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Rasskazov, I. L.
Waveguiding properties of short linear chains of nonspherical metal nanoparticles [Текст] / I. L. Rasskazov, S. V. Karpov, V. A. Markel // J. Opt. Soc. Am. B. - 2014. - Vol. 31, Is. 12. - P. 2981-2989, DOI 10.1364/JOSAB.31.002981. - Cited References: 39. - This research was supported in part by the U.S. National Science Foundation under Grant DMS1216970; by the Russian Academy of Sciences under Grants 24.29, 24.31, III.9.5, 43, and SFU (101); and by the Russian Ministry of Education and Science under Contract 1792. . - ISSN 0740-3224. - ISSN 1520-8540

РУБ Optics
Рубрики:
DISPERSION-RELATIONS
   MODES
   SCATTERING
   ARRAYS
   GUIDES
   LIGHT
   GAIN
Аннотация: We study numerically the discrete dispersion relations and waveguiding properties of relatively short linear chains of spherical and spheroidal silver nanoparticles. Simulations are based on the Drude model for the dielectric permittivity of metal and on the dipole approximation for the electromagnetic interaction of particles. We also simulate the dynamics of femtosecond optical pulse propagation along such chains. In the case that we consider (10 particles per chain), reflections from the chain terminals play a significant detrimental role. We show that dissipative traps can be used to reduce the effects of reflections. We also show that chains composed of oblate spheroids with sufficiently small aspect ratio (nanodisks) have better waveguiding properties when compared to chains made of particles with other spheroidal shapes. This includes a slower rate of decay, larger group velocity, and larger bandwidth.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660041, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Univ Penn, Dept Radiol, Philadelphia, PA 19104 USA
Univ Penn, Dept Bioengn, Philadelphia, PA 19104 USA
Univ Penn, Grad Grp Appl Math & Computat Sci, Philadelphia, PA 19104 USA

Доп.точки доступа:
Karpov, S. V.; Карпов, Сергей Васильевич; Markel, V. A.; Рассказов, Илья Леонидович; U.S. National Science Foundation [DMS1216970]; Russian Academy of Sciences [24.29, 24.31, III.9.5, 43]; SFU [101]; Russian Ministry of Education and Science [1792]
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Arkhipkin, V. G.
Transmission and reflection spectra of a photonic crystal with a Raman defects / V. G. Arkhipkin, S. A. Myslivets // J. Exp. Theor. Phys. - 2011. - Vol. 111, Is. 6. - P. 898-906, DOI 10.1134/S1063776110120022. - Cited References: 37. - This work was supported by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. NSh-7810.2010.3), the Presidium of the Russian Academy of Sciences (project no. 27.1), the Ministry of Education and Science of the Russian Federation (state contract no. 02.740.11.0220), and the Siberian Branch, Russian Academy of Sciences (integration project no. 5). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
   SLOW-LIGHT
   NONLINEAR OPTICS
   MICROCAVITIES
   LASERS
   AMPLIFIER
   MODES
Кл.слова (ненормированные):
Group velocities -- High frequency HF -- Microwatts -- Nonlinear refractive index -- One dimensional photonic crystal -- Probe field -- Pump intensities -- Raman gain -- Raman resonances -- Reflection spectra -- Spectral position -- Three level atoms -- Transmission spectrums -- Defects -- Dispersion (waves) -- Probes -- Pumping (laser) -- Pumps -- Refractive index -- Resonance -- Photonic crystals
Аннотация: Features of Raman gain of probe radiation in three-level atoms placed in a defect of a one-dimensional photonic crystal in the presence of laser radiation (pump) at an adjacent high-frequency transition have been theoretically investigated. It has been shown that there is a pump intensity range where narrow peaks (resonances) simultaneously appear in the transmission and reflection spectra of the probe field. Beyond this region, the peak in the transmission spectrum is transformed to a narrow dip. The spectral position of these peaks is determined by the Raman resonance and the transmittance and reflectance can be larger than unity at pump intensities from several microwatts per square centimeter to several tens of milliwatts per square centimeter. The nature of narrow peaks is due to a sharp dispersion of a nonlinear refractive index near the Raman resonance; this dispersion is responsible for a strong decrease in the group velocity of probe radiation. The proposed scheme makes it possible to obtain controlled ultranarrow resonances in the transmission and reflection spectra of the photonic crystal.

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Оригинал на русском языке Спектры пропускания и отражения фотонного кристалла с рамановским дефектом [Текст] / В. Г. Архипкин, С. А. Мысливец // Журнал экспериментальной и теоретической физики. - Москва : Федеральное государственное унитарное предприятие "Академический научно-издательский, производственно-полиграфический и книгораспространительский центр Российской академии наук "Издательство "Наука", 2010. - Т. 138 № 6. - С. 1018-1027

Держатели документа:
[Arkhipkin, V. G.] Russian Acad Sci, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
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    Study of Peculiarities of the Microwave Absorption Spectrum of Nanocrystalline Thin Magnetic Films / B. A. Belyaev [et al.] // Russ. Phys. J. - 2019. - Vol. 61, Is. 10. - P. 1798-1805, DOI 10.1007/s11182-019-01603-4. - Cited References: 22. - This work was supported by the Ministry of Education and Science of the Russian Federation, project No. RFMEFI60417X0179. . - ISSN 1064-8887. - ISSN 1573-9228
Рубрики:
MICROMAGNETIC CALCULATION
   SIMULATIONS
   PARTICLES
   MODES
Кл.слова (ненормированные):
micromagnetic modeling -- nanocrystallites -- random magnetic anisotropy -- ferromagnetic resonance -- microwave
Аннотация: Based on the micromagnetic model which takes into account the random distribution of the uniaxial magnetic anisotropy directions in crystallites of a nanocrystalline film, an effective method has been implemented for calculation of the magnetization dynamics in microwave fields. For a certain range of crystallite sizes, when the energy of the random magnetic anisotropy is comparable to the exchange energy, a significant change of the ferromagnetic resonance field, broadening of the resonance line, and the appearance of an asymmetry in the shape of the resonance curve were found. With an increase of the crystallite sizes, the resonance field first grows, then, it quickly decreases to its minimum, and then, it grows again to reach saturation. In this case, the steepness of the left slope of the broadening resonance curve first decreases faster than that of the right slope, leading to the symmetry breaking of the resonance curve shape, then, the curve becomes symmetrical again, and then, the steepness of the left slope becomes greater than that of the right slope.

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Публикация на русском языке Исследование особенностей спектра СВЧ-поглощения нанокристаллических тонких магнитных пленок [Текст] / Б. А. Беляев [и др.] // Изв. вузов. Физика. - 2018. - Т. 61 № 10. - С. 50-56

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Соловьев, Платон Николаевич; Ministry of Education and Science of the Russian Federation [RFMEFI60417X0179]
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Spin-Wave Resonance in One-Dimensional Magnonic Crystals by an Example of Multilayer Co-P Films / R. S. Iskhakov, S. V. Stolyar, L. A. Chekanova, I. G. Vazhenina // Phys. Solid State. - 2020. - Vol. 62, Is. 10. - P. 1861-1867, DOI 10.1134/S1063783420100121. - Cited References: 47 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
FERROMAGNETIC-RESONANCE
   SPECTRUM
   MODES
   INHOMOGENEITIES
Кл.слова (ненормированные):
spin-wave resonance -- surface-anisotropy constant -- exchange-interaction constant -- amorphous and nanocrystalline alloys
Аннотация: Layered magnetic films of Co–P alloy, which are sets of laminates with certain atomic and chemical structures, have been investigated by spin-wave resonance. Coatings of two types were synthesized: a magnonic crystal (amorphous Co(P)/fcc Co(P))N and gradient Co(P) films. They exhibit two different modifications of the spin-wave resonance (SWR) spectrum. In the first case, the SWR spectrum is described as Hn(n) ~ n2 with a modification caused by the formation of the first stop band of the magnonic crystal. In the second case, the dependence of resonance fields Hn of the spin-wave modes on mode number n has the form of Hn(n) ~ n2/3. Thermal annealing leads to crystallization (amorphous alloy → fcc) and causes transformation of the layered films to the films of single-phase Co–P alloys, which is accompanied by a change in the shapes of the SWR spectra and occurrence of a “exchange kink” spectral modification.

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Публикация на русском языке Спин-волновой резонанс в одномерных магнонных кристаллах, на примере мультислойных пленок Co-P [Текст] / Р. С. Исхаков, С. В. Столяр, Л. А. Чеканова, И. Г. Важенина // Физ. тверд. тела. - 2020. - Т. 62 Вып. 10. - С. 1658-1664

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Stolyar, S. V.; Chekanova, L. A.; Чеканова, Лидия Александровна; Vazhenina, I. G.; Важенина, Ирина Георгиевна
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Ignatchenko, V. A.
Spin-wave resonance in gradient ferromagnets with concave and convex variations of magnetic parameters / V. A. Ignatchenko, D. S. Tsikalov // J. Appl. Phys. - 2020. - Vol. 127, Is. 12. - Ст. 123903, DOI 10.1063/1.5143499. - Cited References: 26. - This work was partially supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project (No. 18-42-243005) "Synthesis and investigation of magnetic properties of gradient materials that are characterized by predetermined type of the magnetic parameter change" and the Krasnoyarsk Regional Fund of Science in the framework of participation in the conference "VII Euro-Asian Symposium 'Trends in MAGnetism' (EASTMAG 2019)." . - ISSN 0021-8979. - ISSN 1089-7550

РУБ Physics, Applied
Рубрики:
SPECTRA
MODES
Аннотация: The theory of spin-wave resonance in gradient ferromagnetic films with magnetic parameters varying in space described by both concave and convex quadratic functions is developed. Gradient structures such as a potential well, a potential barrier, and a monotonic change in potential between the film surfaces for both quadratic functions are considered. The waveforms of oscillations mn(z), the laws of the dependence of discrete frequencies ωn, and relative susceptibilities χn/χ01 of spin-wave resonances on the resonance number n are studied. It is shown that the law ωn∝n for nnc, where nc is the resonance level near the upper edge of the gradient inhomogeneity, which is well known for a parabolic potential well, is also valid for the potential barrier and for the monotonic change in potential, if these structures are formed by a concave quadratic function. It is shown that the law ωn∝(n−1/2)1/2, which we numerically derived and approximated by the analytical formula, is valid for all three structures formed by a convex quadratic function. It is shown that the magnetic susceptibility χn of spin-wave resonances for nnc is much greater than the susceptibility of resonances in a uniform film. An experimental study of both laws ωn(n) and χn(n) would allow one to determine the type of quadratic function that formed the gradient structure and the form of this structure. The possibility of creating gradient films with different laws ωn(n) and the high magnitude of the high-frequency magnetic susceptibility χn(n) at nnc make these metamaterials promising for practical applications.

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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory [18-42-243005]
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Vetrov, S. Ya.
Spectral and polarization properties of a ‘cholesteric liquid crystal—phase plate—metal’ structure / S. Y. Vetrov, M. V. Pyatnov, I. V. Timofeev // J. Opt. - 2016. - Vol. 18, Is. 1. - Ст. 015103, DOI 10.1088/2040-8978/18/1/015103. - Cited References:34. - This work was supported by the Russian Foundation for Basic Research, project no. 14-02-31248, and the Ministry of Education and Science of the Russian Federation, Government program, project no. 3.1276.2014/K. . - ISSN 2040-8978. - ISSN 2040-8986

РУБ Optics
Рубрики:
OPTICAL TAMM STATES
MODES
LIGHT
Кл.слова (ненормированные):
photonic band gap materials -- cholesteric liquid crystals -- localized -- states -- optical filters -- optical waveguides
Аннотация: We investigate the localized surface modes in a structure consisting of the cholesteric liquid crystal layer, a phase plate, and a metal layer. These modes are analogous to the optical Tamm states. The nonreciprocal transmission of polarized light propagating in the forward and backward directions is established. It is demonstrated that the transmission spectrum can be controlled by external fields acting on the cholesteric liquid crystal and by varying the plane of polarization of the incident light.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Pyatnov, M. V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ветров, Степан Яковлевич; Russian Foundation for Basic Research [14-02-31248]; Ministry of Education and Science of the Russian Federation, Government program [3.1276.2014/K]
}
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Shabanov, A. V.
Reflection spectrum of a cholesteric liquid crystal with structural defects / A. V. Shabanov, S. Y. Vetrov, A. Y. Karneev // JETP Letters. - 2004. - Vol. 80, Is. 3. - P. 181-184, DOI 10.1134/1.1808846. - Cited References: 13 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
MODES
Аннотация: An expression is obtained for the reflection coefficient of circularly polarized light normally incident on the film of a cholesteric liquid crystal with a variable helix pitch. It is shown that, in the case of a single defect (local change in the helix pitch), the spectrum of light reflection from a cholesteric acquires a dip corresponding to the defect mode. New qualitative features appear in the reflection spectrum of a cholesteric with two defects as the distance between them varies. (C) 2004 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State Technical Unversity, Krasnoyarsk, 660074, Russian Federation

Доп.точки доступа:
Vetrov, S. Y.; Karneev, A. Y.; Шабанов, Александр Васильевич
}
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Gorelik, V. S.
Raman scattering in sodium nitrite crystals near the phase transition / V. S. Gorelik, A. Y. Pyatyshev, A. S. Krylov // Phys. Solid State. - 2016. - Vol. 58, Is. 1. - P. 170-176, DOI 10.1134/S1063783416010133. - Cited References: 39. - This study was supported by the Russian Foundation for Basic Research (project nos. 12-02-00491, 13-02-00449, 13-02-90420, and 14-02-00190). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
NaNO2
   SPECTROSCOPY
   DEPENDENCE
   SPECTRUM
   SEARCH
   MODES
Аннотация: Optical Raman spectra of a ferroelectric sodium nitrite crystal have been detected in a wide spectrum range at various temperatures, including the region of the ferroelectric phase transition. A manifestation of a transverse soft polar mode of the A1(z) type responsible for the ferroelectric phase transition has been discovered in the spectrum at room temperature. This mode has been found to become overdamped even far from the ferroelectric phase transition temperature. This mode also appears as a central peak under heating. It has been found that the pseudoscalar mode of the A2 type has the highest intensity in the Raman spectrum of sodium nitrite. The frequency corresponding to the maximum intensity of this mode in the Raman spectrum varies from 130 cm–1 at 123 K to 106 cm–1 at T = 513 K. A fair agreement of the experimental data for the A1(z) mode with the Lyddane–Sachs–Teller relation has been established. The polariton curves for the A1(z) polar mode and the dispersion curves for axinons has been plotted. © 2016, Pleiades Publishing, Ltd.

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Публикация на русском языке Горелик, Владимир Семенович. Комбинационное рассеяние света в области фазового перехода в кристаллах нитрита натрия [Текст] / В. С. Горелик, А. Ю. Пятышев, А. С. Крылов // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2016. - Т. 58 Вып. 1. - С. 163-169

Держатели документа:
Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, Russian Federation
Bauman Moscow State Technical University, Vtoraya Baumanskaya ul. 5, Moscow, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Pyatyshev, A. Y.; Krylov, A. S.; Крылов, Александр Сергеевич
}
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Overcoming the adverse effects of substrate on the waveguiding properties of plasmonic nanoparticle chains / I. L. Rasskazov [et al.] // J. Appl. Phys. - 2016. - Vol. 119, Is. 4. - Ст. 043101, DOI 10.1063/1.4940415. - Cited References: 43. - This work has been carried out thanks to the support of the A*MIDEX project (No. ANR-11-IDEX-0001-02) funded by the “Investissements d'Avenir” French Government program, managed by the French National Research Agency (ANR) and was also supported in part by the U.S. National Science Foundation under Grant No. DMS1216970 and by the Ministry of Education and Science of the Russian Federation under Contract No. 1792. . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
LINEAR-CHAINS
   DISPERSION-RELATIONS
   ARRAYS
   RESONANCES
   GUIDES
   NANOSPHERES
   MODES
   FIELD
   POLARITONS
   PARTICLES
Аннотация: We have studied numerically the propagation of surface plasmon polaritons (SPPs) in linear periodic chains of plasmonic nanoparticles of different shapes. The chains are deposited on top of a thick dielectric substrate. While in many commonly considered cases the substrate tends to suppress the SPP propagation, we have found that this adverse effect is practically absent in the case when the nanoparticles have the shape of oblate spheroids with sufficiently small aspect ratio (e.g., nanodisks) whose axes of symmetry coincide with the axis of the chain. © 2016 AIP Publishing LLC.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
L. V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Aerospace Systems Dirct., Air Force Research Laboratory, Wright-Patterson Air Force Base, OH, United States
Aix-Marseille Universite, CNRS, Centrale Marseille, Institut Fresnel UMR 7249, Marseille, France
Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States

Доп.точки доступа:
Rasskazov, I. L.; Рассказов, Илья Леонидович; Karpov, S. V.; Карпов, Сергей Васильевич; Panasyuk, G. Y.; Markel, V. A.
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10.

Bikbaev, R. G.
Optical Tamm states at the interface between a photonic crystal and a gyroid layer / R. G. Bikbaev, S. Y. Vetrov, I. V. Timofeev // J. Opt. Soc. Am. B. - 2017. - Vol. 34, Is. 10. - P. 2198-2202, DOI 10.1364/JOSAB.34.002198. - Cited References:40. - Russian Foundation for Basic Research (RFBR), Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund (16-42-243065, 17-42-240464). . - ISSN 0740-3224. - ISSN 1520-8540

РУБ Optics
Рубрики:
RESONANCE NANOCOMPOSITE LAYER
BUTTERFLY WING SCALES
MODES
Аннотация: The spectral properties of a one-dimensional photonic crystal bounded by an absorbing plasmonic gyroid layer are investigated. The gyroid material is a foam-like metallic three-dimensionally periodic curved film with zero mean curvature at every point. We calculate the transmittance and reflectance spectra at the normal and oblique light incidence. The possibility of the Tamm state formation at the interface between a photonic crystal and a plasmonic gyroid layer caused by the negative real part of the gyroid permittivity is demonstrated for the first time. Specific features of field localization at the Tamm state frequencies are discussed. It is shown that the spectral and polarization properties of the optical Tamm states are highly sensitive to the change in the angle of incidence and in the refractive index of a medium filling the gyroid cavities.

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Держатели документа:
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Бикбаев, Рашид Гельмединович; Russian Foundation for Basic Research (RFBR), Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-42-243065, 17-42-240464]
}
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