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Ultranarrow resonance peaks in the transmission and reflection spectra of a photonic crystal cavity with Raman gain / V. G. Arkhipkin, S. A. Myslivets // ArXiv. - 2009. - Ст. 0909.0092

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Доп.точки доступа:
Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Myslivets, S. A.; Мысливец, Сергей Александрович
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Reflection electron energy loss spectroscopy of structures based on silicon and transition metals / A. S. Parshin [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. - 2017. - Vol. 255, Is. 1. - Ст. 012019, DOI 10.1088/1757-899X/255/1/012019. - Cited References: 24
Кл.слова (ненормированные):
Dissociation -- Electron emission -- Electron energy levels -- Electron scattering -- Electrons -- Energy dissipation -- Iron -- Iron compounds -- Silicides -- Silicon compounds -- Transition metals
Аннотация: The investigation of iron silicides FeSi2, FeSi and Fe5Si3 with the methods of reflection electron energy loss spectroscopy and inelastic electron scattering cross-section spectroscopy was carried out. It is shown that the shape and peak energy position of electron energy loss spectra are almost identical to silicides with different composition, while the amplitude of inelastic electron scattering cross-section spectra decreases with increasing of iron content. The decomposition of inelastic electron scattering cross-section spectra of FeSi2, FeSi and Fe5Si3 to Tougaard peaks is used for unresolved energy loss peaks analysis, determination its energies and identification bulk and surface peaks. The amplitude of fitting peak describing bulk plasmon excitation can be used for identification of the iron silicides with different composition.

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Доп.точки доступа:
Parshin, A. S.; Паршин, Анатолий Сергеевич; Igumenov, A. Y.; Mikhlin, Y. L.; Михлин, Юрий Леонидович; Pchelyakov, O. P.; Zhigalov, V. S.; Жигалов, Виктор Степанович; International Scientific Conference Reshetnev Readings(20 ; 2016 ; Nov. 9-12 ; Krasnoyarsk)
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Angle-resolved reflection spectroscopy of high-quality PMMA opal crystal / I. V. Nemtsev [et al.] // Photonics Nanostruc. Fundam. Appl. - 2018. - Vol. 28. - P. 37-44, DOI 10.1016/j.photonics.2017.11.007. - Cited References: 72. - This study was supported by the Russian Foundation for Basic Research (Grant No. 16-32-00302 мол_а ), by the Council for Grants of the President of the Russian Federation ( SP-317.2015.1 ), by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 16-42-243059 р_мол_а and No. 16-48-242092 р_офи_м, and by the Program of Foundation for Promotion of Small Enterprises in Science and Technology (No.6662ГУ2015) (“УМНИК” program). We acknowledge the support of Krasnoyarsk Regional Center for Collective Use of SB of RAS for equipment and technique. We thank A. V. Shabanov and O. V. Shabanova for assistance in dispersion preparation. We also thank V. G. Myagkov for useful discussion of the results. . - ISSN 1569-4410
Кл.слова (ненормированные):
PMMA opal -- Photonic crystal -- Electron microscopy -- Angular resolved reflective spectroscopy
Аннотация: PMMA opal crystal was prepared by a simple hybrid method, which includes sedimentation, meniscus formation and evaporation. We investigated three surfaces of this crystal by angle-resolved reflective light spectroscopy and SEM study. The angle-resolved reflective measurements were carried out in the 400–1100 nm range. We have determined the high-quality ordered surface of the crystal region. Narrow particle size distribution of the surface has been revealed. The average particle diameter obtained with SEM was nearly 361 nm. The most interesting result was that reflectivity of the surface turned out up to 98% at normal light incidence. Using a fit of dependences of the maximum reflectivity wavelength from an angle based on the Bragg–Snell law, the wavelength of maximum 0° reflectivity, the particle diameter and the fill factor have been determined. For the best surface maximum reflectivity wavelength of a 0° angle was estimated to be 869 nm. The particle diameter and fill factor were calculated as 372 nm and 0.8715, respectively. The diameter obtained by fitting is in excellent agreement with the particle diameter obtained with SEM. The reflectivity maximum is assumed to increase significantly when increasing the fill factor. We believe that using our simple approach to manufacture PMMA opal crystals will significantly increase the fabrication of high-quality photonic crystal templates and thin films

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Держатели документа:
Federal Research Centre Krasnoyarsk Scientific Center of the Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Centre Krasnoyarsk Scientific Center of the Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Nemtsev, I. V.; Немцев, Иван Васильевич; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
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Val'kov, V. V.
Effect of total reflection from a symmetric two-channel device with fermion path nonanalyticity points induced by Rashba spin-orbit coupling / V. V. Val’kov, A. D. Fedoseev // Bull. Russ. Acad. Sci. Phys. - 2018. - Vol. 82, Is. 5. - P. 550-553, DOI 10.3103/S1062873818050313. - Cited References: 8. - The reported study was funded by Russian Foundation for Basic Research (project nos. 16-42-242036, 16-42-243056, and 17-42-240441), Government of Krasnoyarsk Territory, and Krasnoyarsk Region Science and Technology Support Fund to the research (project nos. 22/17, 24/17, and 02/17). . - ISSN 1062-8738
Кл.слова (ненормированные):
Electron transport -- Nonanalyticity -- Rashba spin-orbit coupling -- Regular polygon -- Spin-orbit couplings -- Symmetric systems -- Total reflection -- Transmission coefficients
Аннотация: The effect Rashba spin-orbit coupling has on transmission coefficient through a symmetric system with fermion path nonanalyticity points is illustrated using the example of a regular polygon-shaped chain. It is shown that the current passage through a device is blocked at the critical spin-orbit coupling values determined by the system’s geometry. At the near-critical spin-orbit coupling values, electron transport is possible only in a narrow range of energies.

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Публикация на русском языке Вальков, Валерий Владимирович. Эффект полного отражения электронов от симметричного двухканального устройства с точками неаналитичности фермионных траекторий, вызванный спин-орбитальным взаимодействием Рашбы [Текст] / В. В. Вальков, А. Д. Федосеев // Изв. РАН. Сер. физич. - 2018. - Т. 82 № 5. - С. 622-625

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Fedoseev, A. D.; Федосеев, Александр Дмитриевич; Вальков, Валерий Владимирович
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    Музалевский, Константин Викторович.
    Дистанционное измерение профилей влажности в пахотном слое почвы на основе поляриметрических наблюдений коэффициента отражения в P- и C-диапазонах частот. Эксперимент / К. В. Музалевский // Соврем. проблемы дистанц. зондир. Земли из космоса. - 2020. - Т. 17, № 3. - С. 145-148, DOI 10.21046/2070-7401-2020-17-3-145-148. - Библиогр.: 5. - Работа выполнена в рамках проекта Российского фонда фундаментальных исследований № 18-05-00405, методика измерения коэффициентов отражения была развита при поддержке проекта государственного задания № 0356-2019-0004 . - ISSN 2070-7401. - ISSN 2411-0280
   Перевод заглавия: Remote sensing of moisture profiles in the arable soil layer based on polarimetric observations of the reflection coefficient in the P- and C-bands. Experiment
Кл.слова (ненормированные):
радиолокация -- беспилотный летательный аппарат -- агропочвы -- влажность почвы -- пахотный слой -- диэлектрическая проницаемость -- Radar -- Unmanned aerial vehicle -- Agricultural soils -- Soil moisture -- Arable layer -- Dielectric constant
Аннотация: В данном сообщении экспериментально подтверждена принципиальная возможность дистанционного измерения профилей влажности в пахотном слое почвы с пригодной для практического применения точностью на основе поляриметрических измерений коэффициента отражения на двух частотах 630 МГц и 5,4 ГГц. Коэффициенты отражения измерялись под углом 35° импульсным методом в ходе естественных циклов испарения и увлажнения пахотного слоя почвы на участке сельскохозяйственного поля, находящегося под паром в районе пос. Минино, Красноярский край. Профили влажности почвы восстанавливались в ходе решения обратной задачи, информативным признаком в которой выступало отношение коэффициентов обратного радарного рассеяния на согласованных линейных поляризациях. Отношение коэффициентов обратного радарного рассеяния было оценено в скалярном приближении метода Кирхгофа в виде отношения коэффициентов отражения по мощности, измеренных на горизонтальной и вертикальной поляризациях. Среднеквадратическое отклонение и коэффициент детерминации между восстановленными и измеренными значениями объёмной влажности в поверхностном слое почвы толщиной 10 см оказались равны 2,2 % и 0,91 соответственно. Исследование показывает перспективность разработки поляриметрических многочастотных радиолокационных систем комбинированного сверхвысокочастотного и дециметрового диапазонов для дистанционного зондирования профилей влажности пахотного слоя почв.
This report experimentally confirmed the fundamental possibility of remote sensing of moisture profiles in the arable soil layer with practical acceptable accuracy based on polarimetric measurements of the reflection coefficient at two frequencies of 630 MHz and 5.4 GHz. Reflection coefficients were measured at an angle of 35° by the impulse method, during natural cycles of the evaporation and moistening of soil arable layer in a plot of an agricultural field under steam in the area of Minino village, Krasnoyarsk region. Soil moisture profiles were retrieved in the course of solving the inverse problem, in which cost function was the ratio of the backscattering coefficients taken on coincident linear polarizations. The ratio of the backscattering coefficients was estimated by the scalar Kirchhoff approximation in the form of a ratio of power reflection coefficients, which were measured on horizontal and vertical polarizations. The standard deviation and the determination coefficient between the retrieved and measured soil moisture in the 10 cm topsoil were 2.2 % and 0.91, respectively. The study shows the prospects of developing polarimetric multi-frequency radar systems of combined UHF and SHF bands for remote sensing of moisture profiles in the arable layer of soils.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Muzalevskiy, K. V.
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Critical coupling vortex with grating-induced high Q-factor optical Tamm states / R. G. Bikbaev, D. N. Maksimov, P. S. Pankin [et al.] // Opt. Express. - 2021. - Vol. 29, Is. 3. - P. 4672-4680, DOI 10.1364/OE.416132. - Cited References: 54. - Funding. Ministry of Science and Technology, Taiwan (108-2923E-009-003-MY3); Russian Foundation for Basic Research (19-52-52006); Council on grants of the President of the Russian Federation (MK-46.2021.1.2) . - ISSN 1094-4087
Кл.слова (ненормированные):
Angle of Incidence -- Bound state -- Coupled mode theory -- Critical coupling -- Dielectric grating -- High Q-factor -- Reflectance amplitudes -- Reflection amplitude
Аннотация: We investigate optical Tamm states supported by a dielectric grating placed on top of a distributed Bragg reflector. It is found that under certain conditions the Tamm state may become a bound state in the continuum. The bound state, in its turn, induces the effect of critical coupling with the reflectance amplitude reaching an exact zero. We demonstrate that the critical coupling point is located in the core of a vortex of the reflection amplitude gradient in the space of the wavelength and angle of incidence. The emergence of the vortex is explained by the coupled mode theory.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Imaging and Biomedical Photonics, National Chiao Tung University, Tainan, 71150, Taiwan

Доп.точки доступа:
Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Pankin, P. S.; Панкин, Павел Сергеевич; Chen, K. -P.; Timofeev, I. V.; Тимофеев, Иван Владимирович
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Si/Fe flux ratio influence on growth and physical properties of polycrystalline β-FeSi2 thin films on Si(100) surface / I. A. Tarasov [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440. - P. 144-152, DOI 10.1016/j.jmmm.2016.12.084. - Cited References:39. - This work was supported by the Russian Science Foundation, project no. 16-13-00060 . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SEMICONDUCTING FESI2 FILMS
SPECTROSCOPIC ELLIPSOMETRY
EPITAXIAL-FILMS
Кл.слова (ненормированные):
β-FeSi2 iron disilicide -- Optical properties -- Reflection high-energy -- electron diffraction -- Raman spectroscopy -- ab initio calculation
Аннотация: This work investigates the Si/Fe flux ratio (2 and 0.34) influence on the growth of β-FeSi2 polycrystalline thin films on Si(100) substrate at 630 °C. Lattice deformations for the films obtained are confirmed by X-ray diffraction analysis (XRD). The volume unit cell deviation from that of β-FeSi2 single crystal are 1.99% and 1.1% for Si/Fe =2 and Si/Fe =0.34, respectively. Absorption measurements show that the indirect transition (~ 0.704 eV) of the Si/Fe =0.34 sample changes to the direct transition with a bandgap value of ~0.816 eV for the sample prepared at Si/Fe =2. The absorption spectrum of the Si/Fe =0.34 sample exhibits an additional peak located below the bandgap energy value with the absorption maximum of ~0.36 eV. Surface magneto-optic Kerr effect (SMOKE) measurements detect the ferromagnetic behavior of the β-FeSi2 polycrystalline films grown at Si/Fe =0.34 at T=10 K, but no ferromagnetism was observed in the samples grown at Si/Fe =2. Theoretical calculations refute that the cell deformation can cause the emergence of magnetization and argue that the origin of the ferromagnetism, as well as the lower absorption peak, is β-FeSi2 stoichiometry deviations. Raman spectroscopy measurements evidence that the film obtained at Si/Fe flux ratio equal to 0.34 has the better crystallinity than the Si/Fe =2 sample.

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Доп.точки доступа:
Tarasov, I. A.; Тарасов, Иван Анатольевич; Visotin, M. A.; Высотин Максим Александрович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Kosyrev, N. N.; Косырев, Николай Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Krylov, A. S.; Крылов, Александр Сергеевич; Fedorov, A. S.; Федоров, Александр Семенович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science Foundation [16-13-00060]; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
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Reflection electron energy loss spectroscopy of iron monosilicide / A. S. Parshin [et al.] // Russ. Phys. J. - 2017. - Vol. 59, Is. 10. - P. 1610-1615, DOI 10.1007/s11182-017-0952-7. - Cited References:14 . - ISSN 1064-8887. - ISSN 1573-9228

РУБ Physics, Multidisciplinary
Рубрики:
SCATTERING CROSS-SECTION
SPECTRA
Кл.слова (ненормированные):
iron silicides -- iron monosilicide -- inelastic electron scattering cross -- section spectroscopy -- reflection electron energy loss spectroscopy -- x-ray photoelectron spectroscopy
Аннотация: X-ray photoelectron spectra, reflection electron energy loss spectra, and inelastic electron scattering cross section spectra of iron monosilicide FeSi are investigated. It is shown that the spectra of inelastic electron scattering cross section have advantages over the reflection electron energy loss spectra in studying the processes of electron energy losses. An analysis of the fine structure of the inelastic electron scattering cross section spectra allows previously unresolved peaks to be identified and their energy, intensity, and nature to be determined. The difference between energies of fitting loss peaks in the spectra of inelastic electron scattering cross section of FeSi and pure Fe are more substantial than the chemical shifts in X-ray photoelectron spectra, which indicates the possibility of application of the fine structure of the spectra of inelastic electron scattering cross section for elemental analysis.

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Публикация на русском языке Спектроскопия потерь энергии отраженных электронов моносилицида железа [Текст] / А. С. Паршин [и др.] // Изв. вузов. Физика. - 2016. - Т. 59 № 10. - С. 82-86

Держатели документа:
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk, Russia.
Russian Acad Sci, AV Rzhanov Inst Semicond Phys, Novosibirsk, Russia.
Russian Acad Sci, LV Kirensky Inst Phys, Krasnoyarsk, Russia.

Доп.точки доступа:
Parshin, A. S.; Igumenov, A. Yu.; Mikhlin, Yu. L.; Pchelyakov, O. P.; Zhigalov, V. S.; Жигалов, Виктор Степанович
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Polarization-preserving anisotropic mirror on the basis of metal–dielectric nanocomposite / N. V. Rudakova [et al.] // Bull. Russ. Acad. Sci. Phys. - 2017. - Vol. 81, Is. 1. - P. 5-9, DOI 10.3103/S1062873817010257. - Cited References: 11. - The reported study was funded by the Ministry of Education and Science of the Russian Federation, project no. 3.1211.2017/PCH; SB RAS no. II.2P (0358-2015-0010); Scholarship of the President of the Russian Federation no. SP-227.2016.5; RFBR and Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project no. 16-42-243065. . - ISSN 1062-8738
Кл.слова (ненормированные):
Anisotropy -- Metal nanoparticles -- Mirrors -- Nanocomposites -- Nanoparticles -- Polarization -- Silver -- A-plane -- Reflected light -- Reflection spectra -- Transparent matrix -- Metallic matrix composites
Аннотация: The model of a polarization-preserving anisotropic mirror is proposed. The mirror is a plane boundary of a metal–dielectric nanocomposite that consists of silver spheroidal nanoparticles dispersed in a transparent matrix. The dependence of reflection spectra on the shape of the nanoparticles is studied. It is shown that in one region of the spectrum, the mirror preserves the sign of polarization in the reflected light. © 2017, Allerton Press, Inc.

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Публикация на русском языке Coхраняющее поляризацию анизотропное зеркало на основе металл-диэлектрического нанокомпозита [Текст] / Н. В. Рудакова [и др.] // Изв. РАН. Сер. физич. - 2017. - Т. 81 № 1. - С. 10-14

Держатели документа:
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Laboratory of Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Rudakova, N. V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Pankin, P. S.; Vetrov, S. Ya.; Ветров, Степан Яковлевич
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10.

    Mikhaylov, M. I.
    Testing semi-empirical model of reflection coefficient based on GNSSR measurements / M. I. Mikhaylov, K. V. Muzalevskiy, V. L. Mironov // IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens. : Proc. - 2016. - P. 5264 - 5267, DOI 10.1109/IGARSS.2016.7730371. - The study was performed thanks to a grant from the Russian Science Foundation (project №14-17-00656) . - ISSN 978-1-509. - ISSN 2153-7003
   Перевод заглавия: Тестирование полу-эмпирической модели коэффициента отражения основанного на ГНСС измерениях
Кл.слова (ненормированные):
permittivity model -- SMOS -- microwave radiometry -- Arctic tundra -- soil moisture -- soil temperature
Аннотация: In this paper, with using of semi-empirical model of the reflection coefficient, which is implementing to calculate the brightness temperature of the SMOS spacecraft at 1.4GHz in [1], [2] the soil moisture was retrieved from the reflection coefficients, which were measured by GNSS-reflectometer at a test site on the Yamal Peninsula. The model of reflection coefficient with root-mean square error (RMSE) of 0.04 allows to predict the experimental values of the reflection coefficient and with RMSE of less than 0.09cm3/cm3 allows to retrieve the soil moisture in the layer of 0-6cm

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Доп.точки доступа:
Muzalevskiy, K. V.; Музалевский, Константин Викторович; Mironov, V. L.; Миронов, Валерий Леонидович; Михайлов, Михаил Иванович; IEEE International Geoscience and Remote Sensing Symposium(2016 ; July ; 10-15 ; Beijing, China)
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11.

Belyaev, B. A.
Scattering of electromagnetic waves by a metal lattice placed at the interface of two media / B. A. Belyaev, V. V. Tyurnev // J. Commun. Technol. Electron. - 2017. - Vol. 62, Is. 7. - P. 750-758, DOI 10.1134/S1064226917070026. - Cited References: 24 . - ISSN 1064-2269
Кл.слова (ненормированные):
Bandpass filters -- Electromagnetic waves -- Frequency bands -- Frequency response -- Optical multilayers -- Reflection -- Dielectric layer -- Efficient control -- Electromagnetic analysis -- Lattice periods -- Metal lattices -- Optical bandpass filters -- Scattering matrices -- Scattering of electromagnetic waves -- Electromagnetic wave scattering
Аннотация: Simple formulas for determination of components of the scattering matrix of a plane electromagnetic wave incident along the normal onto a thin infinite 2D metal lattice with square windows placed at the interface of two media are derived for the first time. Frequency responses (FRs) of this structure calculated with the use of these formulas agree well with responses obtained by the numerical electromagnetic analysis of a 3D model in the case when the lattice period is less than one-half of the wavelength. The capability of efficient control of the FR of the analyzed structure by means of variation in the width of conductors and the lattice period enables application of this lattice for fabrication of a reflector with prescribed reflectivity. Such reflectors at interfaces of dielectric layers are required, for example, in the design of multilayer sufaces radio transparent in a specified frequency band or optical bandpass filters.

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Публикация на русском языке Беляев, Борис Афанасьевич. Рассеяние электромагнитных волн на металлической решетке, расположенной на границе раздела двух сред [Текст] / Б. А. Беляев, В. В. Тюрнев // Радиотехн. и электроника. - 2017. - Т. 62 № 7. - С. 642-650

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tyurnev, V. V.; Тюрнев, Владимир Вениаминович; Беляев, Борис Афанасьевич
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12.

    Two-layer model of reflective ferromagnetic films in terms of magneto-optical ellipsometry studies / O. A. Maximova [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 2. - P. 223-232 ; Журн. СФУ. Сер. "Математика и физика", DOI 10.17516/1997-1397-2017-10-2-223-232. - Cited References: 13. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project 16–42–243058. The work was supported partly by the Russian Foundation for Basic Research, Grant No. 16–32–00209 mola, Grant No. 14–02–01211; the Complex program of SB RAS No. II.2P, project 0358–2015–0004; the Ministry of Education and Science of the RF (State task No. 16.663.2014); grant Scientific School 7559.2016.2. . - ISSN 1997-1397
   Перевод заглавия: Двухслойная модель отражающих ферромагнитных пленок для исследования тонких пленок методом магнитоэллипсометрии
Кл.слова (ненормированные):
Magneto-optical ellipsometry -- Kerr effect -- Two-layer model -- Ferromagnetic metal -- Reflection -- Growth control -- магнито-оптическая эллипсометрия -- эффект Керра -- двухслойная модель -- ферромагнетик -- отражение -- контроль роста
Аннотация: An approach to analysis of magneto-optical ellipsometry measurements is presented. A two-layer model of ferromagnetic reflective films is in focus. The obtained algorithm can be used to control optical and magneto-optical properties during films growth inside vacuum chambers.
Представлен метод анализа магнито-эллипсометрических измерений. Детально рассматривается двуслойная модель ферромагнитных отражающих пленок. Полученный алгоритм может использоваться для контроля оптических и магнито-оптических свойств пленок в процессе их роста в вакуумных камерах.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50/38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsky Rabochy, 31, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Maximova, O. A.; Максимова, Ольга Александровна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Kosyrev, N. N.; Косырев, Николай Николаевич; Lyashchenko, S. A.; Лященко, Сергей Александрович

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13.

Bifurcations of coupled electron-phonon modes in an antiferromagnet subjected to a magnetic field / K. N. Boldyrev [et al.] // Phys. Rev. Lett. - 2017. - Vol. 118, Is. 16. - Ст. 167203, DOI 10.1103/PhysRevLett.118.167203. - Cited References: 26. - This research was supported by the Russian Scientific Foundation under Grant No. 14-12-01033, the President of Russian Federation (MK-3577.2017.2, K. N. B.), and the U.S. Department of Energy under Grant No. DE-FG02-07ER46382 (experiments at U4-IR beam line NSLS-BNL, T. N. S. and A. A. S.). The National Synchrotron Light Source is operated as a user facility for the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. Part of this work was supported by EMFL (Contract No. 26211). M. N. P. thanks B. Z. Malkin and A. V. Popov for helpful discussions. . - ISSN 0031-9007
Кл.слова (ненормированные):
Antiferromagnetic materials -- Bifurcation (mathematics) -- Electron-phonon interactions -- Electrons -- Magnetic fields -- Magnetism -- Temperature -- Antiferromagnetic crystals -- Bifurcation points -- Electron phonon couplings -- Electronic excitation -- External magnetic field -- Field independents -- Low temperatures -- Reflection spectra -- Phonons
Аннотация: We report on a new effect caused by the electron-phonon coupling in a stoichiometric rare-earth antiferromagnetic crystal subjected to an external magnetic field, namely, the appearance of a nonzero gap in the spectrum of electronic excitations in an arbitrarily small field. The effect was registered in the low-temperature far-infrared (terahertz) reflection spectra of an easy-axis antiferromagnet PrFe3(BO3)4 in magnetic fields Bext-c. Both paramagnetic and magnetically ordered phases (including a spin-flop one) were studied in magnetic fields up to 30 T, and two bifurcation points were observed. We show that the field behavior of the coupled modes can be successfully explained and modeled on the basis of the equation derived in the framework of the theory of coupled electron-phonon modes, with the same field-independent electron-phonon interaction constant |W|=14.8 cm-1. © 2017 American Physical Society.

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Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russian Federation
Department of Physics, New Jersey Institute of Technology, Newark, NJ, United States
High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
Kirenskiy Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Boldyrev, K. N.; Stanislavchuk, T. N.; Sirenko, A. A.; Kamenskyi, D.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Popova, M. N.
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14.

Photonic crystal structures based on submicron particles of polymethyl methacrylate / I. V. Nemtsev, O. V. Shabanova, N. P. Shestakov [et al.] // J. Phys. Conf. Ser. - 2021. - Vol. 1745: 6th International Conference on Information Technology and Nanotechnology, ITNT 2020 (26 - 29 May 2020, Samara, Russian Federation) Conference code: 167456, Is. 1. - Ст. 012024DOI 10.1088/1742-6596/1745/1/012024. - Cited References: 27. - We are grateful to the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» for the provided equipment. The authors are also grateful to the Russian Foundation for Basic Research for financial support (grant No.18-42-243013)
Кл.слова (ненормированные):
IR absorption spectra -- Morphological parameters -- Photonic crystal films -- Poly(methyl methacrylate) (PMMA) -- Reflection spectra -- Resonance structure -- Sub-micron particles -- Submicron-sized spheres
Аннотация: Morphological parameters, reflection spectra, IR absorption spectra, and glass transition temperatures of submicron-sized spheres of poly(methyl methacrylate) (PMMA) formed in a water-acetone dispersion medium were studied in comparison with similar spheres obtained in distilled water. Dependence of a shrinkage degree of the submicrospheres on the concentration of acetone in water is studied. Features of the formation of periodic structures based on the water-acetone dispersions of PMMA in four different ways are considered. 2D (photonic crystal films) and 3D (artificial and inverse opals) resonance structures were obtained.

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Держатели документа:
Fed. Res. Ctr. Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok street 50, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Fed. Res. Ctr. Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok street 50, bul. 38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny ave. 79, Krasnoyarsk, 660041, Russian Federation
Spec. Des. and Technol. Bur. Nauka Fed. Res. Ctr. Krasnoyarsk Sci. Ctr. of the Siberian Br. of the Russ. Acad. of Sci., Akademgorodok street 50, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Nemtsev, I. V.; Немцев, Иван Васильевич; Shabanova, O. V.; Shestakov, N. P.; Шестаков, Николай Петрович; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Cherepakhin, A. V.; Черепахин, Александр Владимирович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; International Conference on Information Technology and Nanotechnology(6 ; 2020 ; May 26 - 29 ; Samara, Russian Federation)
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15.

Muzalevskiy, K. V.
Numerical-analytical model of reflection coefficient for rough soil surface in wide frequency range / K. Muzalevskiy // Proceedings - 2022 IEEE 8th All-Russian Microwave Conference, RMC 2022. - 2022. - 8th IEEE All-Russian Microwave Conference, RMC 2022 (23 - 25 November 2023, Moscow, Russian Federation) Conference code: 187597. - P. 305-308, DOI 10.1109/RMC55984.2022.10079255. - Cited References: 18. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project №22-17-20042
Кл.слова (ненормированные):
remote sensing -- radiolocation -- radiometry -- reflectometry -- reflection coefficient -- rough surface -- soils -- complex permittivity of soils -- soil moisture
Аннотация: In this work, a numerical-analytical model of reflection coefficient for rough soil surface in wide frequency band was proposed. The field of reflected wave from the rough soil surface is presented as the sum of secondary fields from an infinite set of elementary horizontal scattering plates (with a given average size). The field from each elementary scattering plate is represented as an average field from the result of stochastic interference of an infinite set of coherent elementary sources of secondary waves. The vertical position of the elementary sources is determined by the stochastic height of the soil surface within elementary plate. The case of the coherent component and the total value (coherent+diffuse components) of reflection coefficient is considered. On the basis of the created model of reflection coefficient, a broadband method for simultaneously retrieved the root-mean-square deviation of the stochastic soil surface heights and volumetric soil moisture was developed. The results have a wide application value both for single-frequency and multi-frequency radar and radiometric methods of soil moisture measuring.

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Держатели документа:
Kirensky Institute of Physics Federal Research, Center Ksc Siberian Branch Russian Academy of Science, Laboratory of Radiophysics of the Earth Remote Sensing, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Музалевский, Константин Викторович; IEEE All-Russian Microwave Conference(8 ; 23 - 25 November 2023 ; Moscow, Russian Federation)
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16.

Tiling photonic topological insulator for laser applications / P. N. Kim, D. P. Fedchenko, N. V. Rudakova, I. V. Timofeev // Appl. Sci. - 2023. - Vol. 13, Is. 6. - Ст. 4004, DOI 10.3390/app13064004. - Cited References: 31. - This research was funded by the Russian Science Foundation (project no. 22-42-08003). - The authors are grateful to V.M. Sventitskii for useful discussions and materials used for experiment . - ISSN 2076-3417
Кл.слова (ненормированные):
photonic topological insulator -- total internal reflection -- topological insulator laser
Аннотация: A photonic topological insulator is a structure that isolates radiation in the bulk rather than at the edge (surface). Paradoxically, applications of such an insulator focus on its conducting edge states, which are robust against structural defects. We suggest a tiling photonic topological insulator constructed from identical prism resonators connected to each other. The light beam circulates inside the tiling bulk without propagation. However, we experimentally demonstrate a topologically-protected propagating state due to the disconnected faces of the edge resonators. The investigated state is robust against removing or attaching prism resonators. Moreover, the protection principle is phase-free and therefore highly scalable both in wavelength and resonator size. The tiling is suggested for active topological photonic devices and laser arrays.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Siberian Federal University, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Kim, P. D.; Ким, Петр Дементьевич; Fedchenko, D. P.; Федченко, Дмитрий Петрович; Rudakova, N. V.; Рудакова, Наталья Викторовна; Timofeev, I. V.; Тимофеев, Иван Владимирович
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17.

Reflection electron energy loss spectra and inelastic electron scattering cross sections for Fe/Si magnetic layred nanostrutures [Текст] / A. M. Parshin, G. A. Alexandrova, S. G. Ovchinnikov, S. N. Varnakov // Moscow Int. Symp. on Magnet. (MISM-2008) : June 20-25, 2008, Moscow : book of abstract. - 2008. - Ст. 22PO-8-55. - p. 307. - Библиогр.: 2. - This work was supported by the SB RAS integration project 3.5 and by the “Spintronics” program of the Division of Physical Sciences of the RAS

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Доп.точки доступа:
Parshin, A. M.; Паршин, Александр Михайлович; Alexandrova, G. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Moscow International Symposium on Magnetism(4 ; 2008 ; Jun. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
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18.

New regions of the selective reflection of light in encapsulated cholesterics containing pyrimidine additives / S. Ya. Vetrov, A. Ya. Korets, G. M. Zharkova [et al.] // Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. - 2001. - Т. 16, № 10. - P. 1639-1651

РИНЦ
Держатели документа:
Inst. of Theor./Applied Mechanics|Siberian Branch|Russian Academy of Sciences
Krasnoyarsk Stt. Tech. University
L. V. Kirenskii Institute of Physics|Siberian Branch|Russian Academy of Sciences

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Korets, A. Ya.; Zharkova, G. M.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Shabanov, V. F.; Шабанов, Василий Филиппович
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19.

Muzalevskiy, K. V.
UWB reflectometric method for the measuring of vegetation biometric parameters and soil moisture / K. Muzalevskiy, S. Fomin, M. Mikhaylov // IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology (USBEREIT). - 2023. - P. 166-169, DOI 10.1109/USBEREIT58508.2023.10158880. - Cited References: 17. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project № 22-17-20042
Кл.слова (ненормированные):
Microwave remote sensing -- unmanned aerial vehicle -- ultra-wide band remote sensing -- reflection coefficient -- biomass -- vegetation water content -- soil moisture
Аннотация: In this article, a method for the simultaneous measurement of total biomass, vegetation water content, and soil moisture is developed based on ultra-wideband (UWB) nadir observation of the reflection coefficient in the frequency range from 450 MHz to 6 GHz. The proposed method is based on a simple model of plane wave reflection from a vegetation layer with flat boundaries lying on a smooth soil surface. The model does not take into account the phenomena of wave scattering on the vegetation elements and the soil surface roughness. The dielectric constant of the vegetation canopy and soil were calculated based on Ulaby and Mironov dielectric models, respectively. The proposed method was tested using data from PORTOS-93 (INRA) experiments on measuring: total biomass (up to 3.3 kg/m2), water content (43%-89%), height (up to 1m) and volumetric content (up to 0.6-0.8%) of wheat plants, moisture (from 5% to 36%), density and clay fraction content (27%) of the soil. As a result, it was shown, the coefficient of determination (R2) and root-mean-square error (RMSE) appeared to be equal to R2=0.999 and RMSE=2.2% when comparing the original and retrieved values of volumetric soil moisture. The retrieved values of total biomass (vegetation water content) with the coefficient of determination R2=0.999 (0.998) and RMSE=16g/m2 (0.7%) coincide with the original set values. Therewith, the bands from 4 GHz to 6 GHz and from 450 MHz to 1 GHz were used to retrieve the canopy biometric parameters and soil moisture, respectively.

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Laboratory of Radiophysics of the Earth Remote Sensing, Kirensky Institute of Physics Federal Research Center KSC Siberian Branch Russian Academy of Science, Krasnoyarsk, The Russian Federation

Доп.точки доступа:
Fomin, S. V.; Фомин, Сергей Викторович; Mikhaylov, M. I.; Михайлов, Михаил Иванович; Музалевский, Константин Викторович; IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology(15-17 May 2023 ; Yekaterinburg, Russia)
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20.

Muzalevskiy, K. V.
Calibration of UWB UAV radar for the remote measurement of reflection coefficient / K. Muzalevskiy, M. Mikhaylov, Z. Ruzicka // IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology (USBEREIT). - 2023. - P. 105-108, DOI 10.1109/USBEREIT58508.2023.10158870. - Cited References: 16. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project № 22-17-20042
Кл.слова (ненормированные):
Microwave remote sensing -- ultra-wide band remote sensing -- unmanned aerial vehicle -- log-periodic dipole antenna -- reflection coefficient
Аннотация: In this work, the possibility of the remote measurement of reflection coefficient in the ultra-wide frequency range from 425 MHz to 1010 MHz from the board of unmanned aerial vehicle (UAV) using ultra-wide band (UWB) radar was investigated. With this in mind, the antenna-feeder path of UAV UWB radar is calibrated. The calibration process consisted in measuring the reflection coefficient from the brass mesh sheet at various UAV hovering heights. Printed log-periodic dipole antenna was used as transmitter-receiver antenna. As a result, the antenna return loss in an empty-room and the complex antenna response function of the antenna-feeder path of the UAV UWB radar were found. It is shown that the amplitude of the reflected wave from a brass mesh sheet can be measured with root-mean square error (RMSE), RMSE=0.017 1/m and a determination coefficient (R 2 ) of R 2 = 0.967. Therewith the UAV hovering heights measured by the pulse method and the on-board laser rangefinder correlates with each other with R2=0.999 and with RMSE=3.5cm (distance measurement error of the laser rangefinder is ±1cm, surface irregularities of the brass mesh sheet were no more than 1.5cm). Measured in the frequency range from 500 MHz to 900 MHz, the reflection coefficient from fresh lake water by UAV UWB radar with a relative error of no more than 7.5% (practically does not depend on the height of the UAV hovering, approximately from 2.2 m to 5.2 m) coincides with the calculated one by the Stogryn's formulas.

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Держатели документа:
Laboratory of Radiophysics of the Earth Remote Sensing, Kirensky Institute of Physics Federal Research Center KSC Siberian Branch Russian Academy of Science, Krasnoyarsk, The Russian Federation

Доп.точки доступа:
Mikhaylov, M. I.; Михайлов, Михаил Иванович; Ruzicka, Z.; Ружичка, Зденек; Музалевский, Константин Викторович; IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology(15-17 May 2023 ; Yekaterinburg, Russia)
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