system for the gas cell of a quantum frequency standard was developed. Laboratory tests of the quantum discriminator in a thermal chamber showed excellent performance, with a resistance change of the thermistor in the bridge being 2 times lower than in the previous circuit. The use of an instrumentational amplifier, which reduces the error signal in the bridge, and a PID (proportional-integral-derivative) controller, which corrects transients and provides stable and accurate regulation, while protecting the circuit from overshoots, have been proven effective. With the help of thermal stabilization, the short- and long-term stability of frequency and time standards can be further enhanced, which will positively affect the synchronization of time scales in satellite navigation systems.
10.18721/JPM.173.275
53.06
Rubidium frequency standard
gas cell
optical pumping
temperature control
proportional-integral-differential regulator
https://physmath.spbstu.ru/article/2024.76.75/