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6th International Conference on Metamaterials and Nanophotonics, METANANO 2021

作者： Cherepakhin, A. Zhizhchenko, A. Porfirev, A. Pushkarev, A. Makarov, S. Kuchmizhak, A. Institute of Automation and Control Processes Far Eastern Branch of RAS Vladivostok690061 Russia Far Eastern Federal University Vladivostok690061 Russia Image Processing Systems Institute of the RAS-Branch of FSRC "Crystallography and Photonics" of the RAS Samara443001 Russia ITMO University St. Petersburg197101 Russia

Using direct femtosecond-laser projection lithography in chemically synthesized CsPbBr3 perovskite microcrystals we demonstrate high-throughput fabrication of advanced binary microscale optical elements for nanofocusing as well as generation of high-order optical vortex beams. The obtained results highlight the CsPbBr3 microcrystals as a promising material for realization of various complicated 2D micro-optical elements and holograms that can be directly imprinted using non-destructive and practically relevant laser technologies. © 2021 institute of Physics Publishing. All rights reserved.

关键词： Femtosecond lasers

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Transport properties of casi2 and ca2si thin films 5th

Transport properties of casi2 and ca2si thin films

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5th Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2020

作者： Dermenji, L. Lisunov, K.G. Galkin, K.N. Goroshko, D.L. Chusovitin, E.A. Galkin, N.G. Arushanov, E. Institute of Applied Physics ASM Academiei Str. 5 ChisinauMD-2028 Moldova Institute of Automation and Control Processes of FEB RAS Radio Str. 5 Vladivostok690041 Russia

ISBN: (纸本)9783035737936

Resistivity, ρ (T), and Hall coefficient in weak (B −1 plots at lower and higher T, and a weak increase between T ~ 200 − 300 K. Both materials demonstrate a complex dependence of R (T), including a change of the sign. Transport properties above have been analyzed assuming two groups of charge carriers, electrons and holes, contributing them. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Silicides

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Crystallization of optically thick amorphous silicon films by near-ir femtosecond laser processing 5th

Crystallization of optically thick amorphous silicon films b...

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5th Asian School-Conference on Physics and Technology of Nanostructured Materials, ASCO-Nanomat 2020

作者： Mitsai, Eugeny Dostovalov, Alexander Bronnikov, Kirill Nepomniaschiy, Alexander Zhizhchenko, Alexey Kuchmizhak, Aleksandr Institute of Automation and Control Processes FEB RAS 5 Radio St Vladivostok690041 Russia Institute of Chemistry FEB RAS 159 Pr-t. 100-letiya Vladivostoka Vladivostok690022 Russia Institute of Automation and Electrometry of the SB RAS 1 Acad. Koptyug Ave Novosibirsk630090 Russia Novosibirsk State University 2 Pirogova St. Novosibirsk630090 Russia

ISBN: (纸本)9783035737936

We demonstrated efficient crystallization of amorphous Si films induced by their direct irradiation with near-IR femtosecond laser pulses coming at sub-MHz repetition rate. Comprehensive analysis of morphology and composition of the laser-annealed film by atomic-force microscopy, Fourier-transform IR, Raman and energy dispersive X-ray spectroscopy as well as numerical modeling of optical spectra confirmed efficient crystallization of amorphous Si and high-quality of the obtained films opening pathway for applications in thin-film solar cells, transistors and displays. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Amorphous silicon

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Femtosecond laser processing of silicon in liquid: diverse nanomorphologies and applications 7

Femtosecond laser processing of silicon in liquid: diverse n...

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Advanced Laser Processing and Manufacturing VII 2023

作者： Borodaenko, Yulia M. Gurbatov, Stanislav O. Khonina, Svetlana N. Gurevich, Evgeny E. Kuchmizhak, Aleksandr A. Institute of Automation and Control Processes Far Eastern Branch Russian Academy of Science 5 Radio St. Vladivostok690041 Russia Far Eastern Federal University 10 Ajax Bay Russky Island Vladivostok690922 Russia Image Processing Systems Institute of RAS Branch of the FSRC "Crystallography and Photonics" RAS 151 Molodogvardeyskaya St. Samara443001 Russia University of Applied Sciences Munster 39 StegerwaldstraΒe St. Steinfurt48565 Germany Quantum Center Far Eastern Federal University 10 Ajax Bay Russky Island Vladivostok690922 Russia

ISBN: (纸本)9781510667730

In this work, the effects of direct femtosecond laser nanostructuring on monocrystalline silicon (Si) wafer immersed in liquid environment were studied. Ultrashort laser exposure induced nonequilibrium states in materials triggers the morphology self- organization driven by excited electromagnetic and hydrodynamic processes, which ultimately give rise to the formation of regular nanogratings with different periodicity (Λ1=250-300 nm, Λ2=70±10 nm) and randomly arranged spike structures. The type of the nanotextures can be controlled by varying the laser fluence and polarization distribution of the incident laser beam studied for the cases of linearly/circularly polarized Gaussian laser beams as well as azimuthally polarized cylindrical vector beam. Through laser-induced interface chemical reactions stimulated by adding the appropriate salt/acid/molecular precursors in the process of liquid-phase Si texturing, it becomes possible to functionalize the obtained nanotextures with mono- and multi-metallic nanoparticels and/or photoluminescent chemosensing molecular probes. Adjusting laser processing parameters and component functionalizing solutions has providing a flexible approach for large-scale manufacturing that can be realized for diverse applications such as light harvesting, chemosensing, optical detection, heterogeneous catalysis and microfluidics. © 2023 SPIE.

关键词： Laser beams

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On improved model of solid porous fuel gasification in low-temperature gas generator for flying vehicle

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AIP Conference Proceedings 2023年第1期2504卷

作者： Nickolay A. Lutsenko 1Institute of Automation and Control Processes FEB RAS Vladivostok Russia 2Far Eastern Federal University Vladivostok Russia

An improved mathematical model of solid porous fuel gasification in a combined charge of a low-temperature gas generator has been developed. For taking into account the change in the molar mass of the gas, a differential equation has been added to the model for determining the density of the gas that arising from solid fuel as a result of the gasification process. This allows one to determine the amount of gasification products and to accurately calculate the molar mass of the gas mixture at each point of the gas generator at each time. Calculations carried out using the refined model have shown that taking into account the change in molar mass of the gas can lead to significant changes in some of the unknown functions, such as the gas velocity and density. At the same time, the velocity of the gasification wave propagation changes very insignificantly. Thus, taking into account the change in molar mass of the gas has little effect on the estimation of the maximum operating time of the propulsion system.

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Investigation of the Parallelization Performance of the Computational Algorithm for Calculating the Time-Dependent Axisymmetric Gas Flows through Porous Objects with Heterogeneous Combustion Sources

Investigation of the Parallelization Performance of the Comp...

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International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)

作者： K.G. Borovik D.V. Leontev D.I. Kharitonov Far Eastern Federal University (FEFU) Institute of Automation and Control Processes Far Eastern Branch of RAS (IACP FEB RAS) Vladivostok Russia Institute of Automation and Control Processes Far Eastern Branch of RAS (IACP FEB RAS) Vladivostok Russia

ISBN: (数字)9781728169514

ISBN: (纸本)9781728169521

In the present paper the numerical approach for simulating the filtration combustion of axisymmetric porous object is considered. The combustion of porous media is widely used in various natural or technological processes. The proposed numerical method is based on the combination of explicit and implicit finite-difference schemes. The parallelization performance study was carried out for various grid steps. It is shown that parallelization is effective for fine grids, but on coarse grids the use of the parallel algorithm does not lead to a significant acceleration of computations. For different grids, the number of threads is determined, the use of which leads to the maximum speedup of the parallel program. The proposed parallelization makes it possible to speed up the calculation when modeling filtration combustion of various porous media, including metal-containing ones.

关键词： Combustion Mathematical model Solids Filtration Media Fluid flow Instruction sets

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Calculation of Resonant Frequencies of Silicon AFM Cantilevers 8

Calculation of Resonant Frequencies of Silicon AFM Cantileve...

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8th International Youth Scientific School-Conference on Modern Problems of Physics and Technology, MPPT 2019

作者： Efimov, T.A. rassolov, E.A. Andryukov, B.G. Zaporozhets, T.S. Romashko, R.V. Optoelectronics Department Institute of Automation and Control Processes Feb Ras Radio street 5 Vladivostok690041 Russia Far-Eastern Federal University Sukhanova street 8 Vladivostok690950 Russia G.P. Somov Research Institute of Epidemiology and Microbiology Feb Ras Selskya street 1 Vladivostok690087 Russia

A theoretical study of the quality and the validity range of different numerical and analytical methods of calculating of the frequency shift in measurement using microcromechanical sensor is presented. This work considered a calculating method for natural frequency in comparison with experimentally measured oscillation frequencies of microcromechanical sensor immersed in air and/or viscous medium. The numerical methods for solving the equation of resonance oscillation of the console fixed on one side are considered for calculating the natural oscillation frequencies of standard AFM cantilevers. © Published under licence by IOP Publishing Ltd.

关键词： Natural frequencies

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Sensor Fault Identification in Nonlinear Dynamic Systems ⁎

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IFAC-PapersOnLine 2020年第2期53卷 750-755页

作者： Alexey Zhirabok Alexander Zuev Alexey Shumsky Far Eastern Federal University Vladivostok 690950 Russia Institute of Marine Technology Problems FEB RAS Vladivostok 690950 Russia Institute Automation and Control Processes FEB RAS Vladivostok 690041 Russia

The problem of sensor fault identification in engineering systems described by nonlinear dynamic models is considered. To solve the problem, sliding mode observers are used. The feature of the suggested solution is using the reduced order model of the initial system to design sliding mode observer. This allows to obtain sliding mode observer of reduced dimension and extend a class of systems for which sliding mode observer can be constructed.

关键词： Nonlinear dynamic systems faults identification sliding mode observers reduced order models

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A New Look at Calcium Digermanide CaGe 2 : A High-Performing Semimetal Transparent Conducting Material for Ge Optoelectronics

arXiv

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arXiv 2023年

作者： Ilyaschenko, V.M. Pavlov, D.V. Balagan, S.A. Gerasimenko, A.V. Tarasenko, N.V. Kuchmizhak, Aleksandr A. Shevlyagin, Aleksandr V. Institute of Automation and Control Processes Far Eastern Branch Russian Academy of Science 5 Radio Str. Vladivostok690041 Russia Institute of Chemistry FEB RAS Vladivostok690022 Russia B.I. Stepanov Institute of Physics National Academy of Sciences of Belarus Minsk220072 Belarus Pacific Quantum Center Far Eastern Federal University Vladivostok Russia Institute of Chemistry Saint Petersburg State University Saint Petersburg198504 Russia

Following a recently manifested guide of how to team up infrared transparency and high electrical conductivity within semimetal materials [C. Cui et al. Prog. Mater. Sci. 2023, 136, 101112], we evaluate an applicability of the calcium digermanide (CaGe 2) thin film electrodes for the advanced Ge-based optical devices. Rigorous growth experiments were conducted to define the optimal annealing treatment and thickness of the Ca-Ge mixture for producing stable CaGe 2 layers with high figure of merit (FOM) as transparent conducting material. Ab-initio electronic band structure calculations and optical modeling confirmed CaGe 2 semimetal nature, which is responsible for a demonstrated high FOM. To test CaGe 2 electrodes under actual conditions, a planar Ge photodetector (PD) with metal-semiconductor-metal structure was fabricated, where CaGe 2 /Ge interface acts as Schottky barrier. The resulting Ge PD with semimetal electrodes outperformed commercially available Ge devices in terms of both photoresponse magnitude and operated spectral range. Moreover, by using femtosecond-laser projection lithography, a mesh CaGe 2 electrode with the relative broadband transmittance of 90% and sheet resistance of 20 Ω /sq. was demonstrated, which further enhanced Ge PD photoresponse. Thus, obtained results suggest that CaGe 2 thin films have a great potential in numerous applications promoting the era of advanced Ge optoelectronics. © 2023, CC BY.

关键词： Germanium alloys

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Thickness-dependent electronic band structure in MBE-grown hexagonal InTe films

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Physical Review B 2022年第16期106卷 165301-165301页

作者： A. V. Matetskiy V. V. Mararov A. N. Mihalyuk N. V. Denisov S. V. Eremeev A. V. Zotov A. A. Saranin Institute of Automation and Control Processes Far Eastern Branch of the RAS Vladivostok 690041 Russian Federation Istituto di Struttura della Materia Consiglio Nazionale delle Ricerche Trieste I-34149 Italy Institute of High Technologies and Advanced Materials Far Eastern Federal University 690950 Vladivostok Russia Institute of Strength Physics and Materials Science SB RAS 634021 Tomsk Russia

Films of the hexagonal InTe with thicknesses from one to three tetralayers (TLs) were synthesized on the bilayer graphene/SiC by molecular beam epitaxy. Valence bands of the one- and two-TL-thick films were found to be flat-like near Γ¯ point, but become parabolic for the three-TL-thick film and beyond. The band gap of the InTe was found to be equal to 2.1 eV for the single tetralayer and tends to reduce its size with thickness. The band structure calculations revealed a large spin splitting of the InTe single tetralayer lower conduction band with exclusive out-of-plane spin polarization. Bearing in mind inaccessibility of the hexagonal InTe in a bulk form, all above-mentioned findings open up a way for the further study of this perspective material.

关键词： Electronic structure Spin-orbit coupling Layered semiconductors Angle-resolved photoemission spectroscopy Band structure methods Density functional calculations Molecular beam epitaxy Scanning tunneling microscopy

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