2304-9782, 2618-8686, 2405-7223 16 3.2 2023 1-443

CNF RUS 9-15 Ioffe Institute Kovach Yakov yakovachyakov@gmail.com

St. Petersburg, Russian Federation

Ioffe Institute Blokhin Sergei blokh@mail.ioffe.ru

St. Petersburg, Russian Federation

Ioffe Institute Bobrov Mikhail bobrov.mikh@gmail.com

St. Petersburg, Russian Federation

0000-0002-3449-8711 Ioffe Institute Blokhin Aleksey Aleksey.Blokhin@mail.ioffe.ru

St. Petersburg, Russian Federation

0000-0003-2500-1715 Ioffe Institute Maleev Nicolai maleev.beam@mail.ioffe.ru

St. Petersburg, Russian Federation

0000-0002-7221-0117 Ioffe Institute Kuzmenkov Aleksandr kuzmenkov@mail.ioffe.ru

St. Petersburg, Russian Federation

ITMO University Novikov Innokenty innokenty.novikov@itmo.ru

St. Petersburg, Russian Federation

ITMO University Karachinsky Leonid lkarachinsky@itmo.ru

St. Petersburg, Russian Federation

JSC OKB-Planeta Voropaev Kirill kirill.voropaev@novsu.ru

V. Novgorod, Russian Federation

0000-0002-0789-4241 Alferov University Egorov Anton anton.egorov@connector-optics.com

St. Petersburg, Russian Federation

Submicron Heterostructures for Microelectronics Research and Engineering Center, RAS Ustinov Victor info@ntcm-ras.ru

St. Petersburg, Russian Federation

Emission linewidth and α-factor of 1.3 µm-range vertical cavity surface emitting laser based on InGaAs/InAlGaAs superlattice Static, spectral and linewidth measurements of 1.3 µm-range vertical-cavity surface-emitting lasers based on InGaAs/InAlGaAs superlattice are presented. Minimum emission linewidth about 40-45 MHz was obtained at output power of ~3.3 mW and operating current of ~8 mA using the Fabry-Perot interferometer method. During a further increase in the output optical power the emission linewidth broadening could be observed due to the rise of a laser internal temperature (self-heating). Based on the analysis of the internal optical losses and internal quantum efficiency the linewidth enhancement factor (α-factor) was evaluated at about 7.7‒9 depending on population inversion factor of 2-1.5. 10.18721/JPM.163.201 621.373.8 vertical-cavity surface-emitting laser superlattice wafer fusion linewidth α-factor https://physmath.spbstu.ru/article/2023.69.1/

CNF RUS 16-22 Ioffe Institute Blokhin Sergei blokh@mail.ioffe.ru

St. Petersburg, Russian Federation

Ioffe Institute Kovach Yakov yakovachyakov@gmail.com

St. Petersburg, Russian Federation

Ioffe Institute Bobrov Mikhail bobrov.mikh@gmail.com

St. Petersburg, Russian Federation

0000-0002-3449-8711 Ioffe Institute Blokhin Aleksey Aleksey.Blokhin@mail.ioffe.ru

St. Petersburg, Russian Federation

0000-0003-2500-1715 Ioffe Institute Maleev Nicolai maleev.beam@mail.ioffe.ru

St. Petersburg, Russian Federation

0000-0002-7221-0117 Ioffe Institute Kuzmenkov Aleksandr kuzmenkov@mail.ioffe.ru

St. Petersburg, Russian Federation

Zadiranov Yuri Kulagina Marina M. Marina.Kulagina@mail.ioffe.ru Guseva Yulia Guseva.Julia@mail.ioffe.ru 0000-0002-2181-5300 Submicron Heterostructures for Microelectronics, Research & Engineering Center, RAS Vasil’ev Alexey

St. Petersburg, Russian Federation

Submicron Heterostructures for Microelectronics Research and Engineering Center, RAS Ustinov Victor info@ntcm-ras.ru

St. Petersburg, Russian Federation

Vertical-cavity surface-emitting lasers for compact atomic sensors The design features of 8XX nm-range vertical-cavity surface-emitting lasers for providing single-mode and polarization-stable lasing, narrowing the spectral linewidth of laser emission and achieving high modulation bandwidth are considered The special intra-cavity contacted design and the rhomb-shaped oxide-confined aperture can simultaneously provide single-mode output optical power above 1 mW, fixed polarization direction, emission linewidth below 50 MHz and modulation bandwidth more than 5 GHz. 10.18721/JPM.163.202 621.373.8 vertical-cavity surface-emitting laser single-mode polarization linewidth modulation bandwidth https://physmath.spbstu.ru/article/2023.69.2/

CNF RUS 23-27 Ignatev Andrei dep5@vniitf.ru Fomin Alexey dep5@vniitf.ru Usmanov Sergey dep5@vniitf.ru FSUE “RFNC-VNIITF named after Academ. E. I. Zababakhin” Kadigrob Ekaterina dep5@vniitf.ru

Snezhinsk, Russian Federation

Laser diode module over 350 W power output with 200 µm/NA 0.22 fiber The paper reports the development of the 915 nm laser module (LM) based on high-power single-emitter InGaAs/AlGaAs laser diodes (LDs). The main options to increase the output LM power as compared to the previous sample were considered. The optical system was designed for coupling the beams into a silica-silica fiber with a core of 200 µm in diameter and a numerical aperture of 0.22. The maximum reached CW output power was 368 W at a nominal current of 22 A and thermal stabilization temperature of 20 °С, the total LM efficiency of 47%. 10.18721/JPM.163.203 621.373.826 laser module high-power laser diodes optical fiber https://physmath.spbstu.ru/article/2023.69.3/

CNF RUS 28-32 Dryazgov Mikhail mdryazgov@hse.ru 0009-0007-1064-1564 Birukov Yury 0009-0009-2802-8308 Taratorin Konstantin 0000-0002-1931-2173 Dyakonov Ivan Korneev Alexander alex.korneev78@gmail.com 0000-0001-9810-1958 Straupe Stanislav 0000-0001-7681-7162 Kylik Sergey Pockels cell performance in N-photon demultiplexer We investigate the efficiency of a loop scheme for the spatial demultiplexing of N successive photons using only one Pockels cell at the center of the loop scheme. The maximum operating frequency of the Pockels cell, due to technical limitations, is 13.5 MHz. We experimentally find the maximum achievable demultiplexing efficiency with a single Pockels cell using continuous-wave and pulsed lasers and analog fast photodetectors. The maximum efficiency achieved at the maximum switching frequency is 87%. 10.18721/JPM.163.204 535.14 photons demultiplexing single-photon source Pockels cell https://physmath.spbstu.ru/article/2023.69.4/

CNF RUS 33-38 0009-0004-3728-9837 Goranskaia Svetlana A new method for calculating spectral diffractive lenses for focusing laser radiation of various wave lengths The necessity of developing a new methodology for calculating diffractive spectral lenses for optical systems with variable wavelength laser radiation is substantiated. The method for calculating spectral diffraction lenses for focusing radiation of different wavelengths at specified focal points has been developed. The method for calculating cascade metal-dielectric layered structures for optical filtering has been developed, and a method for obtaining neural network descriptors applicable to the analysis of hyperspectral data has been developed. Calculation examples for various designs of optical diffractive lenses are presented. The optimal parameters for the designs of diffractive lenses are established. 10.18721/JPM.163.205 535.42 Spectral diffraction lenses focus focal plane efficiency assessment microrelief of spectral diffraction lenses https://physmath.spbstu.ru/article/2023.69.5/

CNF RUS 39-43 Zacharenko Yuri y.g.zackharenko@vniim.ru Kononova Natalia n.a.kononova@vniim.ru Kurkova Alexsandra alexsa99k@gmail.com Logvinuk Elena e.i.logvinuk@vniim.ru Fomkina Zoya Application of lasers of metrological appropriation as working standards Today laser measuring systems and sets, interferometers and other measuring units, which principle of operation is based on the use of stabilized laser radiation sources, are actively used to solve urgent problems in metrological laboratories of advanced enterprises of various industries and in leading scientific institutes. This article discusses the research results of a number of stabilized radiation sources with the aim of using them as working standards. The research was carried out on the basis of the D.I. Mendeleyev Institute for Metrology (next VNIIM). 10.18721/JPM.163.206 53.082.5 laser measuring instrument State Primary Standard of the unit of length working standard https://physmath.spbstu.ru/article/2023.69.6/

CNF RUS 44-49 0009-0000-4342-766X Deng Yuanbiao dyuanbiao@gmail.com Davydov Vadim davydov_vadim66@mail.ru Features of photovoltaic cell degradation of solar power plants in Hong Kong and Saint Petersburg This work investigates the degradation characteristics of PV modules in two different climates, Hong Kong and St. Petersburg, in order to better understand the coupling effects of temperature, thermal cycling, UV exposure, relative humidity and other environmental factors on the performance of PV systems. The solar development potential of Hong Kong and St. Petersburg are compared. Different optimization recommendations are given based on the different climates of Hong Kong and St. Petersburg. 10.18721/JPM.163.207 53.04 Photovoltaic Models Solar Panels degradation damp-heat climate humid continental climate electroluminescence https://physmath.spbstu.ru/article/2023.69.7/

CNF RUS 50-55 Babichev Andrei scientific.ocean@gmail.com. Nadtochiy Alexey al.nadtochy@mail.ioffe.ru 0000-0003-0982-907X Tkach Yulia Kryzhanovskaya Natalia V. Natalia nkryzhanovskaya@hse.ru Ioffe Institute Blokhin Sergei blokh@mail.ioffe.ru

St. Petersburg, Russian Federation

Nevedomskiy Vladimir nevedom@mail.ioffe.ru 0000-0002-9448-2471 Connector Optics LLC Gladyshev Andrey andrey.gladyshev@connector-optics.com

St. Petersburg, Russian Federation

0000-0003-2500-1715 Ioffe Institute Maleev Nicolai maleev.beam@mail.ioffe.ru

St. Petersburg, Russian Federation

ITMO University Karachinsky Leonid lkarachinsky@itmo.ru

St. Petersburg, Russian Federation

ITMO University Novikov Innokenty innokenty.novikov@itmo.ru

St. Petersburg, Russian Federation

Photoluminescence study of InGaAs/GaAs quantum dots with bimodal inhomogeneous broadening The comparative studies of optical and structural properties of InGaAs/GaAs quantum dots grown in Stranski–Krastanov growth mode by molecular-beam epitaxy and metal-organic chemical vapor deposition is presented. An analysis of the photoluminescence at ultralow pump levels resulted that the quantum dots ensemble grown by metal-organic chemical vapor deposition exhibits photoluminescence corresponding to quantum dots ground state and at the same time ensemble of quantum dots grown by molecular-beam epitaxy demonstrates the bimodal behavior which can be explained by the presence of two characteristic ensembles of InGaAs/GaAs quantum dots with different sizes and different peaks of photoluminescence. The results on InGaAs/GaAs quantum dots studying by transmission electron microscopy are presented and discussed as well. 10.18721/JPM.163.208 535.37 molecular-beam epitaxy metal-organic chemical vapor deposition gallium arsenide InGaAs Stranski–Krastanov growth mode https://physmath.spbstu.ru/article/2023.69.8/

CNF RUS 56-62 Arinushkina Kseniya k-arinushkina@mail.ru 0000-0002-9520-4596 Adadurov Aleksandr 0009-0002-7511-7740 Savelev Igor Davydov Vadim davydov_vadim66@mail.ru Features of the operation of a laser profilometer in an automated rolling stock control system Faulty wheelset treads were identified as one of the major problems in the early stages of car repairs. Defects of wheel sets that occur during the operation of the rolling stock of the Moscow Railway are analyzed. When scanning the tread surface of wheel pairs with an automatic complex of technical measurements, the principle of operation and control parameters are taken into account. To reduce the stopping time of passing trains, it is proposed to introduce laser profilers on the railway tracks. The control of the geometric parameters of wheel sets using a laser profilometer is an important element of railway transport maintenance. Incorrect wheel sets can lead to high wheel wear, track damage, and poor passenger comfort and safety. In the course of the work, data obtained from measurements of various profiles of the surfaces of freight cars, including wheelsets, were analyzed in comparison with reference profiles. An increase in measurement accuracy has been established by minimizing the human factor, global digitalization of technological processes and automation of rolling stock control along the route. 10.18721/JPM.163.209 620.1.08, 681.786.5, 681.7.014.3 laser profilometer geometrical parameters railway transport wheelset https://physmath.spbstu.ru/article/2023.69.9/

CNF RUS 63-68 Kashapov Artem ar.kashapov@outlook.com Bezus Evgeni evgeni.bezus@gmail.com Bykov Dmitry bykovd@gmail.com Doskolovich Leonid leonid@ipsiras.ru Generation of spatiotemporal optical vortices using Kretschmann setup for transverse magnetic and transverse electric polarizations We investigate optical properties of the Kretschmann setup, which contains a dielectric prism and a metal layer and may also contain an additional dielectric layer. We show that the investigated structure allows one to generate a transverse-magnetic- (TM-) polarized spatiotemporal optical pulse comprising an optical vortex using the “conventional” Kretschmann configuration without an additional layer. We also demonstrate that in the case of transverse electric (TE) polarization, the additional dielectric layer is necessary for satisfying the optical vortex generation condition. The results of rigorous numerical simulations demonstrate the possibility of generating spatiotemporal optical vortices with high quality for both TM- and TE-polarizations. 10.18721/JPM.163.210 535.3 Kretschmann setup optical vortex optical computing https://physmath.spbstu.ru/article/2023.69.10/

CNF RUS 69-74 Moscow Institute of Physics and Technology (National Research University) Kupriyanov Pavel kupriianov.pa@phystech.edu

Moscow, Russian Federation

Rudavin Nikita n.rudavin@goqrate.com Gerasin Ilia i.gerasin@goqrate.com Dvurechenskiy Alexander dvurechenskii.aa@phystech.edu Petrov Ivan i.petrov@goqrate.com Menskoy Daniil d.meskoy@goqrate.com Shakhovoy Roman r.shakhovoy@goqrate.com Influence of quantum states imperfections on the error rate in measurement-device-independent quantum key distribution Quantum key distribution (QKD) is a modern technology that allows two legitimate users obtaining a shared cryptographic key completely secure. Unfortunately, real implementations of QKD systems contain vulnerabilities, such that an eavesdropper can still get information about the key. Therefore, QKD protocols generally use privacy amplification procedures that reduce the size of the key depending on the level of errors that are generally assumed to be caused by a non-legitimate user. So, the quantum bit error rate (QBER) becomes an important parameter significantly affecting the rate of key distribution. In this work, we investigate the influence of quantum states imperfections on the QBER in the measurement-device-independent QKD protocol with time-bin encoding. We proposed a theoretical model that describes imperfect states, and derived formulas for the dependence of the error level on the degree of imperfection. We also conducted an experiment, the results of which are in good agreement with the predictions of the theory. 10.18721/JPM.163.211 535 measurement-device-independent quantum key distribution imperfect states time-bin phase-encoding https://physmath.spbstu.ru/article/2023.69.11/

CNF RUS 75-80 FSUE “RFNC-VNIITF named after Academ. E. I. Zababakhin” Kadigrob Ekaterina dep5@vniitf.ru

Snezhinsk, Russian Federation

Fomin Alexey dep5@vniitf.ru Usmanov Sergey dep5@vniitf.ru Design and simulation of an optical system of high-power fiber-coupled laser module The paper presents the simulation results for an optical system based on a high-power and high-brightness laser module. The module design implies spatial and polarization combining of beams from 24 single-emitter laser diodes. The theoretical design and computational simulation were conducted for the fiber-coupled optical system with the fiber of 200/225 µm in diameter and numerical aperture of 0.22. The coupling efficiency is 89% which correlates with the results of experiments with the laboratory module prototype. 10.18721/JPM.163.212 621.373.826 laser-based diode module coupling optical system spatial combining of beams polarization combining of beams https://physmath.spbstu.ru/article/2023.69.12/

CNF RUS 81-86 Popovskiy Nikita nikitanikita24@mail.ru Davydov Vadim davydov_vadim66@mail.ru Rud Vasiliy rudvas.spb@gmail.com Features of the construction photonic tensor cores for neural networks The demand for efficient and high-performance computing systems has led to the development of photonic-based technologies for machine learning. One of the key components of these systems is the photonic tensor core, which performs matrix operations at high speed and low power consumption. In this article, we review the features of photonic tensor cores and their construction for use in neural networks. We discuss the advantages of photonic-based technologies over traditional electronic-based systems, as well as the challenges in their implementation. We also highlight recent advancements in the development of photonic tensor cores for machine learning applications. 10.18721/JPM.163.213 535.8 photonic tensor cores neural networks optical computing photonics machine learning deep learning data processing https://physmath.spbstu.ru/article/2023.69.13/

CNF RUS 87-91 Vovk Nikolay vovkolg2011@gmail.com Institute of Nanotechnologies of Microelectronics of the RAS Shibalov Maksim maxshibalov@gmail.com

Moscow, Russian Federation

Institute of Nanotechnologies of Microelectronics of the RAS Mumlyakov Alexander mumlyakov.a@inme-ras.ru

Moscow, Russian Federation

Korneeva Yuliya korneeva_yuliya@mail.ru Asharchuk Ilya ilyaasharchuk@gmail.com Smirnov Konstantin skv2050@mail.ru Modelling the influence of planar waveguide cladding thickness on the absorption efficiency of a superconducting NbN strip This paper reports simulation results for 1550 nm wavelength absorption efficiency of a superconducting NbN nanowire coupled to a single-mode Si3N4 waveguide depending on SiO2 cladding thickness. Simulation results for straight, U- and W-shaped strips show that with perfect planarization (no top cladding) the absorption coefficient per unit length is 0.031, 0.07 and 0.11 dB/µm, respectively. 10.18721/JPM.163.214 681.782.473 CMP cladding superconducting detectors https://physmath.spbstu.ru/article/2023.69.14/

CNF RUS 92-96 Bazhanova Veronika vieronika.bazhanova.2003@mail.ru Davydov Vadim davydov_vadim66@mail.ru Features of monitoring the state of viscous media by refraction The article grounds a necessity of liquid media control using refractometer. A method for monitoring liquid media, including mixtures, using refractometric measurements is proposed. A system of equations has been developed to determine the composition of the medium, which consists of components that have not reacted chemically. The results of experimental studies are presented. 10.18721/JPM.163.215 535.8 liquid refraction refractive index concentration light-shadow boundary media state control https://physmath.spbstu.ru/article/2023.69.15/

CNF RUS 97-102 Rudavin Nikita n.rudavin@goqrate.com Gerasin Ilia i.gerasin@goqrate.com Moscow Institute of Physics and Technology (National Research University) Kupriyanov Pavel kupriianov.pa@phystech.edu

Moscow, Russian Federation

Dvurechenskiy Alexander dvurechenskii.aa@phystech.edu Shakhovoy Roman r.shakhovoy@goqrate.com Real-time calibration methods for a commercial MDI-QKD system Quantum key distribution (QKD) is a well-studied field of science and is becoming a common technology. Commercial systems become more available. Such systems require high level of automatization, so, the set of real-time and prior calibrations is required for them. In this work, we propose calibration algorithms that pre-tune the amplitude of pulses and the laser wavelength and also maintain phase and polarization of weak coherent pulses during generation. Described algorithms were implemented on a prototype of the commercial QKD system and demonstrated high results. 10.18721/JPM.163.216 535 quantum key distribution phase fluctuation polarization distortion https://physmath.spbstu.ru/article/2023.69.16/

CNF RUS 103-108 0000-0003-2282-3895 Savelyev Dmitry Dmitry dmitrey.savelyev@yandex.ru The subwavelength optical elements with a nonlinear dependence of the refractive index change for the formation of specified diffraction patterns using high-performance computer systems The diffraction of optical vortices with circular polarization by subwavelength optical microelements with a nonlinear dependence of the change in the refractive index of the substrate was investigated in this paper. The relief height of the elements was varied, as well as the direction of change in the refractive index of the substrate. It was shown that it was possible to obtain a focal spot 37.8% smaller than the focal spot formed by a standard diffractive axicon. It is also shown that it was possible to obtain a light segment 29.7% longer than the light segment formed by the diffractive axicon. It was also demonstrated that it was possible to form a series of optical traps for all considered types of substrates using the ring gratings with a relief height h = 4.24λ without central zones. 10.18721/JPM.163.217 535.42 subwavelength focusing optical vortices FDTD high performance computer systems subwavelength ring gratings https://physmath.spbstu.ru/article/2023.69.17/

CNF RUS 109-113 Astafiev Artyom astafiev.artyom@gmail.com Shakhov Aleksander physics2007@yandex.com Syrchina Maria wrongclue@gmail.com Nadtochenko Victor nadtochenko@gmail.com Analysis of size-dependent optical properties of lysine carbon dots produced by femtosecond laser synthesis Pulsed laser synthesis of fluorescent nanoparticles from amino acids is promising technique for fluorescent imaging. Understanding relation between nanoparticle size and absorption and fluorescence characteristics sheds light on mechanism of fluorescence and enables control of optical properties of products. To study this relation, we separated products obtained by laser synthesis from L-lysine into fractions of different size and analyzed optical properties and chemical composition of these fractions. 10.18721/JPM.163.218 544.536 luminescent carbon dots femtosecond laser pulses nanomaterials photostability https://physmath.spbstu.ru/article/2023.69.18/

CNF RUS 114-119 Neelova Angelina angelina.neelova@gmail.com Shepilova Elena yelena_sch@mail.ru Nosova Ekaterina katerinanossova@gmail.com Rongonen Sofia sofiagonobobleva@mail.ru Parfenov Vadim vadim_parfenov@mail.ru A study of chemical and mechanical properties of paper under its laser cleaning This paper is devoted to investigation of chemical and mechanical paper properties after laser cleaning. In recent years, laser technologies have been widely used in the preservation of Cultural Heritage (CH). One of the main fields of laser application in this area is the cleaning of surfaces of CH objects from natural and anthropogenic contaminations. However, cleaning of books and documents on paper basis requires intensive experimental studies. Comparison of paper properties before and after laser cleaning may prove the safety of laser cleaning. One of the most important parameters that characterize paper strength and durability are hydrogen ion concentration (pH) and absorptivity. We will present experimental results on pH value measurements of paper as well as results on paper absorptivity performed on model samples and real historical artefacts such as books and fragments of newspapers. The results of studies indicate on the neutralising effect of laser irradiation which can be used for the conservation of books and documents on paper base. 10.18721/JPM.163.219 544.032.65 heritage science laser application laser cleaning https://physmath.spbstu.ru/article/2023.69.19/

CNF RUS 120-124 Naumova Victoria Naumova.vv@edu.spbstu.ru Orlov Oleg oorl@mail.ru Compact solid-state laser with diode optical pumping and high frequency stability Continuous single-frequency solid-state lasers with intracavity frequency doubling Nd+3/YVO/KTP, whose frequency is stabilized along the absorption lines of molecular iodine, are currently widely used in laser interferometers. The paper describes a small-sized laser with frequency instability at the level of 10-12 with an averaging time of 1 second. It has been shown that this level of stability is limited by the amplitude noise of the laser, which in turn are determined by fluctuations in the laser pumping. Reducing the amplitude noise and increasing the signal-to-noise ratio in the stabilization system made it possible to further increase the frequency stability of laser radiation. 10.18721/JPM.163.220 53.082.534 solid-state laser laser diode amplitude noise Bragg grating https://physmath.spbstu.ru/article/2023.69.20/

CNF RUS 125-129 Shuklov Ivan shuklov.ia@mipt.ru Milenkovich Teodora tmilenkovich@phystech.edu Mardini Alaa Alddin aladdin.mardini@phystech.edu Phosphine-free synthesis of selenide colloidal quantum dots Metal selenide colloidal quantum dots have promising properties for applications in many fields such as gas sensing, food quality control, car accessories for orientation under low-visibility conditions, Infrared detectors for spectrometers. The wide application of selenide nanoparticles is limited due to a number of reasons. High requirements to the equipment for preparation of these materials in an inert atmosphere as well as poor reproducibility of modern synthetic procedures are some of the major reasons for very limited application of the selenide quantum dots today. Preparation of mercury and lead selenide colloidal nanoparticles by standard phosphine based procedures are especially affected by these problems. In this paper we report the application of selenium precursor prepared by dissolution of elemental selenium by action of sodium borohydride in oleylamine in the synthesis of lead selenide and mercury selenide quantum dots. The optical properties of the obtained quantum dots are investigated. This reagent is more easily prepared and less affected by conditions as a common phosphine based precursors. The impact of the reaction conditions and isolation procedures on the size distribution is reported. The work-up procedures are developed. 10.18721/JPM.163.221 544.77 quantum dots nanoparticles selenides hot-injection synthesis https://physmath.spbstu.ru/article/2023.69.21/

CNF RUS 130-136 Anikina Maria mari.a.nikina@yandex.ru 0000-0001-7143-6686 Kusnetsov Alexey alkuznetsov1998@gmail.com Toksumakov Adilet adilet.toksumakov@phystech.edu Dremov Viacheslav dremovs54@gmail.com Ghazaryan Davit dav280892@gmail.com 0000-0001-5547-9387 Alferov University Fedorov Vladimir fedorov_vv@spbstu.ru Moscow Institute of Physics and Technology (MIPT) Arsenin Aleksey Arsenin.av@mipt.ru

Moscow, Russian Federation

Moscow Institute of Physics and Technology (MIPT) Volkov Valentyn vsv.mipt@gmail.com

Moscow, Russian Federation

0000-0001-7223-7232 Moscow Institute of Physics and Technology (National Research University) Bolshakov Alexey acr1235@mail.ru

Moscow, Russian Federation

Photoluminescence anisotropy in hybrid nanostructures based on gallium phosphide nanowire and 2D transition metal dichalcogenides Integration of nanophotonic structures having different geometry is a well-established way to promote desired optical effects. This work is aimed at study of the optical properties of a hybrid structure based on a transition metal dichalcogenides (TMDC) thin layer and III-V nanowires. The structures were studied by µ-Raman and µ-photoluminescence spectroscopy at room temperature. We demonstrate experimentally guiding of the TMDC photoluminescence through the individual nanowires and analyze this phenomenon. The results of the work shed a light on new ways for fabrication of integrated optical circuitry components. 10.18721/JPM.163.222 537.876.4 photonics photoluminescence 2D TMDC III–V semiconductors nanowires https://physmath.spbstu.ru/article/2023.69.22/

CNF RUS 137-142 Stepanenkov Gregory 261199g@gmail.com Vakorina Daria cementary.ley@gmail.com Davydov Vadim davydov_vadim66@mail.ru Davydov Roman davydovroman@outlook.com Features of express control of volatile hydrocarbon media and their mixtures in visible light The necessity of development of new methods of express control of hydrocarbon media and their mixtures, especially volatile ones is proved. The problems arising when controlling the condition of volatile hydrocarbon media using the phenomenon of refraction are noted. A new method for determining the components and the ratio between their concentrations in a mixture of volatile hydrocarbon media has been developed. The use of the new method makes it possible to determine the composition and percentage content of the components in hydrocarbon mixtures. The design of a small-size refractometer for the implementation of the new method has been developed. There are no analogs of the new method and refractometer design. The developed instrument can also measure n with an error of ±0.0004 in the range from 1.250 to 1.740. This is sufficient for express control of the state of all hydrocarbon media and their mixtures. The results of studies of gasoline and oil mixtures are presented. 10.18721/JPM.163.223 535-7 hydrocarbon medium mixture refraction express control refractive index visible light light-shadow boundary concentration measurement error https://physmath.spbstu.ru/article/2023.69.23/

CNF RUS 143-149 Reznikov Bogdan rznkff@gmail.com Stepanenkov Gregory 261199g@gmail.com Isaenko Dmitry isaenko-d@mail.ru Logvinova Ekaterina katua.logvinova@gmail.com Pachin Andrey pachin.andrej@bk.ru Kolybelnikov Nikolai ya.nikolai-kolyb@yandex.ru Peculiarities of telemetry information transmission using analog fiber-optic communication line over long distances in a complex electromagnetic environment To implement the environmental monitoring program, it is proposed to use the upper parts of power line towers for the placement of measuring sensors of various kinds. The analysis of possibilities of application of various ways of telemetric information transmission over long distances in the presence of powerful electromagnetic interference is carried out. It was found that the most appropriate in this situation for the transmission of information to use analog fiber-optic communication lines. The use of analog FOCL, which takes into account a number of features we have established the peculiarities of the transmission of analog optical signals, allows you to transmit information at distances greater than 500 km without amplification. According to the results of calculation of the FOCL parameters and experimental studies, the limiting distances for information transmission and the permissible power for the used laser radiation are determined. 10.18721/JPM.163.224 621.372.2:621.398 telemetry information electromagnetic environment optical signal fiber attenuation distance laser radiation power analog information transmission format signal-to-noise ratio https://physmath.spbstu.ru/article/2023.69.24/

CNF RUS 150-153 Vilchenko Sergey sergey.vilchenko@yandex.ru 0009-0003-9101-9718 Gribko Vladimir KDP crystals as an optical element in high-power laser system This research presents a study of the dependence of the addition of ethylenediaminetetraacetic acid to the KDP crystal on the crystal growth kinetics and its physical-optical properties: width of the dead zone, growth rate of crystal faces, and transmission spectra. Obtained data on the change of dead zone width of growth solutions with concentrations of 0, 0.001, 0.005, 0.015, 0.02 mol% EDTA. KDP crystal was grown by the method of high-speed growth of oriented crystals, its transmission spectra in the range from 200 to 1100 nm were obtained. The possibility of adding EDTA when growing KDP crystals by the high-speed method is discussed. 10.18721/JPM.163.225 535 KDP crystal potassium dihydrophosphate EDTA high-power lasers https://physmath.spbstu.ru/article/2023.69.25/

CNF RUS 154-160 Oaserele Denis oasereledenis@gmail.com Gordeeva Aleksandra alexgordeeva99@mail.ru Davydov Roman davydovroman@outlook.com Development of a photodetector for an analog extended fiber-optic communication line Different designs of analog fiber-optic lines (FOCL) for transmitting information at different distances in different frequency ranges are considered. The peculiarities of optical analog signals transmission, which will influence its registration in the FOCL photodetector module, are noted. The format of analog signals to be transmitted over a FOCL over a distance of more than 500 km without the use of optical amplifiers was determined. A photodetector module of the type PDA 400 Thorlabs with a peak response of 0.95 A/W at 1550 nm is considered. The bandwidth of which is from DC to 10 Mhz. Response: from 800 to 1750 nm. Based on the calculation of various parameters of the FOCL and its energy balance, the requirements to the design and characteristics of the photodetector module were determined. A laboratory mockup of the photodetector module was assembled. The results of its operation as a part of the analog FOCL with different ranges of information transmission are presented. 10.18721/JPM.163.226 621.383.5 Analog optical signal photodetector laser radiation wavelength line width dynamic range registration bandwidth signal/noise ratio https://physmath.spbstu.ru/article/2023.69.26/

CNF RUS 161-166 Mitrofanova Anastasia mitrofanova.ae@phystech.edu Skuratov Ilya ilya.skuratov@phystech.edu Svetikov Vladimir vl.svetikov@gmail.com Investigation of phase shift in waveguides with chalcogenide glasses The paper presents a numerical study of the propagation of the waveguide mode in a waveguide with films of chalcogenide glasses, a numerical analysis of the phase change of the waveguide mode depending on the phase state of chalcogenide glass and geometric parameters of the structure. 10.18721/JPM.163.227 621.383 integrated optics chalcogenide glasses phase shift https://physmath.spbstu.ru/article/2023.69.27/

CNF RUS 167-170 Murzagalina Sofya murzagalina.sm@phystech.edu Skuratov Ilya ilya.skuratov@phystech.edu The research of nonlinear optical phenomena in silicon slot waveguide structures This work is devoted to the study of nonlinear phenomena in silicon waveguides, as well as in silicon-organic hybrids, which help to obtain improved characteristics of the initial device by compensating for the limitations imposed by second- and third-order nonlinearities in Si. The slot waveguide model is analyzed using computational methods such as the finite element method, the finite difference method in the time domain, and the singular perturbation method. 10.18721/JPM.163.228 621.372.8 nonlinearity doped polymers slot waveguides FEM FDTD SPT https://physmath.spbstu.ru/article/2023.69.28/

CNF RUS 171-176 Jabr Yara yara.jabr.1996@gmail.com Smirnova Lyudmila lysm@mail.ru Parfenov Vadim vadim_parfenov@mail.ru Study of color characteristics of pigments and paints by spectrophotometer Nowadays, in restoring and examining paintings, the search for effective analytical methods for studying paint pigments is very actual. The identification of poor pigments is important itself, but it is also important for the determination of pigments in paints with different binders. Many studies were done in this field by means of Raman and IR Fourier spectroscopy, X-ray fluorescence spectrometry and some others. However, all the mentioned methods require the use of complex and expensive equipment, sampling, and preparation of samples. For this reason, the search for new simple non-destructive, and inexpensive testing methods is still very actual. In this work for studying color characteristics of pigments, the spectrophotometry method was used. In the experiments, the color characteristics of model samples were studied. It was shown that the color characteristics of pigments and paints, including, for example, whitewash (lead, zinc, and titanium), have characteristic individual values of the color coordinates L*a*b* that may be used for their identification. 10.18721/JPM.163.229 535 spectrophotometry pigments paints color characteristics https://physmath.spbstu.ru/article/2023.69.29/

CNF RUS 177-182 Komarov Ivan master_kom@mail.ru Mendeleev Russian University of Chemistry and Technology Danilov Egor danilovegor1@gmail.com

Moscow, Russian Federation

On the wetting of polyethylene terephthalate substrates with multicomponent graphene oxide dispersions In this work, we investigate wetting properties of polymer polyethylene terephthalate (PET) substrates with graphene oxide multicomponent dispersions. Overcoming poor wettability polymer substrates like PET, promising for flexible electronics applications, with commercially available water graphene oxide suspensions is proposed to solve by adding organic components. We used dimethylacetamide (DMA) and thinner for lacquer paints (LT) to successfully show the decrease of wetting angle. Moreover, we showed stability of multicomponent dispersion with DMA within more than 6 months and LT within more than several weeks and also found out that drying time of droplets of mixed dispersions with different additives may vary more than 15 times that is important for choice of the preferred deposition method. 10.18721/JPM.163.230 620.3 graphene oxide mixed dispersions organic solutions DMA PET substrate https://physmath.spbstu.ru/article/2023.69.30/

CNF RUS 183-187 Stovpiaga Ekaterina kattrof@gvg.ioffe.ru Grudinkin Sergey grudink@gvg.ioffe.ru Eurov Daniil edan@mail.ru Ioffe Institute Kurdyukov Dmitry kurd@gvg.ioffe.ru

St. Petersburg, Russian Federation

A facile low-temperature approach for organics removal from SiO2-CTAB mesoporous particles A simple, fast and efficient method has been developed for removing pore-forming organic substances from MCM-41 type materials without affecting their shape, structural and adsorption characteristics. The method is based on express annealing of the synthesized silica materials in vacuum at low temperatures. It was shown that the synthesized particles do not sinter during annealing in vacuum and are monodisperse and aggregatively stable. 10.18721/JPM.163.231 54.057 Mesoporous silica template method organics removal CTAB vacuum annealing https://physmath.spbstu.ru/article/2023.69.31/

CNF RUS 188-193 Eurov Daniil edan@mail.ru 0000-0002-1571-209X ITMO University Kirilenko Demid demid.kirilenko@mail.ioffe.ru

St. Petersburg, Russian Federation

Stovpiaga Ekaterina kattrof@gvg.ioffe.ru Ioffe Institute Kurdyukov Dmitry kurd@gvg.ioffe.ru

St. Petersburg, Russian Federation

Hard-template synthesis of monodisperse spherical microporous SiO2 particles A simple and facile method for the synthesis of monodisperse microporous spherical silica particles is proposed. The method is based on a traditional Stöber technique with the use of ammonium metavanadate acting as a hard template for the micropore formation. The thus obtained silica particles possess an interconnected system of micropores that determines high values of their specific surface area (up to 320 m2 g-1) and pore volume (up to 0.25 cm3 g-1). The use of the Stöber method allows obtaining highly monodisperse spherical particles with the standard size deviation not exceeding 5%. The particles with an average diameter of 250 nm exhibit high sedimentation and aggregation stability and form stable hydrosol, which is important from the practical point of view. 10.18721/JPM.163.232 54.057 Porous silica monodispersity template method ammonium metavanadate microporosity https://physmath.spbstu.ru/article/2023.69.32/

CNF RUS 194-199 Litovchenko Natalya natlitovch@yandex.ru Martynova Irina Irisha-windsurfer@yandex.ru Gavrilin Ilya gavrilin.ilya@gmail.com Kudryashova Yulia yulia.kudryashova@mail.ru Ryazanov Roman r.m.ryazanov@gmail.com Lebedev Egor dr.beefheart@gmail.com The method of formation of planar lithium-ion batteries with composite electrode materials A novel approach was developed to locally fabricate planar lithium-ion batteries using composite electrode materials. The method involved electrophoretic deposition to create a composite cathode material comprising NCA and Super C45, while the anode was formed through localized electrochemical deposition of germanium nanofibers. This technique successfully formed planar batteries with heterogeneous composite electrodes on a single plane, offering advantages such as efficient ion transport, minimized electrode polarization, and enhanced electrochemical performance. The integration of electrochemical and electrophoretic deposition methods allowed for precise control of layer composition and deposition parameters, optimizing the properties of planar batteries in terms of specific capacitance and electrical conductivity. The study also focused on laser engraving topology and optimized modes for planar battery structures, enabling the integration of multiple processes in a single manufacturing cycle. Capacitive characteristics were assessed using specialized polypropylene tooling, and the planar battery prototypes demonstrated comparable capacity (4 µAh) to existing commercial alternatives. 10.18721/JPM.163.233 541.138:621.315 planar lithium-ion battery electrophoretic deposition electrochemical deposition cathode material anode material https://physmath.spbstu.ru/article/2023.69.33/

CNF RUS 200-205 Kamalov Almaz 1.almaz.kamalov@gmail.com Borisova Margarita Charge relaxation after exposure to barrier and corona discharge of polylactide films In this work, it is shown that the effect of a corona discharge and a dielectric barrier discharge differs in depth of charge penetration and relaxation time. The relaxation time and the mechanism of charge relaxation in polylactide films were determined using thermally stimulated depolarization current (TSDC).Experimental data are analyzed based on modern ideas about the mechanism of charge relaxation. The activation energies are calculated based on a model that considers the intrinsic conductivity of the dielectric. By the method of computer modeling, the complex TSDC spectra are decomposed into separate elementary maxima, which are described by first-order kinetics, and the activation energies corresponding to them are determined. 10.18721/JPM.163.234 620.22 polylactide relaxation charge plasma film https://physmath.spbstu.ru/article/2023.69.34/

CNF RUS 206-210 Isokjanov Shakhboz isakjanov2997@gmail.com Ryazanov Roman r.m.ryazanov@gmail.com Kitsyuk Evgeny Kitsyuk.e@gmail.com Lebedev Egor dr.beefheart@gmail.com Study of composite electrode material formation features based on super C45/RuO2 and super C45/MnO2 for asymmetric planar supercapacitors A method for fabricating an asymmetric planar supercapacitor with dissimilar electrodes based on Super C45/RuO2 and Super C45/MnO2 using the electrophoretic deposition method has been developed. The electrode topology was formed using laser engraving. The electrophoretic deposition method was chosen for deposition of the composite onto the surface of nickel-coated sitall plates. The features of sequential deposition of composite materials onto the substrate surface were studied, as well as the influence of electrophoresis modes on the composition and morphology of the formed electrode layers. The research was conducted to identify the dependence of the capacitance characteristics of the formed electrode materials on the process parameters. A technology for producing compact planar supercapacitors with an asymmetric configuration for a wide range of microelectronics applications has been developed. 10.18721/JPM.163.235 621.359.3 planar supercapacitor asymmetric supercapacitor laser engraving electrode material electrophoretic deposition suspension https://physmath.spbstu.ru/article/2023.69.35/

CNF RUS 211-216 Institute of Nanotechnologies of Microelectronics of the RAS Mumlyakov Alexander mumlyakov.a@inme-ras.ru

Moscow, Russian Federation

Institute of Nanotechnologies of Microelectronics of the RAS Pershina Elena squirrel_red@mail.ru

Moscow, Russian Federation

Institute of Nanotechnologies of Microelectronics of the RAS Shibalova Anastasia shibalova.a@inme-ras.ru

Moscow, Russian Federation

Institute of Nanotechnologies of Microelectronics of the RAS Shibalov Maksim maxshibalov@gmail.com

Moscow, Russian Federation

Anufriev Yuri hf_super@mail.ru Filippov Ivan ivn.filippov@gmail.com Sen’ Vasiliy dlcmsu@gmail.com Tarkhov Michael tmafuz@mail.ru Study of n-diamond and carbon nanowalls structure synthsized by the RF-PECVD In this work, a hybrid n-diamond-carbon nanowalls structure was synthesized on a 100 mm diameter silicon wafer using RF-PECVD (CCP type). This structure was analyzed by transmission microscopy, electron microscopy and X-ray diffraction. It was found that the addition of carbon monoxide (CO) to a gas mixture of methane (CH4), argon (Ar), and hydrogen (H2) leads to the formation of n-diamond nanocrystals in the basal layer. Using plasma surface treatment techniques, the carbon nanowalls were fully removed and the lower layer consisting of n-diamond was studied separately, for which X-ray diffraction results of a separate n-diamond phase were obtained for the first time. 10.18721/JPM.163.236 539.2 n-diamond carbon nanowalls X-ray diffraction allotropic form hybrid material https://physmath.spbstu.ru/article/2023.69.36/

CNF RUS 217-222 0000-0003-1417-0177 National Research University of Electronic Technology Nekrasov Nikita

Moscow, Russian Federation

Romashkin Alexey romaleval@gmail.com National Research University of Electronic Technology Barsukov Leonty leonty.barsukov@gmail.com

Moscow, Russian Federation

Nikitin Konstantin halkwww@mail.ru Levin Denis vkn@miee.ru National Research University of Electronic Technology Bobrinetskiy Ivan bobrinet@mail.ru

Moscow, Russian Federation

National Research University of Electronic Technology Nevolin Vladimir vkn@miee.ru

Moscow, Russian Federation

Mechanisms of residual polymer removal in solvent mixtures after the graphene transfer and effects on channel conductivity gate control After graphene transfer, solvent mixtures were used to remove residual PMMA, which efficiency was estimated by AFM, Raman spectroscopy, and CVC. That post-treatment gives: stress relaxation (2D peak shift, compared to trichloroethylene), 2D/G intensity ratio 1.1 changes to 2.6, clean graphene regions exceed 100–150 nm size; threshold point shifts to zero but the conductivity and mobility reduce. Ethanolamine functionalizes both PMMA and graphene. 10.18721/JPM.163.237 [66.061.16;544.163.2:621.793]:681.586.72 graphene transfer polymer removal sensor polymethyl methacrylate https://physmath.spbstu.ru/article/2023.69.37/

CNF RUS 223-227 Institute for Problems of Mechanical Engineering RAS Grashchenko Alexander asgrashchenko@bk.ru

St. Petersburg, Russian Federation

Institute for Problems of Mechanical Engineering RAS Kukushkin Sergey sergey.a.kukushkin@gmail.com

St. Petersburg, Russian Federation

Sharofidinov Shukrillo shukrillo71@mail.ru Structural surface characteristics of aluminum-gallium nitride films on silicon carbide nanolayers on silicon Experimental studies of the surface morphology of AlGaN films formed on nanometer-thick SiC layers synthesized on Si by atom substitution were performed. Structural characteristics of the surface of AlGaN/SiC/Si and AlGaN/AlN/SiC/Si heterostructures grown on Si with orientations (001), (011) and (111) were studied by atomic force microscopy. It is shown that the Si orientation has a significant influence on the surface morphology of AlGaN films. The surface roughness and characteristic dimensions of the AlGaN surface structure on nano-SiC/Si with and without an AlN buffer layer were measured. It is shown that the buffer AlN layer leads to a change in the surface structure dimensions of AlGaN layers. 10.18721/JPM.163.238 621.315.592 AFM thin films heterostructures nano-SiC/Si AlGaN https://physmath.spbstu.ru/article/2023.69.38/

CNF RUS 228-232 Khakhulin Semyon khsmn@ya.ru Lakuntsova Olga olya-lakuncova@mail.ru St. Petersburg Electrotechnical University "LETI" Firsov Dmitrii d.d.firsov@gmail.com

St. Petersburg, Russian Federation

St. Petersburg Electrotechnical University "LETI" Komkov Oleg oleg_sergeevich@mail.ru

St. Petersburg, Russian Federation

Optical anisotropy of black phosphorus characterized by FTIR spectroscopy methods The present study employs the FTIR spectroscopy methods, such as polarized transmittance measurements and the reflectance anisotropy spectroscopy technique, to characterize the optical properties of black phosphorus - a layered semiconductor with a narrow band gap. Our results reveal a notable crystal absorption anisotropy within the 0.26-0.42 eV range with strong linear dichroism, wherein a polarization-dependent feature is observed in the reflectance anisotropy spectra with a maximum near 0.33 eV. This feature is believed to be related to a direct interband transition E0, which is permitted for linearly polarized incident radiation along the AC crystal direction and forbidden for the ZZ direction. 10.18721/JPM.163.239 538.958 Black phosphorous reflectance anisotropy spectroscopy in-plane anisotropy FTIR spectroscopy https://physmath.spbstu.ru/article/2023.69.39/

CNF RUS 233-238 Kamalov Almaz 1.almaz.kamalov@gmail.com Kraft Vadim Sparta3006@inbox.ru Vaganov Gleb glebvaganov@mail.ru Nesterova Anna annest.2107@yandex.ru Borisova Margarita 0000-0002-4823-0695 The S. M. Kirov Military Medical Academy of the Ministry of Defense of the Russian Federation Ivankova Elena ivelen@mail.ru Yudin Vladimir yudin@hq.macro.ru Production of polyimide nonwoven fabric with low dielectric permittivity This work is devoted to the production of nonwoven polyimide material by electroforming from aqueous solutions of polyamide acid salts based on pyromellitic dianhydride (PMDA) and 4,4′-oxydiphenylenediamine (ODA). The dielectric and mechanical properties of the nonwoven material were determined over a wide frequency and temperature range. The dielectric permittivity of the material at 20 °C and a frequency of 1 Hz was 1.5. 10.18721/JPM.163.240 691.175.5/.8 electroforming polyimide nonwoven material relative permittivity elastic modulus https://physmath.spbstu.ru/article/2023.69.40/

CNF RUS 239-243 Kapustin Sergey hare22@yandex.ru Volkov Alexandr a.s.volkov@narfu.ru Tsykareva Yuliana aisonoka@gmail.com Icing and chemical pollution sensor based on carbon nanoparticles-based superhydrophobic coating A method of using a section of a superhydrophobic coating based on xerogel made out of carbon nanotubes and carbon-like onions as an icing sensor was suggested. The obtained dependencies of the conductivity of the coating on the state of the environment are not linear, but unambiguous. They allow to track changes in the environmental conditions. The sensitivity of the coating to volatile substances adsorbed by the surface of the carbon nanoparticles was revealed. Selection ways of the influence of ice and pollutants were suggested. The coating area serves as a protective surface and a detector, and its dual purpose not only simplifies the anti-icing system, but also allows it to potentially work as a chemical sensor aimed at detecting contaminants. The dimensions of the sensitive areas are determined by the reliability of local data and the sensitivity of the surface resistance measurement circuit, and therefore can vary quite freely. Samples with an area from 10 to 0.5 square centimeter were used in the work. 10.18721/JPM.163.241 620.22 carbon nanotubes anti-icing coatings superhydrophobicity icing https://physmath.spbstu.ru/article/2023.69.41/

CNF RUS 244-248 Toikka Andrei atoikka@obraz.pro Kamanina Natalia nvkamanina@mail.ru Formation of the anisotropic ITO-based orienting layers for the liquid crystal devices In this paper, the influence of the CO2 laser ablation on the indium-tin oxide (ITO) and ITO with carbon nanotubes (CNTs) was considered. The ITO and CNTs were deposited on the Crown K8 substrates via the laser-oriented deposition technique. The anisotropy of the wetting angle for the laser-ablated pure ITO and ITO with the CNTs thin films was considered and compared. The ablation of pure ITO thin films under the CO2-laser provides the arithmetical mean deviation of the profile in the range of 1.0-1.3 nm (in parallel direction relative to laser ablation) and in the range of 1.6.-1.7 nm (in perpendicular direction). In the case for the ITO with CNTs the mean deviation of the profile corresponds to the ranges of 6.2-9.1 nm and of 10.9-24.3 nm for the parallel and perpendicular directions respectively. The anisotropy of the height distribution leads to the same tendency in the wetting angle. The mean value of the wetting angle anisotropy for pure ITO is 31.6° and for ITO with CNTs it is 48.3°. The possibility to control the anisotropy of the wetting angle via the deposition of the CNTs and the laser ablation allow considering the ITO modifications as the universal electrical contacts and alignment layers for the twisted-nematic liquid crystal devices. 10.18721/JPM.163.242 53.043, 532.6 indium-tin oxides wetting angle laser processing liquid crystal devices https://physmath.spbstu.ru/article/2023.69.42/

CNF RUS 249-254 Voronezh State University of Engineering Technology Lenshin Alexander lenshinas@mail.ru

Voronezh, Russian Federation

Voronezh State University Zolotukhin Dmitriy zolotuhin@phys.vsu.ru

Voronezh, Russian Federation

Seredin Pavel paul@physvsu.ru Mizerov Andrey andreymizerov@rambler.ru Study of morphology and composition of nanoscale AlGaN heterostructures obtained by PA MBE technique on the silicon substrates with the use of porous silicon as buffer layer In this work, we study the morphology, composition and optical properties of AlGaN epilayers grown by plasma-assisted molecular beam epitaxy on the AlN buffer layer which was performed on regular Si substrate and compliant Si substrate with a preformed buffer porous silicon layer (por-Si) and carbonized porous layer(SiC/por-Si). The AlGaN layers formed on the por-Si buffer revealed a 15% higher intensity of photoluminescence spectra in visible range in comparison with ones formed on regular Si substrate. 10.18721/JPM.163.243 538.9 AlGaN epitaxy buffer layer porous silicon https://physmath.spbstu.ru/article/2023.69.43/

CNF RUS 255-260 0000-0002-4110-1647 Shugabaev Talgat talgashugabaev@mail.ru Gridchin Vladislav gridchinvo@gmail.com Reznik Rodion moment92@mail.ru St. Petersburg State University Khrebtov Artem khrebtovart@mail.ru

St. Petersburg, Russian Federation

Melnichenko Ivan imelnichenko@hse.ru Kulagina Anastasia a.s.panfutova@gmail.com Kotlyar Konstantin konstantin21kt@gmail.com Lendyashova Vera erilerican@gmail.com Kryzhanovskaya Natalia V. Natalia nkryzhanovskaya@hse.ru Cirlin George george.cirlin@mail.ru Quantum dot-induced photoluminescence enhancement of InGaN nanowires In this work, we propose a simple method to enhance the photoluminescence of InGaN nanowires using CdSe/ZnS colloidal quantum dots. It is found that decoration the surface of InGaN NWs with QDs leads to an increase in the integral and peak photoluminescence intensity by more than 3 times. The observed enhancement is attributed to the nonradiative energy transfer between quantum dots and nanowires. 10.18721/JPM.163.244 535.3 InGaN nanowires CdSe/ZnS quantum dots photoluminescence hybrid nanostructures https://physmath.spbstu.ru/article/2023.69.44/

CNF RUS 261-266 Malo Dana malo.dana@mail.ru Moscow Institute of Physics and Technology (National Research University) Lizunova Anna anna.lizunova@gmail.com

Dolgoprudny, Moscow region, Russian Federation

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) Filalova Emilia filalova.em@phystech.edu

Dolgoprudny, Moscow region, Russian Federation

Ivanov Victor ivanov.vv@mipt.ru Ultraviolet photoluminescence enhancement of zinc oxide nanocrystals in colloidal mixtures with spark discharge aluminum nanoparticles Currently, nanoplasmonics is considered one of the most appealing areas of nanophotonics for researchers especially in studies on aluminum as one of the most attractive metal for pushing plasmonics into ultraviolet (UV) devices. Aluminum plasmonics has been shown to be effective for several applications including ultraviolet enhanced fluorescence, optoelectronics, photocatalysis, imaging and biosensing. This work investigated ultraviolet photoluminescence enhancement in mixture colloids of zinc oxide with aluminum nanoparticles. Where aluminum nanoparticles, synthesized by spark discharge method, were with an average size 22.3 ± 7.7 nm and five aluminum colloids with various concentrations of metal from 0.001 to 0.015 g/L were obtained in isopropyl alcohol solution. At the same time, zinc oxide colloids were with two concentrations 0.022 and 0.22 g/L with an average size of the nanocrystals 26.6 ± 7.4 nm. In our research, we have achieved photoluminescence enhancement up to 2.4-fold of zinc oxide emission at wavelength 377 nm in mixture colloids of zinc oxide with aluminum nanoparticles at excitation wavelengths of 300 nm and 325 nm. 10.18721/JPM.163.245 544.7 Photoluminescence (PL) ultraviolet (UV) colloidal mixture spark discharge method aluminum nanoparticles (Al NPs) zinc oxide nanoparticles (ZnO NPs) https://physmath.spbstu.ru/article/2023.69.45/

CNF RUS 267-272 Shiryaev Maksim shiryaevme@bk.ru Ryazanov Roman r.m.ryazanov@gmail.com Sysa Artem sysa.artem@yandex.ru Lebedev Egor dr.beefheart@gmail.com Effect of Al-CuO multilayer thermite structures thickness on combustion behavior This study investigates multilayer structures of Al-CuO formed on the surfaces of sitall substrates using magnetron sputtering. The influence of changing the total thickness of the multilayer structure on the character and speed of the combustion front, characteristics of the reaction products, and gas emission levels is analyzed. Increasing the total thickness of the multilayer structure leads to changes in the speed and behavior of the combustion wave, as well as variations in the quantity, size, and form of the combustion products. The analysis includes theoretical data obtained using the Thermo software and experimental investigations. Gas emission values at different reaction temperatures have been evaluated. 10.18721/JPM.163.246 621.793.182 multilayer structure Al-CuO thermite combustion https://physmath.spbstu.ru/article/2023.69.46/

CNF RUS 273-277 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 0009-0009-4023-6185 Alferov University Pozdeev Vyacheslav pozdeev99va@gmail.com

St. Petersburg, Russian Federation

0000-0002-1571-209X ITMO University Kirilenko Demid demid.kirilenko@mail.ioffe.ru

St. Petersburg, Russian Federation

0000-0002-4894-6503 Alferov University Baranov Artem I. baranov_art@spbau.ru

St. Petersburg, Russian Federation

0000-0001-6869-1213 Alferov University Vyacheslavova Ekaterina cate.viacheslavova@yandex.ru 0000-0002-7632-3194 Alferov University Gudovskikh Alexander gudovskikh@spbau.ru Boron phosphide grown by PECVD and its optical properties This article presents a study of the growth of boron phosphide (BP) thin films by plasma enhanced chemical vapor deposition (PECVD) and its optical properties. BP thin films were deposited on a fused silica and silicon substrates using a mixture of diborane (B2H6) and phosphine (PH3) with hydrogen as precursors. The optical properties were investigated using optical spectroscopy, which showed excellent optical transparency in the visible and near-infrared regions. The BP films exhibited a bandgap of approximately 1.9 eV, indicating its potential for use in optoelectronic applications. The results demonstrate that PECVD is a promising technique for growing BP thin films with desirable optical properties. 10.18721/JPM.163.247 621.315.592 boron phosphide PECVD plasma enhanced chemical vapor deposition optical spectroscopy https://physmath.spbstu.ru/article/2023.69.47/

CNF RUS 278-281 Pesniakov Vladislav v.pesnyackoff@yandex.ru Ignatiev Alexander alexander151957@yandex.ru Nikonorov Nikolay nvnikonorov@corp.ifmo.ru Optical properties of photo-thermo-refractive glasses doped with terbium In this study two types of photo-thermo-refractive glasses were investigated. First one was the classical photo-thermo-refractive glass doped with 0,007 mol.% Ce3+ co-doped with 1 mol.% Tb3+ and the second one did not contain any Ce3+ but only 1 mol.% Tb3+. These types of glass were exposed to the mercury lamp using a cut-off filter that do not transmit wavelengths shorter than 350 nm. After the heat treatment such glasses did not show any plasmon resonance absorption peak. But in samples of photo-thermo-refractive glass without any Ce3+ but only containing Tb3+ plasmon resonance absorption peak corresponded to silver nanoparticles was appeared at 430 nm after mercury lamp exposure without filter and subsequent heat treatment. 10.18721/JPM.163.248 535.341.08 PTR glass plasmon resonance silver nanoparticles terbium https://physmath.spbstu.ru/article/2023.69.48/

CNF RUS 282-287 Moscow Institute of Physics and Technology (National Research University) Kameneva Ekaterina kameneva.ei@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

Moscow Institute of Physics and Technology (National Research University) Filalova Emilia filalova.em@phystech.edu

Dolgoprudny, Moscow region, Russian Federation

Malo Dana malo.dana@mail.ru 0000-0003-4164-178X Moscow Institute of Physics and Technology (National Research University) Kornyushin Denis kornyushin.d@phystech.edu

Moscow, Russian Federation

Ivanov Victor ivanov.vv@mipt.ru Technology of manufacturing thin-film aluminum nanostructures by dry aerosol printing The article under discussion is about technology of creating film structures from aluminum nanoparticles synthesized in spark discharge that can be used for plasmon amplification of the electromagnetic field in the ultraviolet range. Nanostructures of various patterns were applied by dry aerosol printing on a substrate of polished quartz glass. The dependences of the line width on the printing parameters such as focus, speed of sample movement and gas flow were studied. The optimal printing parameters were defined to produce thin-films with different patterns: grids, arrays of lines and uniform distribution of nanoparticles over the surface (films). 10.18721/JPM.163.249 620.3 nanoparticles aluminum plasmonic nanostructures dry aerosol printing https://physmath.spbstu.ru/article/2023.69.49/

CNF RUS 288-293 Levin Alexis levin.alescha2013@yandex.ru Pecherskaya Ekaterina pea1@list.ru Varenik Yuriy yurik_ru@mail.ru 0000-0001-5075-2727 Penza State University Shepeleva Juliya

Penza, Russian Federation

Implementation of electrical impedance tomography The method of electrical impedance tomography, which calculates images of the electrical conductivity inside the body based on surface measurements is considered. The basis of the method is an alternating electric current, which is supplied to various configurations of injecting and detecting electrodes located on the body surface and the potential field that arises in its volume is measured. It is shown that each link of the hardware that implements the electrical impedance tomography method has an impact on the final visualization. The implementation essence of the software part of the method based on the Laplace equation is stated. It is advisable to use the results of the work when monitoring the respiratory and cardiovascular systems using a chest belt with electrodes. 10.18721/JPM.163.250 616-71 EIT ADC biological object impedance https://physmath.spbstu.ru/article/2023.69.50/

CNF RUS 294-300 Antipenko Vladimir v.antipenko7@yandex.ru Pecherskaya Ekaterina pea1@list.ru Tuzova Diana diana.tuzova.02@bk.ru Yakushov Dmitriy hammer.fate@yandex.ru 0000-0002-3240-7222 Penza State University Artamonov Dmitriy dmitrartamon@yandex.ru

Penza, Russian Federation

Development of an automated system for measuring bioimpedance for the study of body composition Bioimpedance analyzers are non-invasive instruments that practitioners use to measure physiological parameters of body composition. The existing technology for measuring bioimpedance is constantly being improved, and more and more commercially available analyzers that do not solve the problems with measurement errors and the information content of the obtained data appear on the market. This article proposes an automated bioimpedance measurement system for studying body composition with a reduced impedance measurement error up to 1% and an increase in the information content of the human body composition due to the expansion of the impedance frequency measurement from 0.3 kHz to 2000 kHz. 10.18721/JPM.163.251 615.47 bioimpedance current source circuit model object https://physmath.spbstu.ru/article/2023.69.51/

CNF RUS 301-306 Shipovskaya Anna Shipovskayaab@yandex.ru Rudenko Daria darudenko@mail.ru Shmakov Sergey ShmakovSL@mail.ru Gegel Natalia gegelno@yandex.ru Optical activity anisotropy in thin films of chitosan L- and D-ascorbate The specific optical rotation [α] of thin films of chitosan L- and D-ascorbate was studied. It was found that optical activity anisotropy occurs in the systems analyzed and [α] depends on the orientation angle θ of the film sample relative to the direction of the polarization vector of the incident light beam in the plane perpendicular to this beam. The angular dependences [α] = f(θ) (indicatrices) were processed to extract the constant term [α]0 and four harmonics ([α]i,  Fourier’s series) determined by structure elements with the corresponding symmetry, namely: the amorphous (isotropic) chitosan phase ([α]0), irregular-shaped structures ([α]1), rod-shaped ones in the film plane ([α]2), helical ones  located perpendicular to the film surface ([α]3), and crystalline structures ([α]4). 10.18721/JPM.163.252 547.458:535.56 chitosan L- and D-ascorbic acid films optical activity anisotropy https://physmath.spbstu.ru/article/2023.69.52/

CNF RUS 307-311 Zaichenko Kirill kvz235@mail.ru Afanasenko Arseniy ar.afanasenko@gmail.com Kordyukova Anna annygm00@mail.ru Denisova Elena Tiranderel@yandex.ru Sevakov Daniil sevakovdaniil@gmail.com Development of an algorithm for preprocessing ultra-high resolution electrocardiosignals The necessity of developing an algorithm for preprocessing ultra-high resolution electrocardiosignals (UHR ECS) is substantiated. The causes of distortion of the useful signal are analyzed, two filtering methods have been developed for cardiac signals obtained from high-frequency (HF) and low-frequency (LF) channels for recording electrocardiograms (ECG). An algorithm for identifying the characteristic points of the ECS, denoted by the Latin letters P, Q, R, S, T, necessary for synchronization has been developed. The efficiency of the presented algorithm is estimated using the processing time of one signal record, as well as using the error matrix and calculating the Recall and Precision parameters. 10.18721/JPM.163.253 004.622 UHR ECS UHR ECG cardiogram algorithm characteristic points signal processing filtering release https://physmath.spbstu.ru/article/2023.69.53/

CNF RUS 312-317 Sidorov Evgeniy siea.18@uni-dubna.ru Troshkina Natalia natik.faier@gmail.com Gribova Elena elena_g67@mail.ru Gladyshev Pavel pglad@yandex.ru Polotnyanko Natalia polot.nat@gmail.com Coating of hydrophilic chalcogenide quantum dots with carboxymethyl chitosan for lateral flow immunoassay applications Quantum dots (QDs) is a class of fluorescent label widely using for biological and biomedical applications. The unique optical properties of QDs make them promising tool as fluorescent markers and analytical labels of proteins. To apply them in biological fluids it is essential to coat QDs with biocompatible polymers. In this research CdTe/CdS/ZnS QDs with mercaptopropionic acid as stabilizer was coated with carboxymethyl chitosan (CMC) by electrostatic interactions. The physicochemical properties of resulting QDs-CMC were studied by absorption and fluorescence spectroscopy, dynamic light scattering and capillary zone electrophoresis. 10.18721/JPM.163.254 543.9, 546.06 quantum dots chitosan immunoassay https://physmath.spbstu.ru/article/2023.69.54/

CNF RUS 318-322 Kuzyaeva Valeriia kuzyaeva.valeriya@mail.ru Sochilina Anastasia ddraig@yandex.ru Savelyev Alexander a.g.savelyev@gmail.com Akasov Roman roman.akasov@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

Fabrication of porous hydrogels containing hyaluronic acid by photoinduced crosslinking Biocompatible hydrogels have gained much attention in tissue engineering, preferably as scaffolds providing the cell attachment and viability in the hydrogel bulk. This requires fabrication of the hydrogels with pores, the sizes of which are in the range of 100-300 µm, most optimal for cell growth. The composition of hydrogels or method of fabrication may affect the formation of porous structure. We prepared hydrogels via photoinduced crosslinking of hyaluronic acid modified with glycidyl methacrylate under irradiation at different wavelengths using two photoinitiators. The hydrogel structure was varied by blending hyaluronic acid derivative with other modified polymers of natural origin (gelatin and pullulan) with grafted vinyl moieties or using filler (sucrose). The most optimal pore sizes for cell growth were obtained for hydrogels derived from modified hyaluronic acid, with the addition of sucrose or processed with the single freeze-thaw cycle. The produced hydrogels demonstrated lack of cytotoxicity with HaCaT cells incorporated inside gel bulk. 10.18721/JPM.163.255 57.084.1 pores scaffolds photoinduced crosslinking biopolymers bioink https://physmath.spbstu.ru/article/2023.69.55/

CNF RUS 323-327 Romanova Veronika venjo@mail.ru Sibirtsev Vladimir sibircev.vladimir@pharminnotech.com Zaitceva Anna anna@da-24.ru Miniature potentiometric system for determination of H+, K+, Na+, Сl–, NO – - and Ca2+ ions in liquid biological environment An intelligent potentiometric system for the analysis of liquid biological environments has been developed and researched. The system consists of a set of 6 miniature measuring cells, including polyvinylchloride-membrane electrodes, selective to the presence of H+, K+, Na+, Ca2+, Cl–, NO– ions in the analyzed solutions, and one central ‘reference’ cell with a chlorosilver reference electrode. For potentiometric measurements of the voltages of our system, an eight-channel analog-to-digital converter was used, which receives a signal from the down conductor of each of the measuring cells and the central ‘reference’ cell. This system was tested with aqueous solutions of НCl, KCl, NaCl, NaNO3 and CaCl2 at concentrations from 10–1 to 10–5 M. This confirmed the usefulness of the developed potentiometric multisensor system for the analysis of the ionic composition of biological environment. 10.18721/JPM.163.256 544.018.2 potentiometry potentiometric sensor ionic composition miniature system biological environment plasticized membranes multisensor system https://physmath.spbstu.ru/article/2023.69.56/

CNF RUS 328-332 Msokar Souhair souhair.msokar@gmail.com Davydov Roman davydovroman@outlook.com Mazing Maria mazmari@mail.ru Isakova Darya isakova.dd@yandex.ru New opportunities for studying the oxygen saturation of blood hemoglobin in capillaries and tissues A new method of express diagnostics of the health state based on the results of non-invasive measurements of the pulse waveform, pulse values, blood pressure, and oxygen saturation of blood vessels and tissues is considered. The feature of these measurements is that they can be carried out both in the hospital and at home (a person can implement them independently). To measure tissue oxygen saturation, a new optical hardware-software complex has been developed, which is compact and portable. The results of experimental studies of various people are presented. 10.18721/JPM.163.257 612.16 oxygen saturation pulse wave blood tissues https://physmath.spbstu.ru/article/2023.69.57/

CNF RUS 333-337 Kharlamova Anastasya kharlamova.anastasya2015@yandex.ru Mathematical modeling of determination of “Premeltons” sites in DNA by ultra short laser pulses The article discusses a method for analyzing the structure of a molecule using ultrashort laser pulses (USP). A premelton or elongation in the structure of a molecule was chosen as a sample for theoretical modeling of the interaction of a laser pulse with a substance. A premelton is a region of a molecule in which the distance between two adjacent nitrogenous bases is increased. The study of such structures is interesting for limiting the parameters of DNA denaturation, since the process of separation of the molecule begins with the elongation region. At the moment, the study of such features of the DNA structure is difficult, electrophoresis and staining methods cannot always give an accurate result, especially on short sections of the molecule. In this paper, we theoretically model the results of the interaction of USP with a molecule in two cases, when elongation takes place and when the molecule is ideal. The results obtained show the expediency of using laser pulses as a method for determining the structure of a complex polyatomic object. 10.18721/JPM.163.258 539.192 ultrashort laser pulses premelton molecule elongation denaturation DNA RNA https://physmath.spbstu.ru/article/2023.69.58/

CNF RUS 338-343 I.M. Sechenov First Moscow State Medical University Ryabkin Dmitrii ryabkin@bms.zone

Moscow, Russian Federation

Suchkova Victoria molodykh1999@gmail.com National Research University of Electronic Technology Gerasimenko Alexander gerasimenko@bms.zone

Moscow, Russian Federation

Development of an algorithm for predicting the strength of laser reconstruction of biological tissue Laser reconstruction of biological tissue is a fast and minimally invasive method of wound closure without the risk of stenosis, foreign body reaction or inflammation. However, the strength of the welds is inferior to the traditional suture method in the first few days after surgery. This limitation can be overcome by optimizing the laser beam and solder component composition using machine learning methods. The aim of the study was to develop and experimentally verify an algorithm for predicting the strength of laser reconstruction of biological tissues. The best prediction models were based on an extreme gradient boosting algorithm and random forest. To train the algorithms, a dataset consisting of experiments described in published research papers was used. The dataset contains a total of 394 samples and 39 features on which training was performed. The effectiveness of the model was tested experimentally in two stages. Bovine ex vivo vascular repair was the first step. The second stage was in vivo testing of the algorithm on laboratory animals. The average percentage error of the strength prediction was 19%. This error is due to the large scatter in the strength values obtained experimentally. The strength obtained is sufficient to analyses the laser radiation characteristics and the component composition of the solder prior to laser reconstruction. 10.18721/JPM.163.259 004.852 machine learning laser soldering tissue reconstruction https://physmath.spbstu.ru/article/2023.69.59/

CNF RUS 344-348 I.M. Sechenov First Moscow State Medical University Ryabkin Dmitrii ryabkin@bms.zone

Moscow, Russian Federation

Suchkova Victoria molodykh1999@gmail.com National Research University of Electronic Technology Gerasimenko Alexander gerasimenko@bms.zone

Moscow, Russian Federation

Modelling of laser welding of biological tissues using focused radiation Laser welding is an alternative technology for biological tissue reconstruction. The laser weld is small, liquid-tight and does not cause mechanical stress. However, thermal necrosis of the joined living tissue occurs during suture formation, and the depth of suture formation may be much less than required. This paper proposes the use of laser radiation with dynamically varying focusing parameters to reduce the area of thermal necrosis of the attached living biological tissue and increase the depth of suture formation. The influence of laser focusing parameters was evaluated by simulation. Absorption by biological tissue and braze was calculated according to the Beer-Lambert law. The degree of protein conversion in biological tissue and solder was determined using chemical kinetic methods and the Arrhenius equation. Heat transfer was calculated using the thermal conductivity equation. 10.18721/JPM.163.260 004.94 mathematical modeling laser soldering tissue reconstruction https://physmath.spbstu.ru/article/2023.69.60/

CNF RUS 349-353 Zanevskaya Maria mnevskaya1@gmail.com Mazing Maria mazmari@mail.ru Zaitceva Anna anna@da-24.ru Romanova Veronika venjo@mail.ru Application of optical methods for quality control of dairy products using data mining A method has been developed for express-assessment of the quality of dairy products according to the indicators of optical sensors in the visible and near-IR wavelength range. The use of modern machine learning methods, in particular the principal component method, made it possible to identify groups of samples similar in their properties and determine whether products belong to an industrial or piece manufacturing method. The technique allows you to designate a group of ‘references’, deviations from it, and is an inexpensive express method for controlling the quality of food products. 10.18721/JPM.163.261 637.073 IR spectroscopy spectrum analyzer dairy products https://physmath.spbstu.ru/article/2023.69.61/

CNF RUS 354-359 0000-0002-0332-1235 Moscow Pedagogical State University Stepanov Maxim stepanov_me@mail.ru

Moscow, Russian Federation

0000-0001-6349-2979 Moscow Pedagogical State University Demina Polina

Moscow, Russian Federation

Akasov Roman roman.akasov@gmail.com Babayeva Gulyalek babaevagulyalek@gmail.com Egorova Tatiyana tv.egorova@mpgu.su 0000-0001-9646-1693 M.M. Shemyakin and Yu.A. Ovchinnikov Institute of bioorganic chemistry of the RAS Generalova Alla

Moscow, Russian Federation

Parodi Alessandro aparodi.sechenovuniversity@gmail.com Khaydukov Evgenii khaydukov@mail.ru In vivo visualization of albumin nanoparticles loaded with cyanine dyes Protein nanoparticles (NPs) based on endogenous biopolymers are promising platform for bioimaging and advanced therapy since they are biocompatible, biodegradable and have low systematic toxicity with high loading capacity. In this work we studied albumin NPs loaded with three cyanine dyes: ICG, IR-806 and IR-820 for colloidal and optical properties. We demonstrated that cross-linked albumin nanoparticles functionalized with IR dyes were promising for optical bioimaging in biotissue transparency window (700-1700 nm). The proposed dye-loaded NPs were of low toxicity in vitro and could be promising for in vivo applications. 10.18721/JPM.163.262 615.45 bioimaging albumin nanoparticles cyanine dyes IR-806 dye https://physmath.spbstu.ru/article/2023.69.62/

CNF RUS 360-365 Rudnykh Sergey rudnih@yandex.ru Gribova Elena elena_g67@mail.ru Kholmurodov Kholmirzo mirzo@jinr.ru Gladyshev Pavel pglad@yandex.ru Polotnyanko Natalia polot.nat@gmail.com Determination of the isoelectric point of the antibody to SARS-CoV-2 by molecular modeling for conjugation with quantum dots Rapid and effective diagnosis is an integral part of the infectious disease control system. One of the promising directions for achieving this goal is the creation of a biosensor device consisting of a biologically active component (antibody) and a fluorescent label that produces an analytical signal. A necessary condition for the conjugation of proteins with a label is the preservation of their specific activity, since this factor determines the reliability of the analysis result. Violation of the ability of antibodies to form a complex with the antigen directly affects the result of the analysis. A fundamental property of antibodies and other proteins is the isoelectric point, which is defined as the pH at which the macromolecule carries no net electrical charge. Knowing the surface charge distribution and the total pI, it is possible to predict the behavior of the antibody-substrate complex. The isoelectric antibodies to Sars-Cov-2 CA521 FALA (PDB code 7e23) equal to 7.4 were calculated using the molecular modeling method using the Amber complex. Based on the results obtained, the covalent conjugation of this antibody with multilayer chalcogenide quantum dots was carried out by carbodiimide binding in combination with sulfo-N-Hydroxysuccinimide. The quantum dot-antibody complex was tested in an immunochromatographic assay and showed a 200% increase in fluorescence in the test and control zones, indicating successful conjugation under pH conditions below the isoelectric point. 10.18721/JPM.163.263 547.96: 54.03 antibodies isoelectric point molecular modeling quantum dots https://physmath.spbstu.ru/article/2023.69.63/

CNF RUS 366-371 Gerasin Ilia i.gerasin@goqrate.com Rudavin Nikita n.rudavin@goqrate.com Moscow Institute of Physics and Technology (National Research University) Kupriyanov Pavel kupriianov.pa@phystech.edu

Moscow, Russian Federation

Dvurechenskiy Alexander dvurechenskii.aa@phystech.edu Shakhovoy Roman r.shakhovoy@goqrate.com Experimental evaluation of imperfections of quantum states for time-bin encoding We propose here a simple method to estimate quality of quantum states for quantum key distribution (QKD) protocols with phase-time encoding. The parameters proposed to estimate the quality of states can be easily measured experimentally and will be useful in setting up and debugging the QKD system. 10.18721/JPM.163.264 535.8 quantum key distribution state preparation time-bin encoding https://physmath.spbstu.ru/article/2023.69.64/

CNF RUS 372-376 Lvov Andrey andrei.lvov1707@yandex.ru Prikhodko Anatoliy anatprikh1995@yandex.ru Shurakov Alexander alexander@rplab.ru Goltsman Grigory goltsman@rplab.ru Reconfigurable reflectarrays for 5/6G wireless systems with linear polarization Numerous studies on wireless technologies for the fifth and sixth generation networks are widely conducted at the moment. They are driven by potential opportunities of digitalization in the information society era. Further enlargement of data transfer rates is required to enhance virtual interactions in various public areas via appearance of new services and applications. In this work, we report on the development of a reconfigurable reflectarray for 5/6G wireless communication systems with linear polarization. The proposed reflectarray utilizes current controlling diodes in a metallic screen inserted in between of front and rear metallizations of a planar patch antenna array. This makes it capable of a digital beam steering on a microsecond scale. Performance of the reflectarray designed for operation at 15 GHz is described in terms of numerical simulations and prototyping. We also discuss prospects and technological challenges of fabricating a scaled-down version of the reflectarray for 150 GHz operation. 10.18721/JPM.163.265 621.396.42 reconfigurable reflectarray 5/6G network wireless channel sub-terahertz communication https://physmath.spbstu.ru/article/2023.69.65/

CNF RUS 377-382 Nazarova Kseniya knazarova0@ya.ru Davydov Vadim davydov_vadim66@mail.ru Creation of an automated system for adjusting the position of the laser radiation axis for the air communication channel A model of an optical system for adjusting the axis of laser radiation on a photodetector module in a plane perpendicular to laser radiation has been developed. The operation of the optical system for controlling the position of the laser radiation axis on the photosensitive layer of the photodetector is simulated. Experimental studies are presented on correcting the position of the plates relative to the direction of the laser radiation axis and the value of stresses to change their refractive indices. The technique for determining the optimal parameters of the plates in the developed optical system for various tasks has been confirmed. The laser axis is automatically corrected and the displacement can be observed in real time. This allows data from other devices to be analyzed to identify the cause of the displacement and take the necessary action. Obtaining information on changes in displacement is a new principle not available in previously developed systems. 10.18721/JPM.163.266 535 Optical system semiconductor laser laser radiation axis quartz plates refractive index linear and quadratic approximations https://physmath.spbstu.ru/article/2023.69.66/

CNF RUS 383-388 Burtsev Vladimir burtsev.vd@phystech.edu Bulatov Nikita separatast@gmail.com Nikulin Anton nikulin.av@mipt.ru Semkin Petr semkin@iss-reshetnev.ru Kuznetsov Stanislav ksa@iss-reshetnev.ru Filonov Dmitry dimfilonov@gmail.com Magneto-electric dipole antenna as a transceive element in a phased array We propose a transceive element of a phased array antenna for satellite communications systems operating in Ku frequency band. The proposed element based on a magneto-electric dipole antenna. A substrate-integrated waveguide and a cruciform slit of a special shape are used as a feeding element. We aim to drive the circular polarization at two sub-bands simultaneously. We performed electromagnetic simulations and optimization of the single element and applied array factor to evaluate beam steering, directivity and cross-polarization. The antenna elements were optimized using 8 criteria to obtain acceptable S-parameters and ellipticity. As a results, we obtain satisfactory cross-polarization for Rx-band of 10.18721/JPM.163.267 537.86 Magneto-electric dipole Antenna Phased Array Sequential Feeding SIW waveguide https://physmath.spbstu.ru/article/2023.69.67/

CNF RUS 389-393 Mikheev Ilya mikheev.ii@phystech.edu Burtsev Vladimir burtsev.vd@phystech.edu Vosheva Tatyana Vosheva.ts@mipt.ru Yusupov Ildar ildar.yusupov@metalab.ifmo.ru Filonov Dmitry dimfilonov@gmail.com Using mobile phone as a ripeness sensor In this paper, the possibility of using a mobile phone as a ripeness sensor is considered. The concept of differentiation based on changes in the dielectric constant of the product as it matures (increase in sugar content) is proposed. A scheme is considered in which one device plays the role of a base station and transmits a Wi-Fi signal at a frequency of 2.4 GHz, and another device uses a specially developed mobile application to analyze this signal and determine by its changes whether a fruit located in the near field of a telephone antenna is edible. The results of the distinctness of different types of products, as well as different degrees of ripeness (unripe/ripe) for one product (avocado) are presented. The sensitivity of the method is also evaluated based on comparison with laboratory measurements using high-quality patch antennas. 10.18721/JPM.163.268 537.86 product ripeness smartphone sensor agriculture smartphone application https://physmath.spbstu.ru/article/2023.69.68/

CNF RUS 394-399 Isupova Ekaterina isupova.e24@mail.ru Shvetsov Sergey shvetsov0000@gmail.com Davydov Vadim davydov_vadim66@mail.ru Improvement of the thermoregulator of the quantum frequency standard on rubidium-87 atoms The necessity of increasing the metrological characteristics of the quantum frequency standard on rubidium-87 atoms is substantiated. It is noted that the main destabilizing factor that reduces the accuracy of frequency determination is temperature. To control it, the quantum standard uses thermostating and thermoregulation. It is established that the systems currently used for laser and optical components cannot provide the necessary temperature stability, which is required to improve the metrological characteristics of the quantum standard. A new circuit of a quantum frequency standard temperature controller with a rubidium gas cell using a PID controller and an instrument amplifier has been developed, and its operation in the LTspice environment has been simulated. Transient processes in the circuit of the thermostat are analyzed. A decrease in the influence of temperature on the optical components and characteristics of the laser in the quantum frequency standard has been established (the signal–to-noise ratio in the recorded optical signal has increased), which, in turn, improves the short-term stability of the QFS frequency by 7-10%, synchronization of time scales in the satellite navigation system, increases the accuracy of determining the coordinates of the object. 10.18721/JPM.163.269 53.06. thermoregulation thermostating quantum frequency standard with rubidium gas cell feedback power amplifier stability differential amplifier PID controller https://physmath.spbstu.ru/article/2023.69.69/

CNF RUS 400-405 Gryaznova Ekaterina katya.gryaznova@mail.ru Semicheva Ekaterina semicheva.ed@edu.spbstu.ru Two-channel fiber-optic communication line for measuring the parameters of active phased antenna arrays in the far zone a landfill conditions The necessity of using fiber-optic communication lines (FOCL) for testing active phased antenna arrays (APAA) in landfill conditions in a complex electromagnetic environment is substantiated. The advantages of FOCL application for working with microwave signals during testing of various antennas especially in the far zone are noted. The developed two-channel FOCL for measuring APAA parameters in the far zone is presented. The choice of the components of the optical system for transmitting microwave signals is justified. The results of the study of the characteristics of the fiber optic and directional patterns of antenna arrays are presented. 10.18721/JPM.163.270 535.8 fiber-optic communication line laser radiation active phased array antenna microwave signal far range dynamic range radiation pattern https://physmath.spbstu.ru/article/2023.69.70/

CNF RUS 406-410 Seliverstov Sergey seliverstovsv@mail.ru Svyatodukh Sergey sergey.svetodux@gmail.com Prikhodko Anatoliy anatprikh1995@yandex.ru Shurakov Alexander alexander@rplab.ru Sheveleva Evgenia sheveleva@phystech.edu Goltsman Grigory goltsman@rplab.ru Optimization of a prism coupler for a THz photonic integrated metamaterial Si waveguide: simulation and experiment The use of terahertz radiation to create data transmission systems with ultra-high transfer rate still remains a kind of terra incognita of our time. The main difficulty in using terahertz radiation for these purposes is associated with high losses in standard metal waveguides at these frequencies. One of the possible solutions is the use of all-dielectric waveguides. So, the coupling waveguides of this type with other devices is an actual and scientifically significant task. In this paper we present the results of simulating and measuring the insertion loss of a coupling prism interface for a terahertz waveguide based on metamaterial high resistive silicon platform. The obtained S21 parameter value of –0.5 dB for a coupler apex width of 90 µm and a coupler length of 3500 µm at frequency of 0.15 THz is in good agreement with the experimentally measured one. These devises will be a part of the future next-generation terahertz data communication system with a high data transfer rate. 10.18721/JPM.163.271 537.876 terahertz photonics waveguide coupling photonic integrated circuit metamaterial waveguide https://physmath.spbstu.ru/article/2023.69.71/

CNF RUS 411-416 Yaropolov Terentiy yaropolov.26012001@yandex.ru Prikhodko Anatoliy anatprikh1995@yandex.ru 0009-0005-6258-9353 Rozhkova Polina pv_rozhkova2@student.mpgu.edu Shurakov Alexander alexander@rplab.ru Goltsman Grigory goltsman@rplab.ru Hardware- and user-induced micromobility effects in in-door radio access at 140 GHz Sub-terahertz frequency band is beneficial for radio access networks of the sixth generation. Due to rather limited power capacity, there appears a necessity to equip transmitters and receivers in sub-terahertz wireless channels with high directivity antennas. This, however, leads to a potential connection failure in response to even a minor linear or angular displacement of a user equipment. This article is focused on a hardware- and user-induced micromobility effects for different scenarios of in-door radio access at carrier frequency of 140 GHz. The developed measurement setup enables fast simultaneous logging of linear and angular displacements of a user equipment with respect to radio access point and the corresponding received signal strength. Experimental data is processed by Allan variance analysis, statistics is acquired for a large number of samples. We believe that our findings should be of use in the development of beam steering solutions for reliable sub-terahertz wireless communications. 10.18721/JPM.163.272 537 user micromobility 6G wireless system sub-terahertz communication https://physmath.spbstu.ru/article/2023.69.72/

CNF RUS 417-422 Boldarev Dmitriy boldarev2001@inbox.ru Arinushkina Kseniya k-arinushkina@mail.ru Valov Anton tony.valov2015@yandex.ru Dmitriev Roman Rusher.official@gmail.com Modernization of quantum frequency standard with optical pumping The development of information transmission systems, satellite navigation systems, metrological service systems lead to the need for constant modernization of the currently used quantum frequency standards (QFS). In radar systems, frequency standards determine the synchronism of work on moving objects. A small frequency deviation from the nominal value leads to large errors, especially when transmitting large data streams. The article presents a method for upgrading QFS in order to improve short-term stability. Experimental studies of the metrological characteristics of QFS with laser optical pumping have shown the effectiveness of the new development. The practical significance of the work lies in the development of an assembly device and the substantiation of new methods for improving the metrological characteristics of QFS. The proposed method for improving the frequency standard can be used for further research in the field of frequency standards. It also found an improvement in metrological characteristics, such as daily frequency stability of the output signal of the frequency standard, by 25%. 10.18721/JPM.163.273 53.081.1 time scale stabilization automatic frequency control frequency stabilizer cesium frequency standard operational amplifier remote sensing spacecraft atomic beam tube https://physmath.spbstu.ru/article/2023.69.73/

CNF RUS 423-427 Fadeenko Varvara v21.07.96@mail.ru Ryzhova Daria qwdarya1234@gmail.com Valov Anton tony.valov2015@yandex.ru Shavshin Artyom shavshin2107@gmail.com Fiber-optic system development for the output frequency setting of a voltage-controlled oscillator at the radar station antenna complex The necessity of introducing fiber-optic communication lines for the frequency tuning codes transmission and frequency regulation is substantiated. A new scheme is presented for constructing the radar station radiation path in the range from 1 to 18 GHz. A functional expansion of the radar station capabilities is presented through the introduction of a modernized radiation path and the study of radiation formations. Fiber-optic lines investigations have been carried out in terms of launching frequency codes and a control channel. The corresponding characteristics have been given. 10.18721/JPM.163.274 537.867 Fiber optic communication line microwave signal radar station radiation monitoring voltage controlled oscillator https://physmath.spbstu.ru/article/2023.69.74/

CNF RUS 428-433 Shavshin Artyom shavshin2107@gmail.com Improving microwave output in rubidium-87 atomic frequency standard with new automatic gain control It’s necessary to upgrade the existing scheme automatic control of the optical signal. The presented design was created to maintain the output power of an atomic frequency standard (AFS) based on rubidium-87 atoms at a given level, correcting changes in its operation introduced by external conditions. An improved circuit for automatic gain control with an additional link in the form of a proportional-integral-derivative (PID) controller and an improved circuit for extracting the ‘error’ signal are presented. A separate contribution of the subtractor and PID controller to the final gain control is considered, and mathematical modeling of microwave devices included in the microwave path is carried out. 10.18721/JPM.163.275 53.06 optical signal atomic frequency standard automatic gain control optical pumping stimulated emission error signal PID controller Allan deviation https://physmath.spbstu.ru/article/2023.69.75/

CNF RUS 434-438 Valov Anton tony.valov2015@yandex.ru Dmitriev Roman Rusher.official@gmail.com Davydov Vadim davydov_vadim66@mail.ru Shavshin Artyom shavshin2107@gmail.com Investigation of a method for improving phase noise in the frequency standard generator block In the modern world, information transmission systems, telecommunication and satellite navigation systems, as well as metrological services play an important role in our lives. However, the development of these systems leads to the constant need to upgrade the currently used quantum frequency standards. To improve the short-term stability of the frequency standard, a new method has been developed to upgrade the oscillator unit and the frequency standard output amplifiers. In the course of experimental studies of the metrological characteristics of the quantum frequency standard based on rubidium-87 atoms, the effectiveness of the new development was shown. 10.18721/JPM.163.276 53.081.1 atomic clock frequency standard phase noise metrology stabilization https://physmath.spbstu.ru/article/2023.69.76/

CNF RUS 439-442 Babukhin Danila dv.babukhin@gmail.com Sych Denis denis.sych@gmail.com Excess leakage of information in quantum key distribution with passive side channels Passive side channels of the photon source make quantum key distribution (QKD) protocols insecure. To restore security, we need to incorporate the leakage through the side channel into the secret key estimate, but there is no definitive way to do that. In this work, we compare several practical methods of secret key rate estimating in QKD protocols with photon distinguishability side channel. We calculate upper bounds on secret key generation rates, using two reinterpretations of eavesdropper excess information – the effective error method and the a-priori loss method. We demonstrate that the effective error method provides tighter upper bound on the secret key rate than a-priori loss. Our results refine the toolbox of estimating security of QKD protocols with passive source side channels. 10.18721/JPM.163.277 535 quantum key distribution source side channels BB84 with decoy states https://physmath.spbstu.ru/article/2023.69.77/