2304-9782, 2618-8686, 2405-7223 15 3.2 2022 1-419

CNF RUS 10-15 0000-0001-7223-7232 Moscow Institute of Physics and Technology (National Research University) Bolshakov Alexey acr1235@mail.ru

Moscow, Russian Federation

0000-0002-3469-5897 Alferov University Kondratev Valeriy kvm_96@mail.ru

St. Petersburg, Russian Federation

0000-0001-6869-1213 Alferov University Vyacheslavova Ekaterina cate.viacheslavova@yandex.ru Morozov Ivan morivan@mail.ru Nalimova Svetlana sskarpova@list.ru 0000-0001-6500-5492 St. Petersburg Electrotechnical University "LETI" Moshnikov Vyacheslav vamoshnikov@mail.ru 0000-0002-7632-3194 Alferov University Gudovskikh Alexander gudovskikh@spbau.ru Study of quasi 1-D silicon nanostructures adsorption properties The work is aimed at study of quasi 1-D silicon nanostructures (nanowires) adsorption properties via electrical impedance spectroscopy. Nanowires were synthesized by cryogen plasma chemical etching and transferred to auxiliary substrate with interdigital gold contacts. Further, nanowires were exposed to air, unsaturated vapors of ammonia and hydrochloric acid aqueous solutions with concentrations about 0.1–1.0 mmol∙l–1 followed by measurement of the nanowires impedance spectra. Changes in the impedance spectra of nanowires upon exposure under analyte vapors are considered in terms of a correlation between the adsorption properties of nanowires and their electrical characteristics. 10.18721/JPM.153.201 538.9 silicon nanowires 1D electrical impedance spectroscopy adsorption properties acid sensor alkali sensor https://physmath.spbstu.ru/article/2022.59.1/

CNF RUS 16-20 0000-0001-7223-7232 Moscow Institute of Physics and Technology (National Research University) Bolshakov Alexey acr1235@mail.ru

Moscow, Russian Federation

Kadinskaya Svetlana skadinskaya@bk.ru 0000-0002-3469-5897 Alferov University Kondratev Valeriy kvm_96@mail.ru

St. Petersburg, Russian Federation

Kindyushov Ivan Kindyushow@gmail.com 0000-0001-7143-6686 Kusnetsov Alexey alkuznetsov1998@gmail.com Lihachev Alexey lihachev_alexey@bk.ru Nashchekin Alexey V. nashchekin@mail.ioffe.ru Study of hydrothermal zinc oxide nanostructures photovoltaic properties Electrical properties of zinc oxide nanostructures were studied in terms of change in the impedance under infrared, red, green, blue, and ultroviolet illumination. Physical interpretation of photoabsorption in ZnO is given, and the prospect of using the synthesized structures as photosensitive elements is shown. 10.18721/JPM.153.202 537.9 hydrothermal synthesis zinc oxide impedance spectroscopy https://physmath.spbstu.ru/article/2022.59.2/

CNF RUS 21-24 Arteev Dmitri ArteevDS@mail.ioffe.ru Sakharov Alexey val@beam.ioffe.rssi.ru Nikolaev Andrei Aen@mail.ioffe.ru Zavarin Evgenii EZavarin@mail.ioffe.ru Tsatsulnikov Andrey andrew@beam.ioffe.ru Submicron Heterostructures for Microelectronics Research and Engineering Center, RAS Ustinov Victor info@ntcm-ras.ru

St. Petersburg, Russian Federation

Optimization of InGaN-based luminescent heterostructures by genetic algorithm A genetic algorithm was employed to optimize the Si doping profile of luminescence InGaN-based heterostructures. It was shown that, in the optimized structure, a ‘parasitic’ luminescence from GaN barrier layers could be suppressed while the efficiency remained the same as that of the best uniformly doped structure. Moreover, the optimized structure had a 2.6 times lower total Si concentration, which could be beneficial in terms of crystal quality of the grown layers. 10.18721/JPM.153.203 621.382 GaN InGaN doping luminescence optimization genetic algorithm https://physmath.spbstu.ru/article/2022.59.3/

CNF RUS 25-30 Ivanov Konstantin kivanov@hse.ru Mintairov Sergei mintairov@scell.ioffe.ru Kalyuzhniy Nikolai nickk@mail.ioffe.ru Kulagina Marina M. Marina.Kulagina@mail.ioffe.ru Maximov Mikhail maximov @beam.ioffe.ru 35379962200 Ioffe Physical Technical Institute of the Russian Academy of Sciences Zhukov Alexey zhukov@beam.ioffe.ru

Russia, 194021, St.Petersburg, Polytechnicheskaya 26

0000-0003-3686-935X National Research University “Higher School of Economics” (St. Petersburg branch) Moiseev Eduard emoiseev@hse.ru Kryzhanovskaya Natalia V. Natalia nkryzhanovskaya@hse.ru Zubov Fedor fzubov@hse.ru Nahorny Aliaksey a.nahorny@ifanbel.bas-net.by Urmanov Boris boris-urmanov@mail.ru Fominykh Nikita A. nfominykh@hse.ru Investigation of far-field patterns of semiconductor microlasers with an active region based on InGaAs/GaAs quantum well-dots This paper is the first study of the far-field patterns of semiconductor microlasers with an active region based on In0.4Ga0.6As/GaAs quantum well-dots. A theoretical model describing the far-field radiation pattern is developed. It is shown that in the vertical direction the radiation pattern has a narrow beam divergence (the most of the power is confined to 20 degrees) and is characterized by narrow lobes, the position and number of which are determined by the height of the waveguide relative to the substrate. It is found that in the horizontal direction, each optical mode has its own far-field pattern. A change in the injection current leads to a change in the dominant optical mode and in the far-field pattern. Deviation of the resonator shape from the circular one leads to chaotization of the peripheral modes and generation through more profound WGM-like modes. Reducing the diameter of the resonator leads to a reduction in the number of lobes of the horizontal radiation pattern. 10.18721/JPM.153.204 538.958 Microlaser quantum dots radiation pattern directional output emission field control far-field emission https://physmath.spbstu.ru/article/2022.59.4/

CNF RUS 31-34 Samusev Anton a.samusev@metalab.ifmo.ru 0000-0001-9792-045X Peter the Great St. Petersburg Polytechnic University Mukhin Ivan muhin_is@spbstu.ru Shkoldin Vitaliy A. shkoldin@spbau.ru Lebedev Denis denis.v.lebedev@gmail.com Permyakov Dmitry d.permyakov@metalab.ifmo.ru Petukhov Anatoliy anatoliy.petukhov@spbu.ru Golubok Alexander aogolubok@mail.ru 0000-0002-3321-7797 Peter the Great St. Petersburg Polytechnic University Arkhipov Alexander arkhipov@rphf.spbstu.ru Ultra-high vacuum formation of silver films for light-emitting tunnel junctions Integrated photonics requires compact electrically driven sources of optical radiation for the use in high-performance integrated circuits with optical interconnections in a chip. Light-emitting tunnel junctions represent a promising option of such nanosized light sources, even if their present quantum efficiency is insufficient for practical implementation. We propose a technique for fabrication of such junctions by ultrahigh vacuum forming of thin silver films. Testing showed a high quality and high optical response of the produced films. Such films can serve as substrates for more complicated tunnel junction structures with yet higher quantum efficiency. 10.18721/JPM.153.205 681.7.069.24 scanning tunneling microscopy tunnel contact emission from a tunnel contact silver film photonics ultrahigh vacuum https://physmath.spbstu.ru/article/2022.59.5/

CNF RUS 35-40 Goltsman Grigory goltsman@rplab.ru Soldatenkova Maria mdsoldatenkova@edu.hse.ru Baeva Elmira M. baeva.elm@gmail.com Triznova Alexandra sashatriznova@gmail.com Titova Nadezhda titovana@mail.ru Zolotov Philip I. zolotov@scontel.ru Kolbatova Anna anna_kardakova@mail.ru Effect of heat dissipation on the current-voltage characteristics of ultrathin NbN nanowires The nonlinear current-voltage characteristics of niobium nitride (NbN) nanowires have been studied experimentally at the vicinity of the resistive transition. We show that the nonlinear behavior of the current-voltage characteristics is in agreement with the thermal model considered the heat dissipation in NbN samples. 10.18721/JPM.153.206 538.9 superconductivity superconducting transition thermal activated phase-slips https://physmath.spbstu.ru/article/2022.59.6/

CNF RUS 41-44 Bakina Ksenia tylxen@gmail.com Zhuk Nadezhda nzhuck@mail.ru Sivkov Victor sivkovvn@mail.ru Nekipelov Sergey nekipelovsv@mail.ru X-ray spectral studies of doped bismuthmagnesium and bismuth-zinc tantalates Solid solutions of bismuth-magnesium tantalates and bismuth-zinc tantalates doped with 3d-metal atoms were studied by XPS and NEXAFS. It was shown that atoms of bismuth, magnesium and zinc in all the compounds under consideration have the charge states Bi3+, Mg2+ and Zn2+, respectively, and the tantalum atoms, in turn, have an effective charge of +(5–δ). 10.18721/JPM.153.207 539.18 bismuth-magnesium bismuth-zinc tantalates https://physmath.spbstu.ru/article/2022.59.7/

CNF RUS 45-50 Briushinin Anatolii anatoliyb2000@mail.ru Davydov Vadim davydov_vadim66@mail.ru Synchronization systems of time scales and frequencies in polar latitudes by meteor radio channel The necessity of using a meteor communication channel as a backup system for determining the coordinates of moving objects in polar latitudes and transmitting information is substantiated. The necessity of using a time scale synchronization system in the meteor communication channel has been established. The reasons that cause a failure in the transmission of information in the meteor communication channel are presented. A model for calculating the shift of time scales in the meteor communication channel is proposed. A method has been developed to reduce random errors and increase the noise immunity of the meteor communication channel. Recommendations are given on the choice of receiver parameters for synchronization with a given accuracy. 10.18721/JPM.153.208 004.942 meteor radio channel meteor synchronization synchronization of time scales synchronization methods duplex method simulation model noise-like signal m-sequence receiver sensitivity registration threshold https://physmath.spbstu.ru/article/2022.59.8/

CNF RUS 51-55 Denisenko Mark dema@sfedu.ru Isaeva Alina isaevaas@sfedu.ru Kots Ivan inkots@sfedu.ru Testing the layout of the rail condition monitoring system using LSTM recurrent neural networks In this paper the solution of the multiclass classification problem of the events recognition during the movement of a bogie model along rails containing defects is described. Testing the layout of the rail condition monitoring system was described. The problem was solved using LSTM recurrent neural networks and implemented by Python programming language. The neural network was trained to classify three type of events used acceleration data. The method of the data collection and the description of the test stand is given. Conclusions about the efficiency of event recognition from a given set are made. 10.18721/JPM.153.209 064.89.032.26 rail defect monitoring neural network multiclass classification problem https://physmath.spbstu.ru/article/2022.59.9/

CNF RUS 56-60 Rudavin Nikita n.rudavin@goqrate.com Gerasin Ilia i.gerasin@goqrate.com Mekhtiev El mekhtiev@phystech.edu Duplinsky Alexey a.duplinsky@goqrate.com Kurochkin Yury yk@goqrate.com Synchronization protocol for MDI-QKD systems Commercial fiber quantum key distribution systems require the implementation of a protocol for synchronizing the frequency synthesizers of the transmitter and receiver nodes. Frequency mismatch may be due to temperature fluctuations, mechanical effects and imperfections in the technological processes. In this work, an algorithm for automatically adjusting Alice's and Bob's frequency to Charlie's frequency is proposed. After optimizing the algorithm parameters, it was tested on optical lines of different lengths. 10.18721/JPM.153.210 535 measurement-device-independent quantum key distribution MDI-QKD synchronization protocol PD controller https://physmath.spbstu.ru/article/2022.59.10/

CNF RUS 61-64 Duplinsky Alexey a.duplinsky@goqrate.com 0000-0003-1511-1128 Khmelev Aleksandr a.khmelev@goqrate.com Merzlinkin Vitalii merzlinkin@yandex.ru 0000-0002-1599-9801 Kurochkin Vladimir v.kurochkin@rqc.ru Kurochkin Yury yk@goqrate.com Influence of polarization reference frame rotation on groundreceiver error rate in satellite quantum key distribution Quantum key distribution (QKD) in a space-Earth communication link is a difficult technical task. Aside from precise mutual pointing of the optical axes during the satellite QKD session, the polarization reference frame coincidence of the satellite and the receiving station is also required. Satellite motion causes a rotation of the polarization reference frame in respect to ground station measurements of quantum states, which contributes to the error rate in time. In order to reduce the quantum bit error rate, we designed and tested a polarization correction device for the receiving ground station that is included as a part of our data analysis and processing module. We have measured the polarization properties of the ground-based receiver and showed the evolution of four polarization states over time for a typical satellite passage. An average polarization extinction ratio is equal to 200:1 for the optical free-space receiver. We have calculated the maximum permitted deviation of the polarization reference frame at the performance of the compensation system, which is less than 5.8 degrees when bit error rate is equal to 1,5%. 10.18721/JPM. 153.211 535.51 Quantum communications quantum key distribution polarimetry extinction ratio optical design photon polarization single photon detectors free-space optics https://physmath.spbstu.ru/article/2022.59.11/

CNF RUS 65-68 Reutov Aleksei aleksey.reutov@phystech.edu Tayduganov Andrey a.tayduganov@goqrate.com QKD and phase modulator imperfections Very often in practical schemes of quantum key distribution various realistic device imperfections are usually neglected. In this work we consider the imperfect phase-modulation encoding that might lead to a potential information leakage and study its effect on the secret key generation rate. 10.18721/JPM.153.212 04.056.55 quantum cryptography QKD state preparation https://physmath.spbstu.ru/article/2022.59.12/

CNF RUS 69-74 0000-0002-2149-2978 Peter the Great St. Petersburg Polytechnic University Studzinskii Vitalii svm.fl@mail.ru 0000-0003-1770-1877 Peter the Great St. Petersburg Polytechnic University Karabeshkin Konstantin Kondrateva Anastasia kondrateva_n@spbau.ru Fedorenko Elizaveta lizasever69@mail.ru P-6861-2015 10041592700 https://orcid.org/0000-0003-2511-0188 Karaseov Platon platon.karaseov@spbstu.ru Mishin Maxim maximvmishin@gmail.com, mmishin@spbstu.ru Ion-beam-induced formation of gold nanostructures on polymethyl methacrylate film In this work, we study the behavior of a thin gold layer on the surface of a polymethyl methacrylate (PMMA) film under irradiation with keV atomic P and molecular PF4 ions. Transformation of both the gold layer and the PMMA film depends on the kind of ions used. Formation of gold nanoparticles is found in all cases. This process is less efficient than in the case of the ion-beam-induced Au layer dewetting on SiO2 substrate. The formation of nanostructured regions in the polymer bulk was also established. The dependence of transmission in the IR range on the stage of formation of nanostructures has been investigated. The PMMA matrix destruction is low as revealed by FTIR investigation. Obtained structures could be used as efficient substrates for surface enhanced Raman scattering studies. 10.18721/JPM.153.213 539.1 gold nanoparticles irradiation with ions polymethyl methacrylate molecular effect nanomaterials polymer https://physmath.spbstu.ru/article/2022.59.13/

CNF RUS 75-79 Cirlin George george.cirlin@mail.ru Lendyashova Vera erilerican@gmail.com Ilkiv Igor fiskerr@ymail.com Borodin Bogdan brborodin@gmail.com Ubyivovk Evgeny ubyivovk@gmail.com Reznik Rodion moment92@mail.ru Talalaev Vadim talalaev@mpi-halle.mpg.de Submonolayer InAs Quantum Dots in Silicon grown by Molecular Beam Epitaxy The fabrication of composite material with embedded III-V quantum dots is of great interest due to promising silicon-based light emitting devices. In this work, the growth of self-assembled InAs quantum dots on Si substrates as well as subsequent capping layer formation by molecular beam epitaxy is presented. The evolution of size, density and shape of QDs are characterized by atomic-force microscopy. Bimodal size distribution of QDs at the submonolayer InAs coverage was observed. Full embedding into silicon matrix and dislocation free crystal structure of InAs QDs were confirmed by transmission electronic microscopy. 10.18721/JPM.153.214 621.315.592 quantum dots semiconductors molecular beam epitaxy https://physmath.spbstu.ru/article/2022.59.14/

CNF RUS 80-85 Slyusarenko Nina sci_box@mail.ru Slyusareva Evgenia eslyusareva@sfu-kras.ru Förster resonance energy transfer from colloidal quantum dots to xanthene dye in polymer film In the work, a system with effective (up to 90%) Förster resonance energy transfer is implemented. The system includes thin gelatin films with embedded CdTe quantum dots (donors) and rose bengal xanthene dye (acceptor). The energy transfer mechanism revealed to be possible due to the high local concentration of fluorophores as well as careful selection of donor and acceptor spectral characteristics. The energy transfer was confirmed by the quenching of the donor photoluminescence in both steady-state and time-resolved measurements. The Stern-Volmer formalism and the Förster theory were used to estimate the constants and efficiency of energy transfer. It was shown that the photoluminescence spectrum of the system can be driven by changing the ratio of the donor-to-acceptor concentration. 10.18721/JPM.153.215 535.37, 538.975, 538.958, 538.935 Förster Resonance Energy Transfer FRET colloidal quantum dots nanocrystals polymer film https://physmath.spbstu.ru/article/2022.59.15/

CNF RUS 86-90 Kondrateva Anastasia kondrateva_n@spbau.ru Komarevtcev Ivan vanec@aport.ru Enns Yakov ennsjb@gmail.com Kazakin Aleksey keha@newmail.ru Mishin Maxim maximvmishin@gmail.com, mmishin@spbstu.ru Effect of noble metal nanoparticles in transition metal oxide magnetron sputtering The purpose of this work is to study the transition metal oxides with metal nanoparticles structures formation features. A design technology is proposed, consisting of the oxide matrix magnetron sputtering, noble metal nanoparticles thermal evaporation and dewetting, and covering it with oxide. Gold nanoparticles, nickel and titanium oxides were used as materials under investigation. Metal-induced catalytic growth of nickel and titanium oxides on gold nanoparticles has been found. It is shown that the top layer being formed has a pronounced texture. During the process, cones are formed with an opening angle of 10–12° and a predominant growth direction coinciding with the crystallographic axis perpendicular to the (111) surface. The optical and electrical characteristics of the formed coatings were studied. The results obtained indicate a broad prospect of using the formed structures in the field of integrated optoelectronic devices. 10.18721/JPM.153.216 620.3 metal-induced catalytic growth noble metal nanoparticle transition metal oxides optoelectronic device https://physmath.spbstu.ru/article/2022.59.16/

CNF RUS 91-96 Boudjemila Linda ariessai21@gmail.com Davydov Vadim davydov_vadim66@mail.ru 0000-0001-5449-4446 Ioffe Institute Aleshin Andrey aleshin@transport.ioffe.ru

St. Petersburg, Russian Federation

Ioffe Institute Malyshkin Vladislav mal@gromco.com

St. Petersburg, Russian Federation

Ioffe Institute Terukov Evgenyi eug.terukov@mail.ioffe.ru

St. Petersburg, Russian Federation

Electrical characteristics of CsPbI3 and CsPbBr3 lead halide Pervoskvite nanocrystal films deposited on Si-c solar cells for high-efficiency photovoltaics The high performance of hybrid solar cells based on nanoparticles to improve optical and electrical performance is the subject of many current studies. For this purpose, nanoparticles of perovskite CsPbI3 and CsPbBr3 are used as their optical properties have provided good interaction with crystalline silicon (Si-c), the absorption coefficient (α) is significantly high in different ranges which increases the generation of photocurrent in the range 370-900nm. The degradation quickly reduces the efficiency and for specific results, developed equipment is reguired. CsPbI3 has shown a textured surface while CsPbBr3 surface is smooth, according to this better measurement for iodine content became possible. 10.18721/ JPM.153.217 539.1 hybrid solar cells nanoparticles optical properties perovskite photocurrent degradation factor https://physmath.spbstu.ru/article/2022.59.17/

CNF RUS 97-101 Litvinov Kirill sva@ulstu.ru Radaev Oleg oleg.radaev.91@mail.ru Kozlikova Irina kozlikova95@mail.ru 0000-0003-4854-2813 Sergeev Viacheslav sva@ulstu.ru Kulikov Alexander kulikovaa36@yandex.ru Algorithm and installation for measuring the current lacing voltage in high-power RF and microwave bipolar and heterojunction bipolar transistors Methods of measuring the current lacing voltage in high-power bipolar (BT) and heterojunction bipolar (HBT) RF and microwave transistors are considered. A method and installation for determining the current lacing voltage in a transistor without introducing the device into the hot spot mode by the steepness of the dependence of the variable component of the voltage at the emitter junction on the collector voltage at a given emitter current and the supply of the sum of linearly increasing and small alternating voltage to the collector is described. A critical drawback of the known methods for determining the voltage of the UKL localization in BT and HBT is that the devices enter the hot spot mode thus the purpose of the work was to develop and experimentally test an algorithm and installation for measuring the voltage of the UKL localization without introducing the device into the hot spot mode. 0.18721/JPM.153.218 621.396.6 microwave bipolar transistor current lacing voltage non-destructive method measurement installation https://physmath.spbstu.ru/article/2022.59.18/

CNF RUS 102-106 Mikhailova Olesya mihajlova.oa@edu.spbstu.ru Antifeev Ivan antifeevie@bk.ru Petrov Dmitriy dimoon88@mail.ru Davydov Roman davydovroman@outlook.com Development of a device for picoampere currents measuring One of the actual topics in microelectronics is the problem of measuring small currents. We have considered possible solutions to this problem, one of which is a current measurement method based on the use of an amplifier with differential inputs. The advantage of this scheme is that the high-precision measuring resistance is divided between two identical elements that are physically installed in the same orientation and at the same distance from the source of magnetic interference. Interference induced on two resistors in this case creates the same signals, which are suppressed at the output of the amplifier. To solve this problem, we have developed a stand for testing a device for measuring picoampere currents. The stand consists of a measuring unit, a digital-to-analog converter module and special software. The measuring unit consists of a differential amplifier stage, followed by a signal amplification circuit on an operational amplifier, the digital-to-analog converter module is implemented on the basis of an external input-output module L-CARD E20-10, and the L-Graph program was used for signal processing. As a result of the experiments, the ranges of measured values were confirmed. 10.18721/JPM.153.219 54.07 picoampere currents current measurement ADC https://physmath.spbstu.ru/article/2022.59.19/

CNF RUS 107-112 Arinushkina Kseniya k-arinushkina@mail.ru Valov Anton tony.valov2015@yandex.ru Davydov Vadim davydov_vadim66@mail.ru Improving metrological characteristics of a frequency standard based on cesium atoms The necessity of constant modernization of quantum frequency standards (QFS) - atomic clocks, which are used in satellite navigation and telecommunication systems to solve new problems in terms of the speed of transmission of large amounts of information, etc., is substantiated. It is noted that among all atomic clocks, cesium QFSs occupy a special place. These standards are the primary frequency reference upon which the international time scale is based. The main goal of all QFS upgrades is to improve the metrological characteristics. In the case of its use on moving objects, its dimensions, weight and power consumption also become important characteristics. The article presents one of the options for reducing the influence of negative factors on the stability of the QFS. The problem of modernizing the cesium frequency standard by including a device for monitoring and stabilizing the temperature regime of its operation is considered. 10.18721/JPM.153.220 53 time scale stabilization automatic frequency control frequency stabilizer cesium frequency standard operational amplifier atomic beam tube https://physmath.spbstu.ru/article/2022.59.20/

CNF RUS 113-117 Trofimov Pavel p.trofimov@metalab.ifmo.ru Ivanova Tatyana tatyana.ivanova@metalab.ifmo.ru Lazarenko Petr aka.jum@gmail.com Fedyanina Maria mfh.miet@gmail.com Sinev Ivan i.sinev@metalab.ifmo.ru Phase-change periodic surface structures for engineering of excitonic photoluminescence in WS2 monolayers Due to their two-dimensional nature, transition metal dichalcogenide monolayers exhibit extremely strong sensitivity of their excitonic response to the permittivity of the surrounding medium. Here, we show that the intensity and wavelength of their excitonic photoluminescence can be spatially modulated by periodic structures induced by laser pulses in phase change material films. 10.18721/JPM.153.221 535.015 phase change materials Ge2Sb2Te5 transition metal dichalcogenides WS2 laser induced periodic surface structures phase change gratings exciton screening https://physmath.spbstu.ru/article/2022.59.21/

CNF RUS 118-123 Goldberg Artemiy artemiy.goldberg@mail.ru Kochetkov Igor K.Igor.D@yandex.ru Davydov Vadim davydov_vadim66@mail.ru Research on the character of laser radiation propagation in a differential Anderson cuvette The necessity of studying the nature of the propagation of laser radiation in the Anderson differential cuvette is substantiated in order to determine the optimal design parameters of a small-sized differential type refractometer. The construction of the Anderson differential cuvette is considered. A new method for studying the nature of the propagation of laser radiation in the differential Anderson cuvette is proposed. The trajectory of movement of the maximum of the laser radiation directive pattern in the cuvette, as well as beyond it (up to the sensor of the photodiode ruler on which the registration takes place) is plotted. An equation is obtained to study the changes in the nature of the propagation of laser radiation from various parameters of the differential cuvette, the reference liquid medium and the investigated liquid medium. A polynomial of the 12th degree is formed to obtain an analytical solution of the equation from the refractive index of the investigated medium. 10.18721/JPM.153.222 535.8 laser radiation refraction liquid refractive index Anderson's cuvette refraction displacement polynomial https://physmath.spbstu.ru/article/2022.59.22/

CNF RUS 124-129 Peter the Great St. Petersburg Polytechnic University Provodin Daniil provodindanya@gmail.com

St. Petersburg, Russian Federation

Davydov Vadim davydov_vadim66@mail.ru New technique for control of liquid media state by optical method in express mode The necessity of express control of the state of liquid media in real time is substantiated. Various methods of express control of the state of liquid media are considered. The basic requirements for these methods are determined. An optical method for monitoring the state of liquid media using the phenomenon of refraction is presented. The use of a small-sized differential-type refractometer for express control of the state of liquid media is substantiated. Its design has been developed and a new principle for measuring the refractive index of the investigated liquid has been proposed. The results of experimental studies are presented. 10.18721/JPM.153.223 535.8 refraction express-control laser radiation liquid refractive index differential cuvette of Anderson medium state https://physmath.spbstu.ru/article/2022.59.23/

CNF RUS 130-134 Alymov Georgy alymov@phystech.edu Impact of the current pulse width on the speed of metal-insulator transition in VO2 nanobeams VO2 undergoes an insulator-metal transition at ~ 68 °C, making it an attractive material for the development of tunable metasurfaces, steep-switching transistors, neuristors and other devices. Applications such as wireless communications call for ultrashort transition times, which are believed to be typically limited by heat dissipation. We consider the negative role of heat accumulation in the substrate, which slows down recovery after long heating pulses. Thermal simulations of VO2 nanobeam gratings show that they can display two different behaviors: single-nanobeam-like in the short-pulse regime and film-like in the long-pulse regime. In the long-pulse regime, the recovery time depends linearly on the pulse duration and approximately quadratically on the hysteresis width, in agreement with analytical expressions. In the short-pulse regime, the dependence is much weaker. To achieve nanosecond recovery times, either the short-pulse regime must be used (pulse duration less than the time constant of heat diffusion between adjacent nanobeams), or hysteresis must be eliminated (e. g., by doping). Our results quantify the impact of the pulse duration and hysteresis on the switching time of VO2 devices, clarify the conditions under which these factors are important, and therefore can guide the development of fast electronic/optoelectronic devices based on phase-change materials. 10.18721/JPM.153.224 538.975 vanadium dioxide metal-insulator transition nanobeams nanowires hysteresis heat transfer https://physmath.spbstu.ru/article/2022.59.24/

CNF RUS 135-139 Saratov State University Kozlowski Alexander kozlowsky@bk.ru

Saratov, Russian Federation

Stetsyura Svetlana stetsyurasv@mail.ru Dependence of light-addressable potentiometric sensor sensitivity on photo-induced processes in Si The effect of photoelectron processes in n-Si and p-Si during the fabrication of the "Si/SiO2/SiNx/polyethyleneimine/glucose oxidase" sensor structure on the glucose sensitivity of a light-addressable potentiometric sensor (LAPS) depending on SiNx thickness was investigated. It was found that the illumination of the n-Si-based structure during the adsorption of the glucose oxidase enzyme doubles the sensitivity to glucose compared to the adsorption of glucose oxidase in the dark, and the best effect from photostimulated adsorption is achieved at a SiNx layer thickness of ~ 50 nm. At the same time, the sensitivity to D-glucose, measured in the LAPS mode, is 45% higher than the sensitivity of the capacitive sensor. Illumination of p-Si during glucose oxidase adsorption resulted in a slight decrease in sensor sensitivity. The results are explained by a change in the density of immobilized glucose oxidase molecules due to a change in the electrostatic forces of attraction between enzyme molecules and semiconductor upon illumination and photoinduced charge stabilization on the surface electronic states of the Si/SiO2 and SiNx/polyethyleneimine interfaces in the case of photostimulated glucose oxidase adsorption. 0.18721/JPM.153.225 538.971 Semiconductor sensor structures silicon nitride illumination light-addressable potentiometric sensor https://physmath.spbstu.ru/article/2022.59.25/

CNF RUS 140-144 Belozerov Igor igas2580@yandex.ru Uvarov Ilia i.v.uvarov@bk.ru Performance optimization of the cantilever-based MEMS switch Microelectromechanical system (MEMS) switches combine advantages of electromagnetic and semiconductor relays. However, a number of problems prevent the widespread use of these devices. One of them is high actuation voltage. In this work, voltage reduction is achieved by optimizing the shape of the electrodes. The switch is simulated by the finite element method. Dependences of the actuation voltage on the geometric parameters are obtained. The proposed shape of the electrodes reduces the voltage by almost two times compared to conventional design without deterioration of other working characteristics. 10.18721/JPM.153.226 621.3 MEMS switch cantilever actuation voltage finite element method https://physmath.spbstu.ru/article/2022.59.26/

CNF RUS 145-149 Kazakin Aleksey keha@newmail.ru Enns Yakov ennsjb@gmail.com 0000-0002-0061-6687 Alferov University Uvarov Alexander lumenlight@mail.ru Nikitina Ekaterina mail.nikitina@mail.ru Fabrication and investigation of UV photodiode based on n-GaN / p-NiO heterojunction This paper presents the experimental results of the study of n-GaN/p-NiO heterojunction for application as a selective UV photodetector. Synthesis of n-type GaN layers was carried out by plasma-assisted molecular beam epitaxy (PA MBE) on GaN/c-Al2O3 template substrates. The p-type layers were formed by reactive DC magnetron sputtering of NiO films followed by annealing. Post-annealing in an oxygen atmosphere at a temperature of 550 °C was used to improve the crystallinity of the deposited NiO films. The optical and electrical characteristics of individual semiconductor layers and n-GaN/p-NiO diode structure were studied. Photoluminescence spectra of GaN layers showed the presence of a narrow peak near 3.43 eV. The optical band gap of the NiO layers, determined by the edge of optical absorption, was 3.35 eV. The study of the n-GaN/p-NiO heterojunction current-voltage characteristics under light and dark conditions showed the selective sensitivity of the diode structure to UV radiation. Furthermore, the manufactured structure demonstrated the behavior of a self-powered photodiode. At a wavelength of 365 nm, the detectivity of the photodiode was 6.8∙109 Jones and the photoresponsivity was 3.64 mA/W. 0.18721/JPM.153.227 621.383 UV photodiode gallium nitride oxide semiconductors DC magnetron sputtering molecular beam epitaxy https://physmath.spbstu.ru/article/2022.59.27/

CNF RUS 150-154 0000-0002-0061-6687 Alferov University Uvarov Alexander lumenlight@mail.ru 0000-0002-4894-6503 Alferov University Baranov Artem I. baranov_art@spbau.ru

St. Petersburg, Russian Federation

0000-0002-3503-7458 St. Petersburg Electrotechnical University "LETI" Maksimova Alina A. deer.blackgreen@yandex.ru 0000-0001-6869-1213 Alferov University Vyacheslavova Ekaterina cate.viacheslavova@yandex.ru 0000-0002-7632-3194 Alferov University Gudovskikh Alexander gudovskikh@spbau.ru Study of recombination and transport properties of a-Si:H(i)/ μc-Si:H(n) contact system for crystalline silicon solar cells This article is devoted to the study of the contact and recombination properties of the combination of a-Si:H(i)/μc-Si:H(n) layers. Numerical modeling of the band diagram as well as experimental study of the contact system with a silicon substrate has been carried out. The optimal values of the thicknesses of the contact layers are determined, which make it possible to obtain a low rate of carrier recombination and contact resistance. 10.18721/JPM.153.228 621.315.592.3 solar cells silicon amorphous silicon effective lifetime https://physmath.spbstu.ru/article/2022.59.28/

CNF RUS 155-160 Davydov Maxim mdavydov2010@mail.ru Davydov Vadim davydov_vadim66@mail.ru Cherkassova Regina rcherkasova01@mail.ru Development of a small-sized NMR relaxometer for express monitoring of the state of the liquid medium The necessity of developing devices for express monitoring of the state of the liquid medium at the sampling site is substantiated. The criteria for express control methods are substantiated. A design of a small-sized NMR relaxometer for express monitoring of the state of the medium has been developed. Experimental data are presented. The results obtained on the proposed small-sized NMR relaxometer were compared with the values obtained on an industrial NMR relaxometer. 10.18721/JPM.153.229 53.082.79 express control NMR nuclear magnetic resonance instrumentation relaxometer NMR relaxometer measuring equipment https://physmath.spbstu.ru/article/2022.59.29/

CNF RUS 161-166 Savin Danila savin_danila00@mail.ru Davydov Vadim davydov_vadim66@mail.ru Generator of highly stable microwave signals with low phase noise The problems arising in various communication systems, determining coordinates, generating positional signals and others due to phase shifts between reference signals are considered. The necessity and relevance of the development of high-precision multichannel microwave generators is shown. The block diagram of the device is given. Active elements are selected that provide a given level of phase noise. The design of the generator of highly stable oscillations has been developed. The results of simulation of the operation of the generator during the formation of signals at a frequency of 100 MHz are presented. 10.18721/JPM.153.230 53.087 generator microwave signal synchronization system channel phase noise stabilization signal amplitude https://physmath.spbstu.ru/article/2022.59.30/

CNF RUS 167-171 Gafurov Eldar eldar.gafurov88@gmail.com Smirnov Evgenii dep5@vniitf.ru Reliability of 808 nm QCW laser diode arrays The dependence of radiative characteristics of 808 nm QCW laser diode arrays (LDAs) on power supply modes and thermostabilization temperature was studied. The accelerated lifetime test method is suggested at 6% duty cycle exceeding the nominal value by a factor of 2.5 and at two emitter junction temperatures of 65.0ºC and 82.5ºC. Accumulated total LDA operation time in the accelerated mode was more than 7.0·108 pulses that allows predicting LDA operation time to be nearly 3.5·1010 pulses in nominal power supply modes (i.e. more than 60 thousand hours or 7.0 years of continuous work at 100 Hz frequency). 10.18721/JPM.153.231 535.8 reliability QCW laser diode arrays Arrhenius model accelerated lifetime tests https://physmath.spbstu.ru/article/2022.59.31/

CNF RUS 172-177 0000-0003-2282-3895 Savelyev Dmitry Dmitry dmitrey.savelyev@yandex.ru The comparison of the optical vortices focusing by silicon diffraction axicons and ring gratings with variable relief heights using high-performance computer systems A study was made of the spatial distribution of the intensity of the Laguerre-super-Gaussian (1,0) modes with circular, radial and azimuthal polarization depending on the change in the height of silicon subwavelength optical elements, the height of which varied from 0.2 to 3 wavelengths. Simulation by the finite difference method in the time domain showed that a change in the height of the considered optical elements significantly affects the diffraction pattern in the near zone. The smallest focal spot size was obtained for "-" circular polarization at an element height equal to two wavelengths. 10.18721/ JPM.153.232 535.42 optical vortices sub-wavelength structures FDTD high performance computer systems ring gratings https://physmath.spbstu.ru/article/2022.59.32/

CNF RUS 178-183 Popovskiy Nikita nikitanikita24@mail.ru Davydov Vadim davydov_vadim66@mail.ru Rud Vasiliy rudvas.spb@gmail.com Features of construction of fiber-optic communication lines with orthogonal frequency-division multiplexing The necessity of studying the features of building fiber-optic communication lines with multiplexing using orthogonal frequency division of channels is substantiated. The main properties of such systems are considered, as well as ways to improve operational characteristics to improve the quality of communication and economic benefits are studied. The necessity of developing such systems for future use in optical transport networks, cloud and high-performance computing systems is substantiated. 10.18721/JPM.153.233 535.8 large volumes of information fiber-optic communication line multiplexing non-linear distortions system bandwidth https://physmath.spbstu.ru/article/2022.59.33/

CNF RUS 184-189 Kashapov Artem ar.kashapov@outlook.com Bezus Evgeni evgeni.bezus@gmail.com Bykov Dmitry bykovd@gmail.com Golovastikov Nikita nikita.golovastikov@gmail.com Doskolovich Leonid leonid@ipsiras.ru Broadband light absorbers based on multilayer metal-insulator-metal structures We study optical properties of multilayer resonant metal-insulator structures. It is shown that a simple three-layer metal-insulator-metal (MIM) structure can provide near-perfect absorption of light (more than 90%) in a 732 nm-wide wavelength range. We demonstrate that by making the MIM structure slightly more complex by adding additional layers and optimizing their thickness, it is possible to broaden the near-perfect absorption band by almost a factor of two, covering the visible, near ultraviolet and near-infrared wavelength ranges with an average absorption level of 98.5%. Both structures provide a considerably low sensitivity to changes in the angle of incidence of the incident light. The obtained results can be applied for solar energy harvesting, photovoltaics and thermophotovoltaics, absorption filtering, and sensing. 10.18721/JPM.153.234 535.3 broadband light absorption metal-insulator structures resonant diffractive structures https://physmath.spbstu.ru/article/2022.59.34/

CNF RUS 190-195 Ignatev Andrei dep5@vniitf.ru Fomin Alexey dep5@vniitf.ru Usmanov Sergey dep5@vniitf.ru Wavelength stabilized laser module for highpower fiber laser pumping The paper presents the results of development of wavelength stabilized laser modules where wavelength stabilization is achieved due to volume Bragg gratings with a 976 nm operating wavelength. The module was designed to spatially combine the light from six high-power laser diodes with its subsequent coupling into a silica fiber with a core diameter of 105 μm and a numerical aperture of 0.15. Stabilization scheme was realized, where volume Bragg gratings were placed behind the lenses used for light collimation along the slow axis. Laser diode performance was studied for volume Bragg gratings with different reflectivity factors. The measurement results were used to determine optimum reflectivity of volume Bragg gratings; the spectral and power characteristics of the manufactured laser module were measured. The volume Bragg gratings allowed for significant, down to 0.5 nm, narrowing of the laser module spectrum width and wavelength stabilization over the entire range of operating currents. In continuous mode, the manufactured laser module power reached 43.6 W at a pumping current of 10 A and a thermal stabilization temperature of 25°C. 10.18721/JPM.153.235 621.373.826 high-power laser diodes volume Bragg grating volume holographic grating wavelength stabilization https://physmath.spbstu.ru/article/2022.59.35/

CNF RUS 196-200 Lebedeva Elizaveta narniyall02@gmail.com Sedykh Ksenia kseniaolegovna98@gmail.com Venediktov Iliia ilia1999ven@gmail.com Goltsman Grigory goltsman@rplab.ru Sych Denis denis.sych@gmail.com Detection of orbital angular momentum of light by forked diffraction method Orbital angular momentum (OAM) is a characteristic of wave describing its spiral phase front. These waves can be applied in various fields such as quantum communications and computations, hence, there is a need for a compact and simple method of its generation and detection. Here we describe an experimental realization of OAM light beams via the forked diffraction method. 10.18721/JPM.153.236 535.015 orbital angular momentum (OAM) vortex light detection computer-generated holographic gratings topological charge https://physmath.spbstu.ru/article/2022.59.36/

CNF RUS 201-205 Shakhovoy Roman r.shakhovoy@goqrate.com Maksimova Elizaveta e.maksimova@goqrate.com Gain-switched VCSEL as a quantum entropy source: the problem of quantum and classical noise We consider the problem of quantum noise extraction from polarization swapping in a gain-switched VCSEL. The principle of operation of a quantum random number generator is based on the generation of laser pulses with one of two orthogonal polarization states, followed by digitization of polarization-resolved pulses with a comparator. At intensity values of laser pulses close to the threshold value of the comparator, the contribution of the classical noise of the photodetector will have a crucial role in making a decision on the choice of a logical zero or one. We show how to evaluate the contribution of classical noise and how to calculate the quantum reduction factor required for post-processing. 10.18721/JPM.153.237 621.373.8 quantum random number generators vertical surface emitting laser quantum noise extraction https://physmath.spbstu.ru/article/2022.59.37/

CNF RUS 206-211 Naumova Victoria Naumova.vv@edu.spbstu.ru Davydov Vadim davydov_vadim66@mail.ru Mazing Maria mazmari@mail.ru Zaitceva Anna anna@da-24.ru New method of processing measurement results of tissue oxygen saturation abnormalities The necessity of monitoring the oxygen status of human tissues to detect various diseases at different stages is substantiated. A noninvasive intelligent blood filling control complex for lower limb ischemia using a multisensory system based on optical sensors and machine learning methods is presented. The results are presented, indicating the possibility of automated detection of deviations from the norm of the parameters of blood filling of the extremities. 10.18721/JPM.153.238 535.243.25 intellectual complex oxygen status laser radiation pulse lower limb ischemia machine learning https://physmath.spbstu.ru/article/2022.59.38/

CNF RUS 212-217 Kurkova Alexsandra alexsa99k@gmail.com Davydov Vadim davydov_vadim66@mail.ru Veracity of the method of detecting scattered laser radiation for content measuring of particulate matter in air The problem of measuring the parameters of dust particles in the environment is currently relevant for residents of densely populated cities. Measurements of the size and size distribution function of dust particles are carried out using instruments based on the method of scattering of laser radiation. The analysis of the measurement method based on the spherical particle model and the theory of Mie diffraction theory is carried out. The indicatrices of laser radiation scattering by particles 2.5 and 10 μm in size are calculated. The size distribution function of particles is estimated under the condition that the intensity of scattered laser radiation is measured for at least two scattering angles. The possibility of erroneous indication of measurement results by widely used portable measuring devices for dust parameters is shown. 10.18721/JPM.153.239 535.361.12 particle concentration air pollution particulate matter PM2.5 Mie scattering theory scattering indicatrix particle size distribution https://physmath.spbstu.ru/article/2022.59.39/

CNF RUS 218-223 Dmitrieva Diana dmitrievadiana1405@gmail.com Davydov Vadim davydov_vadim66@mail.ru Development of the radiation situation monitoring system based on fiber-optic sensors for pools of nuclear power plants The necessity of development of the remote monitoring system of the radiation situation based on fiber-optic sensors for pools of nuclear power plants is substantiated. New method of building of communication line with fiber-optic sensor for controlling exposure dose of radioactive radiation in the large range of changes (several orders of magnitude) in remote mode is suggested. The design of sensor to provide measurements for long distance (more than 10 km from the location of the monitoring center) is developed. Functional capabilities of the fiber-optic sensor are identified. Experimental results are presented. 10.18721/JPM.153.240 53.087.44 fiber-optic sensor exposure dose fiber optic communication line laser radiation γ-radiation spray pools https://physmath.spbstu.ru/article/2022.59.40/

CNF RUS 224-228 Sych Denis denis.sych@gmail.com Venediktov Iliia ilia1999ven@gmail.com Sedykh Ksenia kseniaolegovna98@gmail.com Zolotov Philip I. zolotov@scontel.ru Kaurova Natalia kaurova@scontel.ru Lebedeva Elizaveta narniyall02@gmail.com Goltsman Grigory goltsman@rplab.ru Fabrication of diffraction gratings for generation of OAM light In this work we describe fabrication of diffraction gratings for generation of light with orbital angular momentum (OAM). OAM light characterized by topological charge l and modes with different l are orthogonal, which makes OAM light useful in quantum communication and tomography. We demonstrate fabrication route of diffraction gratings with computer generated hologram pattern on sapphire substrate and niobium reflective coat for generation of OAM light of visible spectrum. 10.18721/JPM.153.241 535.44 rbital angular momentum (OAM) vortex light computer-generated holograms (CGH) https://physmath.spbstu.ru/article/2022.59.41/

CNF RUS 229-234 Lukashev Nikita n-lukash@list.ru Davydov Vadim davydov_vadim66@mail.ru New optic system for low mass 199Hg ion clock The necessity of modernization of quantum frequency standards (QFS), atomic clocks, which are used in satellite navigation and telecommunication systems, is substantiated. The main goal of all QSC upgrades is to improve the metrological characteristics. In the case of its use on moving objects, its dimensions, weight and power consumption also become important characteristics. The new developed optic system has been applied to low mass ion clock prototype. With its help it has become possible to significantly take up short term stability and temperature coefficients. The prospects for using this design in various moving objects are considered. 10.18721/JPM.153.242 53.043 time scale optical system mercury ions atomic clock stabilization automatic frequency control https://physmath.spbstu.ru/article/2022.59.42/

CNF RUS 235-239 Baryshnikova Kseniia k.baryshnikova@metalab.ifmo.ru Sergaeva Olga o.sergayeva@metalab.ifmo.ru ITMO University Petrov Mihail m.petrov@metalab.ifmo.ru

St. Petersburg, Russian Federation

Silicon nanoantenna for controlling the polarization direction of radiation from standalone quantum light source The emission control of standalone quantum sources has recently attracted the interest of the scientific community due to the growing technological capabilities for fabrication and on-demand positioning of these emitters. Here we report on simulation of silicon-oninsulator prismatic nanoantenna possessing resonantly induced bianisotropy that provides a strong dependence of its emission on the location of the quantum emitter inside the system. Obtained results could potentially be used in sensing, nanoscale light control, and quantum computing applications. 10.18721/JPM.153.243 535.015, 535.58 quantum islands silicon nanoantenna radiation pattern numerical simulation nanophotonics https://physmath.spbstu.ru/article/2022.59.43/

CNF RUS 240-245 Shurupov Dmitry shurupoff.dm@yandex.ru Pchelkin Grigoriy beegrig@mail.ru Demidov Vladimir demidov@goi.ru Davydov Vadim davydov_vadim66@mail.ru Vakorina Daria cementary.ley@gmail.com Hollow-core antiresonant optical fiber activated with YAG:Yb3+ This article presents methods for modifying the structures of an antiresonant optical fiber with a hollow cardiovascular system, with the help of which it is possible to detect a large number of active substances without resorting to the ways and technological processes of cardiovascular diseases. To obtain luminescence centers, a hollow antiresonant fiber is bound to capillaries with a solution of a YAG:Yb3+ composite and an organic solvent of dimethylformamide. After the procedure, several processing options are identified that cause the stocks of blanks to dry under normal conditions at a temperature of 150 °C and heat treatment at a temperature of 1000 °C. As a result, film tissues based on YAG:Yb3+ were formed inside the capillaries. The obtained luminescence peaks in the main and one of the additional peaks for YAG:Yb3+. 10.18721/JPM.153.244 535 hollow core antiresonant optical fiber activated optical fiber luminescence https://physmath.spbstu.ru/article/2022.59.44/

CNF RUS 246-252 Logunov Semen sema-logunov@ya.ru Davydov Roman davydovroman@outlook.com Davydov Vadim davydov_vadim66@mail.ru Development of a fiber-optic system for monitoring the state of oxygen activity in the current flow of the coolant The need to develop an optical system for remote monitoring of the state of the coolant in the current flow in the first circuit of the nuclear reactor of a nuclear power plant has been substantiated. A method for monitoring the state of the coolant by changing the nature of the evolution of oxygen activity is presented. A fiber-optic system has been developed to study the nature of the change in the evolution of the oxygen activity of the coolant in the current flow. The results of the study of the evolution of oxygen activity in the current flow of the coolant are presented. The nature of the change in the evolution of oxygen activity in the event of the ingress of foreign particles into the coolant (carbon steel particles from welded joints) is determined. 10.18721/JPM.153.245 535.92 fiber-optic system oxygen activity coolant https://physmath.spbstu.ru/article/2022.59.45/

CNF RUS 253-256 Rodin Sergei psnp.174.sut@gmail.com Davydov Vadim davydov_vadim66@mail.ru Reznikov Bogdan rznkff@gmail.com Isaenko Dmitry isaenko-d@mail.ru Vakorina Daria cementary.ley@gmail.com Optical communication channel for multifunctional ecological monitoring complex The necessity of transmitting information from a multifunctional complex for environmental monitoring located on a high-voltage power line via a fiber-optic communication line is substantiated. The features of the transmission of this information are noted. A fiberoptic communication line has been developed to transmit information over distances up to 200 km without the use of optical amplifiers. The research results of its main characteristics are presented. The prospects for further use of this type of FOCL are determined. 10.18721/JPM.153.246 681.7 environmental monitoring information transmission electromagnetic environmental optical communication line losses time separation of information dispersion https://physmath.spbstu.ru/article/2022.59.46/

CNF RUS 257-262 Kamalov Almaz 1.almaz.kamalov@gmail.com Kolbe Konstantin kkolbe@yandex.ru Pavlov Andrey pavlov.aa.hv@mail.ru Borisova Margarita Yudin Vladimir yudin@hq.macro.ru Activation of polylactide films by cold plasma dielectric barrier discharge to improve the interaction of fibroblasts This work focuses on DBD (dielectric barrier discharge) surface modification of polylactide (PLA) films. The film samples were treated in a cold plasma in order to optimize their biological properties and interaction with human skin fibroblasts. Optimal film processing modes for the increased proliferative activity of cells have been found. 10.18721/JPM.153.247 537.525 DBD plasma polylactide fibroblast modification contact angle https://physmath.spbstu.ru/article/2022.59.47/

CNF RUS 263-268 Zhurina Angelina gelya.zhurina@mail.ru Pecherskaya Ekaterina pea1@list.ru Fimin Andrey mr.l0tus@mail.ru Zinchenko Timur scar0243@gmail.com Penza State University Kozlov Gennady politeh@pnzgu.ru

Penza, Russian Federation

Polarization and electrophysical parameters of piezoceramic materials investigation The effect of temperature and electric field strength on the polarization and dielectric relaxation of the Ba0.85Ca0.15Zr0.1Ti0.9O3 piezoceramic material has been studied. Experimental studies were carried out using the automated information-measuring system developed by the authors. It is based on the modified Sawyer–Tower circuits, which make it possible to measure the hysteresis loops of the polarization dependences on the electric field strength in the ferroelectric phase at different temperatures. 10.18721/JPM.153.248 53.096 temperature polarization piezoceramics https://physmath.spbstu.ru/article/2022.59.48/

CNF RUS 269-273 Vakulov Zakhar zakhar.vakulov@gmail.com Tominov Roman tominov@sfedu.ru Dzyuba Dmitry dmdzyuba@sfedu.ru Shihovcov Ivan shihovcov@sfedu.ru Smirnov Vladimir vasmirnov@sfedu.ru Southern Federal University Ageev Oleg ageev@sfedu.ru

Taganrog, Russian Federation

Ferroelectric films for renewable energy This paper shows the results of the development of an energy harvester based on hybrid carbon nanostructures. SiO2/TiN/LiNbO3 and SiO2/TiN/BaTiO3 samples were fabricated by pulsed laser deposition to study the piezoelectric effect. It is shown that the obtained nanocrystalline ferroelectric films exhibit a stable piezoelectric effect, which weakly depends on the nanoscale structure. An energy harvester architecture based on hybrid carbon nanostructures is developed. The use of the developed technology will improve the operational parameters of the converters, as well as replace toxic materials in their composition with lead-free ones, reducing the harmful anthropogenic impact on the nature. The obtained results can be used to create promising lead-free energy harvesters based on ferroelectric films for renewable energy and internet of things devices. 10.18721/JPM.153.249 539.234 renewable energy energy harvesting ferroelectric films pulsed laser deposition https://physmath.spbstu.ru/article/2022.59.49/

CNF RUS 274-279 Mozhayko Anna annaanna-1996@mail.ru Gerashchenkov Dmitry gda.spb@gmail.com Gerashchenkova Elena e.burkanova@gmail.com Davydov Vadim davydov_vadim66@mail.ru Laser surface treatment of aluminum: correlation between thermal modeling and experimental study In recent years, laser surface treatment was widely used to improve the properties of aluminum coatings. This paper implements a thermal model to simulate the laser treatment effects on a cold-sprayed aluminum coating and St3 substrate. As a result of the work, a model has been developed to evaluate the thermal fields and the melt pool during the laser surface treatment process, and laser treatment modes have been identified, with the help of which a high-alloyed aluminum layer on the surface of steel has been obtained. 10.18721/JPM.153.250 538.953 laser surface treatment aluminum intermetallides thermal fields thermal modeling https://physmath.spbstu.ru/article/2022.59.50/

CNF RUS 280-284 Federal State Budgetary Institution of Science K.A. Valiev Institute of Physics and Technology of the RAS Yaroslavl Branch Shlepakov Pavel p.shlepakov@bk.ru

Yaroslavl, Russian Federation

Uvarov Ilia i.v.uvarov@bk.ru Svetovoy Vitaliy svetovoy@yandex.ru Ruthenium as an electrode material for the fast electrochemical actuator Electrolysis of water performed by alternating polarity (AP) voltage pulses increases the operating frequency of the electrochemical actuator by several orders of magnitude due to the fast recombination of the produced gas. The gas is collected in nanobubbles that disappear quickly due to spontaneous combustion of hydrogen and oxygen. However, this type of electrolysis damages the electrodes and the actuator performance deteriorates with time. Platinum electrodes suffer from mechanical action of nanobubbles, while titanium structures are oxidized. A promising material is ruthenium due to its chemical inertness and mechanical strength. In this work, we test Ru, Pt and Ti electrodes in the AP electrolysis. The degree of wear, current flowing through the cell, and threshold voltage are analyzed and compared. 10.18721/JPM.153.251 53.097 alternating polarity electrolysis nanobubbles electrodes ruthenium degradation https://physmath.spbstu.ru/article/2022.59.51/

CNF RUS 285-290 Ostrovsky Mikhail ostrovsky3535@mail.ru Yakovleva Marina lina.invers@gmail.com Vasin Alexander a2vasin@yandex.ru Dontsov Aleksandr adontsovnick@yahoo.com Gulin Alexander aleksandr.gulin@phystech.edu Aybush Arseny aiboosh@gmail.com Feldman Tatiana feldmantb@mail.ru Physicochemical analysis of bisretinoid A2E photooxidative destruction products Bisretinoid N-retinyl-N-retinylidene ethanolamine (A2E) of the retinal pigment epithelium (RPE) lipofuscin granules is a side product of visual cycle. Its accumulation is associated with degenerative diseases of the retina and retinal pigment epithelium. In this study A2E photooxidation and photodegradation products were studied. Absorption and 2D fluorescence spectra of these substances were detected. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and Fourier-transform infrared spectroscopy (FTIR) revealed chemical changes during the A2E photooxidation process. Aldehyde accumulation was observed and new structure one of the resulting compounds was proposed. 10.18721/JPM.153.252 577.344 Retinal pigment epithelium bisretinoid A2E photooxidation carbonyls https://physmath.spbstu.ru/article/2022.59.52/

CNF RUS 291-295 Kharlamova Anastasya kharlamova.anastasya2015@yandex.ru 0000-0003-1999-1433 Makarov Dmitry d.makarov@narfu.ru Peculiarity of electron density calculation during interaction of ultrashort laser pulse with nitrogenous base of DNA molecule adenine Today, ultrashort laser pulses are used to study and analyze biomolecules. Their advantages over X-rays lie in the speed of measurement and accuracy, which allows studying the structure of a molecule on a time scale commensurate with the time of various biochemical processes in it. However, the practical possibility of studying chemical and biological processes in facilities using existing and promising X-ray free-electron lasers requires the development of a theory of the interaction of laser pulses with matter. In this article we will consider the interaction of an ultrashort laser pulse (USPs) with the base of the DNA (Deoxyribonucleic acid) molecule - adenine. In more detail we will consider the calculation of the photon birth probability, after the interaction of the pulse with the molecule. We will build a model of the base of the molecule and propose a method for calculating the electron density for the case when the substance has a different elemental composition. 10.18721/JPM.153.253 539.192 deoxyribonucleic acid ultrashort laser pulse photon electron density elemental composition https://physmath.spbstu.ru/article/2022.59.53/

CNF RUS 296-301 0000-0002-2083-4091 Serov Egor egorserov22021998@gmail.com Kavaler Alexey RepelLeha@yandex.ru Kruglov Vladislav vladislav.kruglov98@yandex.ru Reznik Vladislav vlreznik97@gmail.com Saraev Alexey alex.niispb@yandex.ru Davydov Vadim davydov_vadim66@mail.ru Development of a control algorithm for a fluid flow monitoring system in a microfluidic system Microfluidic systems are widely used in the preparation and analysis of liquid samples in biology, pharmacology and medicine. Each individual device using microfluidic systems differs in structure from others, and the accuracy of fluid control inside is an important factor. In this paper, we will consider the microfluidic system of a DNA analyzer. An algorithm that reads information from flow sensors in real time and transfers it to microcontroller STM32 has been developed for it. The received information was further processed, and on the basis of the received data, a conclusion was drawn about the correctness of the work performed by the device. The error handler, in case of deviation from the process, made the necessary adjustments by sending an error code to the necessary part of the device. 10.18721/JPM.153.254 53.082 microfluidic system control algorithm fluid control flow sensor DNA analysis https://physmath.spbstu.ru/article/2022.59.54/

CNF RUS 302-305 Tochilo Uliana yanulyana@gmail.com Osychenko Alina alina.chemphys@gmail.com Zalessky Aleksandr aleksandr.zalesskij@phystech.edu Martirosyan David petrosyan359@gmail.com Nadtochenko Victor nadtochenko@gmail.com Femtosecond laser is an effective instrument to remove DNA in pronuclei of mouse zygotes Applying femtosecond lasers in assisted reproductive technologies is very promising. The removing of a pronucleus (called epronucleation) in three-pronuclear zygotes may help to increase the number of normal diploid embryos. In this work we demonstrated the possibility of epronucleation in mouse zygotes by the femtosecond laser irradiation. We showed that the femtosecond laser could effectively destroy the pronuclei. At the same time, zygotes retained their viability and did not destroy. 10.18721/JPM.153.255 57.089.3 epronucleation zygote femtosecond laser nanosurgery non-invasive https://physmath.spbstu.ru/article/2022.59.55/

CNF RUS 306-310 Trifanova Ekaterina katikin@mail.ru Koshelev Alexander avkoshelev03@gmail.com Krylov Ivan ivan_krylov@bk.ru Khaydukov Kirill haidukov_11@mail.ru Popov Vladimir popov@laser.ru Photoluminescent α-NaYbF4:Er0.02Ce0.02Zn0.1 nanoparticles for bioimaging in visible and infrared ranges Nowadays noninvasive optical technologies require multifunctional nanomarkers, that can perform photoluminescence in different ranges of spectrum to provide broad possibilities for bioimaging. Photoluminescent nanoparticles doped with rare earth elements meet these requirements and are very promising for biological tissue visualization. α-NaYbF4:Er0.02Ce0.02Zn0.1 nanoparticles were characterized, had narrow and intensive photoluminescent peaks. Experiments were carried out on visualization in the visible and IR ranges of the spectrum. It was shown that a long photoluminescence lifetime made it possible to use the method of timegated luminescence imaging. Visualization experiments with phantoms of biotissue both 3.5% fat milk and distilled water showed that nanoparticles can be used for multipurpose bioimaging. 10.18721/JPM.153.256 535-15 photoluminescent nanoparticles bioimaging biotissue transparency windows time-gated luminescence imaging https://physmath.spbstu.ru/article/2022.59.56/

CNF RUS 311-316 Ostrovsky Mikhail ostrovsky3535@mail.ru Gulin Alexander aleksandr.gulin@phystech.edu Dontsov Aleksandr adontsovnick@yahoo.com Yakovleva Marina lina.invers@gmail.com Trofimova Natalia ntrofimova@mail.ru Aybush Arseny aiboosh@gmail.com Vasin Alexander a2vasin@yandex.ru Oxidative destruction of human RPE melanosomes induced by superoxide radicals leads to the formation of reactive aldehydes and ketones Oxidative destruction of the natural pigment melanin leads to a decrease in its concentration in the cell, a decrease of antioxidant properties and the accumulation of products that exhibit prooxidant activity. This work shows for the first time that oxidative destruction of melanosomes from human retinal pigment epithelium (RPE) cells induced by superoxide radicals results in the formation of toxic carbonyl compounds, namely aldehydes and ketones. Analysis of the products of oxidative degradation of melanosomes was performed by absorption and fluorescence spectroscopy and time-of-flight secondary ion mass spectrometry (ToF-SIMS). It has been shown the water-soluble products of oxidative destruction of RPE melanosomes induce proteins modification with the formation of fluorescent Schiff bases. It is assumed that carbonyl products of oxidative destruction of melanosomes can have a toxic effect on RPE cells, which is important for understanding the mechanisms of development of retina senile degenerative diseases. 10.18721/JPM.153.257 617.7 retinal pigment epithelium melanosomes superoxide carbonyl stress https://physmath.spbstu.ru/article/2022.59.57/

CNF RUS 317-320 Osychenko Alina alina.chemphys@gmail.com Zalessky Aleksandr aleksandr.zalesskij@phystech.edu Tochilo Uliana yanulyana@gmail.com Martirosyan David petrosyan359@gmail.com Oocyte enucleation by 795 nm femtosecond laser is a precise and effective method of recipient cytoplast preparation Oocyte enucleation by femtosecond (fs) laser radiation is low-invasive and effective method of recipient cytoplast preparation. We have already demonstrated an ability to completely eliminate the metaphase plate by the fs laser without significant oocyte morphology and viability impairment. Considering further development of femtosecond laser oocyte enucleation for artificial reproductive technologies in humans and for the somatic cell nuclear transfer in mammals, the persistence of any DNA fragments after the fs laser enucleation must be studied thoroughly. In this work we revealed the remains of the metaphase plate by super resolution confocal microscopy after the laser  enucleation of mouse oocytes at metaphase II stage. The laser was set up on 795 nm in 80 MHz mode with 0,5 nJ pulse energy. By the super resolution microscopy (Airyscan 2) we have detected minor fragments of the metaphase plate in the laser-exposed oocytes. However, the careful laser treatment is able to provide the recipient cytoplast without any detectable DNA fragments. 10.18721/JPM.153.258 57.089.38 recipient cytoplast femtosecond laser super resolution microscopy https://physmath.spbstu.ru/article/2022.59.58/

CNF RUS 321-325 Nikitina Anastasia anastasia.nikitina@metalab.ifmo.ru Nikolaeva Anna anna.nikolaeva@metalab.ifmo.ru ITMO University Petrov Mihail m.petrov@metalab.ifmo.ru

St. Petersburg, Russian Federation

Frizyuk Kristina k.frizyuk@metalab.ifmo.ru Nonlinear circular dichroism in dielectric nanoparticle dimers and trimers We performed the theoretical study of circular dichroism (CD) in the second harmonic (SH) signal generated in nanostructures of different symmetries. In particular, we explored nonlinear response of dielectric AlGaAs nanoparticles and showed that even in the case of symmetric achiral shape circular dichroism is possible only for some specific shapes and crystalline lattice orientations. Using the apparatus of group theory, we compared dimer and C3v symmetric trimer structures, and explained the appearance of SH-CD in dimer, as well as the absence of dichroism in AlGaAs trimers. In summary, we proved, that knowing the general symmetry of the nanostructure with crystalline lattice is not enough, and detailed analysis of the eigenmodes and nonlinear polarization symmetry is required. 10.18721/JPM.153.259 535-47 second harmonic generation nonlinear circular dichroism AlGaAs dielectric nanoparticle Mie resonance https://physmath.spbstu.ru/article/2022.59.59/

CNF RUS 326-330 Tikhomirov Vladimir greenbob54@gmail.com Chizhikov Sergey chigikov95@mail.ru Gudkov Alexander profgudkov@gmail.com Nikolaenkov Alexander vv11111@yandex.ru Gudkov Grigoriy ooo.giperion@gmail.com Optimization of heterostructure transistor parameters for the monolithic integrated circuits of the amplifying path of a medical radiothermograph The amplifying path of a modern miniature medical radiothermograph should provide a gain of about 80 dB with minimal intrinsic noise levels. The construction of such a path, even on the most modern element base, requires the use of several microcircuits with a significant resulting current consumption. The existing problem can be solved by creating new active elements of specialized monolithic microcircuits - low-noise transistors, for which the requirements of high energy efficiency will be taken into account when designing heterostructures. The paper presents the results of optimizing the design of a heterostructure low-noise transistor for use in microcircuits of the amplifying path of a miniature medical radiothermograph. 10.18721/JPM.153.260 621.382 medical radiothermography heterostructure transistor optimization amplifying path https://physmath.spbstu.ru/article/2022.59.60/

CNF RUS 331-335 Sidorov Evgeniy siea.18@uni-dubna.ru Kriger Vladlena vladlena.k576@mail.ru Nasirov Pavel CHemBioslne@gmail.com Novikova Sagila ibragimova21@yandex.ru Gribova Elena elena_g67@mail.ru Gladyshev Pavel pglad@yandex.ru Study of quantum dots conjugation with antibodies to be used in a lateral flow immunochromatographic assay Lateral-flow immunochromatographic assays (LFIA) is one of the most common low-cost, simple-to-use and rapid methods for point-of-care determining various types of bacterial, viral and autoimmune diseases. The selectivity and sensitivity of the analysis is determined by the complementarity interactions of protein molecules and attaching an analytical label to the protein. Recently, quantum dots (QDs) have been considered the most promising protein labels. In this study, oriented conjugation of QDs with antibodies (Abs) to glycoprotein B (gB) of the Aujeszky’s disease was conducted by the carbodiimide-succinimide method. There has been proposed a polymer coating of QDs suitable for site-specific conjugation based on the vinylpyrrolidone-maleic anhydride-ethylene glycol dimethacrylate (VP-MANEGDMA) copolymer. Using a portable fluorescent reader the minimum detection limits of the considered immunochromatographic test-systems with QDs as Abs labels were determined. 10.18721/JPM.153.261 543.9, 546.06, 57.083.3 bioconjugation immunochromatographic assay quantum dots antibodies https://physmath.spbstu.ru/article/2022.59.61/

CNF RUS 336-339 Kakovkina Yulia kakovkinaj@mail.ru Isokjanov Shakhboz isakjanov2997@gmail.com Lebedev Egor dr.beefheart@gmail.com Ryazanov Roman r.m.ryazanov@gmail.com Kitsyuk Evgeny Kitsyuk.e@gmail.com Features of the formation super C45-RuO2-based planar supercapacitor structures A method for forming electrodes of a planar supercapacitor based on Super C45 and RuO2 by electrophoretic deposition is considered. The possibility of controlling the sediment composition by changing the composition of the initial suspension is shown. The suspension was subjected to dispersion, after which electrophoresis was performed in an electrophoretic cell consisting of two electrodes and a power source. The features of electrophoretic deposition and the influence of the main technological regimes on the morphology and composition of the formed layers of electrode materials are considered. A technological route was developed for manufacturing prototypes of planar supercapacitors using laser engraving to apply a topological pattern. The dependence of the specific capacitance on the electric field strength during electrophoretic deposition has been studied. Thus, it became possible to create designs of planar supercapacitors for a wide range of applications in microelectronics. 10.18721/JPM.153.262 621.359.3 planar supercapacitor laser engraving electrophoretic deposition suspension electrode material https://physmath.spbstu.ru/article/2022.59.62/

CNF RUS 340-345 Ryzhova Daria qwdarya1234@gmail.com Davydov Vadim davydov_vadim66@mail.ru Monitoring of radioactive contamination in the atmosphere using radar systems The necessity of monitoring the state of the environment is justified. Various methods of environmental monitoring were analyzed. The radar method for monitoring radioactive contamination in the atmosphere was considered in detail. The monitoring data using radar stations were processed and analyzed. The efficiency of this method was estimated. Recommendations were proposed to expand the monitoring capabilities using radars to assess the environmental situation. 10.18721/JPM.153.263 623.6 radar systems radar station radioactive contamination environmental monitoring plasmoid atmosphere microwave radiation https://physmath.spbstu.ru/article/2022.59.63/

CNF RUS 346-351 Makeev Sergey st_makeev@mail.ru Method for constructing NMR signal spectra using the discrete Fourier transform The article deals with studies of the structure of the nuclear magnetic resonance signal, which is recorded using the modulation technique. The influence of the properties of the medium on the possibility of registering an NMR signal in a weak magnetic field using a modulation technique for measuring is established. A new method for describing the registered NMR signal using the modulation technique is proposed, taking into account the contributions of absorption and dispersion signals. The features of the use of spectral analysis in the study of the NMR signal from liquid media are determined. The results of theoretical calculation and experimental studies are compared. 10.18721/JPM.153.264 543.4 condensed medium nuclear magnetic resonance amplitude spectrum phase spectrum absorption signal dispersion signal https://physmath.spbstu.ru/article/2022.59.64/

CNF RUS 352-357 Astafiev Oleg O.Astafiev@skoltech.ru Dorogov Aleksandr Dorogov.AE@phystech.edu Fedorov Gleb gleb.fedorov@phystech.edu Kalacheva Daria d.kalacheva@gmail.com Dmitriev Aleksei dmitrmipt@gmail.com Bolgar Aleksey alexgood@list.ru Abramov Nikolay abramov.nn@misis.ru Application of a broadband Josephson parametric amplifier We examine the performance of a Josephson Parametric Amplifier (JPA) which uses an array of SNAILs (Superconducting Nonlinear Asymmetric Inductive eLements) as the source of nonlinearity and leverages the technique of impedance engineering (introducing a positive linear slope in the imaginary part of the input impedance seen by the SNAILs) to overcome a traditional gain-bandwidth product and increase the 1-dB compression point. We experimentally demonstrate an 18 dB gain over a 586 MHz band, along with a 1-dB compression point -101.9 dBm. All these characteristics are of great importance for the quantum devices measurements and in particular for the single-shot readout of a multi-qubit system. The signal-to-noise ratio after the application of the JPA was increased by 3 times. That led to the improvement of separation fidelity of single-shot dispersive measurements of a transmon qubit from 30.6% to 97.2%. 10.18721/JPM.153.265 53.084.6 parametric amplifier Josephson junction gain-bandwidth product 1-dB compression point single-shot readout https://physmath.spbstu.ru/article/2022.59.65/

CNF RUS 358-363 Gureeva Irena irena-gureeva@mail.ru Davydov Vadim davydov_vadim66@mail.ru New technique for researching the absorption signal fronts of laser radiation on blood vessels The analysis of pulse oximetry as a method of rapid diagnosis of the state of the body in real time was performed. Data are presented that the high rate of pulse wave propagation through the arteries in patients with COVID-19 may indicate a high risk of death. It is noted that modern device designs and pulse wave signal processing methods have a number of disadvantages. This leads to an unreliable interpretation of the data. Using a charge-coupled device increases the accuracy of measuring the position of maxima and minima on the time scale. This makes it possible to determine the moment of closure of the aortic valves of the left ventricle more accurately. The registered pulse waves of various people are presented, as well as the results of the study of the time intervals of the rising and falling fronts. 10.18721/JPM.153.266 612.166 blood flow pulse wave laser radiation absorption signal oxygen time rise and fall front measurement error https://physmath.spbstu.ru/article/2022.59.66/

CNF RUS 364-369 Shavshin Artyom shavshin2107@gmail.com Davydov Vadim davydov_vadim66@mail.ru Development of automatic gain control for atomic frequency standard on rubidium-87 atoms The necessity of upgrading the optical path of the atomic frequency standard based on rubidium-87 atoms is substantiated. A new scheme for automatic gain control in the optical path of an atomic frequency standard based on rubidium-87 atoms is presented. The amplifier of the error signal formed on the photodetector for controlling the microwave signal is considered in detail. Experimental studies of the metrological characteristics of an atomic frequency standard based on rubidium-87 atoms with automatic gain control are presented. The validity of the developed automatic amplification scheme for the new frequency standard based on rubidium-87 atoms is confirmed. 10.18721/JPM.153.267 53.06 time scale stabilization automatic frequency control rubidium frequency standard gain control operational amplifier Allan dispersion https://physmath.spbstu.ru/article/2022.59.67/

CNF RUS 370-374 Seliverstov Sergey seliverstovsv@mail.ru Svyatodukh Sergey sergey.svetodux@gmail.com Prokhodtsov Aleksey alexabrest@yandex.ru Goltsman Grigory goltsman@rplab.ru Simulation of terahertz photonic integrated antenna The rapid development of wireless devices, that take place over the last decade, is associated with an increase in the need to achieve a higher data transfer rate. To achieve this goal, it is necessary to use the terahertz (THz) range. The vast majority of THz devices (no matter bulk or integrated) require fast, non-mechanical beam shape control, which is generally defined as the ability to manipulate the shape of the radiation pattern in the desired way. But it is hard to implement without the use of photonic integrated phased array antennas. In this paper, the possibility of the creation of photonic integrated antenna which is a basic element of such a system is investigated and confirmed. The antenna is based on a platform of metamaterial silicon with perforations, the dimensions of which are in the deep subwavelength region, which makes it possible to provide a wide bandwidth with low dispersion. 10.18721/JPM.153.268 537.876 Phased array antennas THz range photonic integrated circuits coupling devices metamaterials https://physmath.spbstu.ru/article/2022.59.68/

CNF RUS 375-380 Klimenko Daria dasha.klimenko.01@inbox.ru Esikova Nadezhda elpis-san@yandex.ru 0000-0002-9235-8549 Institute for Analytical Instrumentation, RAS Bulyanitsa Anton antbulyan@yandex.ru Davydov Roman davydovroman@outlook.com Belov Dmitrii belov.da@list.ru Processing of qPCR signals obtained on microfluidic chips in the measurement sequence disorder event The formation and movement of gas bubbles in microfluidic chips leads to the measurement sequence disorder in the form of a signal distortion. Two new methods for automatic processing of distorted qPCR signals were developed and implemented. Methods are based on the qPCR signals approximation by a sigmoid function and make it possible to successfully perform a microfluidic chips qPCR analysis in the event of bubbles, which is demonstrated on experimental and simulation curves. 10.18721/JPM.153.269 57.087.1 microfluidics microfluidic chip qPCR bubbles approximation https://physmath.spbstu.ru/article/2022.59.69/

CNF RUS 381-387 Gryaznova Ekaterina katya.gryaznova@mail.ru Davydov Vadim davydov_vadim66@mail.ru Malanin Kirill kymalanin@gmail.com Application of a fiber-optic communication line for transmitting RF-signal in system for measuring parameters of active phased antenna arrays The necessity of using fiber-optic communication lines (FOCL) for transmitting microwave signals in radar complexes is substantiated. The advantages of the use of FOCL when working with microwave signals and testing various antennas are noted. A system with a fiber optic system has been developed to measure the parameters of an active phased array antenna (APAA) in the far zone. The choice of the components of the system is justified and their characteristics are measured. The results of research on the operation of the developed system are presented. 10.18721/JPM.153.270 681.7 fiber-optic communication line active phased array antenna radiophotonics frequency range microwave signal far zone https://physmath.spbstu.ru/article/2022.59.70/

CNF RUS 388-392 Burtsev Vladimir burtsev.vd@phystech.edu Rogozhkin Kirill rogozhkinkirill@gmail.com Vosheva Tatyana Vosheva.ts@mipt.ru Khudykin Anton khudykin.aa@mipt.ru Filonov Dmitry dimfilonov@gmail.com Additive manufacturing of an antenna array Antenna arrays are essential elements in modern wireless communication technologies. Capabilities to perform real-time beamforming with millisecond-scale latencies enable supporting frontier 5G communication protocols. Being based on standard lithography methods, printed board antenna arrays are two-dimensional by design. However, exploration of the third dimension allows for obtaining new capabilities, including wide-angle scanning, broadband impedance matching, higher directivity, and several others. Here we demonstrate an additively manufactured volumetric antenna array, where each individual element is 3D-printed and subsequently metalized with the aid of electrochemical deposition. Additive manufacturing is foreseen to provide capabilities of a complete production cycle, including electronics and peripheries, being fabricated within the same machine. Here, the full potential of  volumetric antenna arrays will be revealed. 10.18721/JPM.153.271 537.86 additive manufacturing antennae 3D print radio frequency telecommunications electrodynamics antenna arrays https://physmath.spbstu.ru/article/2022.59.71/

CNF RUS 393-398 Bulatov Nikita separatast@gmail.com Vosheva Tatyana Vosheva.ts@mipt.ru Khudykin Anton khudykin.aa@mipt.ru Filonov Dmitry dimfilonov@gmail.com RFID-based sensor for insect detection Real-time monitoring of insects is an important objective across many life-science disciplines. Here we demonstrate the first of its kind disposable wireless detector, capable of monitoring insect activity. Our solution is based on an  indirect indicator, based on sugar consumption by insects. We develop a caramel-based antenna device, linked with an RFID chip. Apart from its nutrition value, caramel is a dielectric material, affecting electromagnetic interactions between waves and matter. Being consumed by insects, changes the electromagnetic properties of the antenna, deactivating the tag. The failure in the readout suggests an active presence of insects in the surrounding. Adding control bits, weather sustainability, and other functions, required for a reliable outdoor operation, will be reported in the future. 10.18721/JPM.153.272 537.86 RFID insect detection microwave sensor agricultural monitoring https://physmath.spbstu.ru/article/2022.59.72/

CNF RUS 399-405 Myazin Nikita myazin.n@list.ru Davydov Vadim davydov_vadim66@mail.ru Design improvements of nuclear magnetic resonance magnetometer to study magnetic mid-fields variations The necessity to develop a magnetometer for variations research in the midfields magnetic strength with a relative error of 10–6 is justified. A modernization design of magnetometer to nuclear magnetic resonance with using to maser with flowing liquid is presented. The block diagram of nuclear magnetic resonance magnetometer is given. The core principle of its working is described. The results of experimental investigations of various variations to magnetic fields are presented. Further directions of modernization of the design of the magnetometer are determined. 10.18721/JPM.153.273 53.089 nuclear magnetic resonance magnetic field magnetometer magnetic field variations maser https://physmath.spbstu.ru/article/2022.59.73/

CNF RUS 406-411 0000-0002-3698-6700 Peter the Great St. Petersburg Polytechnic University Wang Ding jssdwang06@mail.ru

St. Petersburg, Russian Federation

Davydov Vadim davydov_vadim66@mail.ru Possibility of using atomic clocks on mercury-199 ions in satellite navigation systems The necessity of developing atomic clocks with high long-term stability for space exploration and improving the operation of satellite systems is substantiated. The photon detection system for the design of atomic clocks on  mercury-199 ions for space applications is developed. A comparison is made of various data on the Allan deviation for various models of atomic clocks based on mercury-199 ions. For comparison, we used the results obtained by us and other scientists. The directions for further research are determined. 10.18721/JPM.153.274 6 satellite navigation system atomic clock atomic clock on mercury-199 ions Paul ion trap Allan deviation https://physmath.spbstu.ru/article/2022.59.74/

CNF RUS 412-418 Isupova Ekaterina isupova.e24@mail.ru Budnikov Andrey budnikov.as@edu.spbstu.ru Shvetsov Sergey shvetsov0000@gmail.com Davydov Vadim davydov_vadim66@mail.ru Improvement of the characteristics of the frequency synthesizer in the quantum frequency standard on caesium-133 atoms A new circuit of a frequency synthesizer is presented, which is an important functional node in the quantum frequency standard on cesium atoms. The advantages and disadvantages of the new signal synthesis method are  considered in detail. By increasing the bit depth of the accumulating adder, it was possible to reduce the step of tuning the output frequency by several orders of magnitude. This method meets all the requirements for the parameters of frequency synthesizers. 10.18721/JPM.153.275 53.043 quantum frequency standard frequency synthesizer direct digital synthesis accumulating adder frequency tuning cesium atomic clocks https://physmath.spbstu.ru/article/2022.59.75/