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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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Electro-optical response of a monolayer polymer dispersed nematic liquid crystal film doped with surfactant / V. A. Loiko, A. V. Konkolovich, A. A. Miskevich [et al.] // Liquid Crystal Polymer Nanocomposites : Woodhead Publishing, 2022. - Chapter 7. - P. 163-211, DOI 10.1016/B978-0-12-822128-0.00006-6. - Cited References: 86
Кл.слова (ненормированные):
Polymer dispersed liquid crystal film -- Liquid crystal droplet -- Transmission -- Angular distribution of scattered light -- Quenching effect -- Symmetry breaking effect -- Photonic band gap
Аннотация: Light scattering and transmission by a monolayer polymer dispersed liquid crystal film containing liquid crystal droplets with inhomogeneous anchoring of liquid crystal molecules at the polymer-droplet interface is considered theoretically and experimentally. The developed optical model is based on the anomalous diffraction and interference approximations of the theory of scattering of waves. It is applied to describe the interference quenching effect for the coherently transmitted light and electrically controllable symmetry breaking effect in small-angle structure of light scattered by film containing droplets with inhomogeneous anchoring. The analysis of transmittance and reflectance of the one-dimensional photonic crystals composed of monolayers is carried out. The formation of the photonic band gaps is analyzed.

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Держатели документа:
Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
Kirensky Institute of Physics, Federal Research Center-Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Military Academy of the Republic of Belarus, Belarus

Доп.точки доступа:
Loiko, V. A.; Konkolovich, A. V.; Miskevich, A. A.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
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Lyapina, A. A.
Bound states with orbital angular momentum in the continuum of cylindrical non-axisymmetric waveguide / A. A. Lyapina, A. S. Pilipchuk, A. F. Sadreev // Ann. Phys. - 2018. - Vol. 396. - P. 56-70, DOI 10.1016/j.aop.2018.05.020. - Cited References: 28. - This work has been supported by RFBR Grant 17-02-00440 . We thank D.N. Maksimov for discussions. . - ISSN 0003-4916
Кл.слова (ненормированные):
Acoustic wave transmission -- Spinning trapped modes with orbital angular momentum
Аннотация: We consider acoustic wave transmission in a non-axisymmetric waveguide which consists of a cylindrical resonator of radius R and length L and two cylindrical waveguides of radius r
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Держатели документа:
Kirensky Institute of Physics, Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Ляпина, Алина Андреевна
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Bulgakov, E. N.
Optical response induced by bound states in the continuum in arrays of dielectric spheres / E. N. Bulgakov, D. N. Maksimov // J. Opt. Soc. Am. B. - 2018. - Vol. 35, Is. 10. - P. 2443-2452, DOI 10.1364/JOSAB.35.002443. - Cited References: 51. - Ministry of Education and Science of the Russian Federation (Minobrnauka) (State Contract N 3.1845.2017); Russian Foundation for Basic Research (RFBR) (16-02-00314). . - ISSN 0740-3224. - ISSN 1520-8540

РУБ Optics
Рубрики:
COUPLED-MODE THEORY
   LIGHT LINE
   ENHANCEMENT
   TRANSMISSION
   TRANSITION
Аннотация: We consider an optical response induced by bound states in the continuum (BICs) in arrays of dielectric spheres. By combining the quasi-mode expansion technique with coupled mode theory (CMT), we put forward a theory of the optical response by high-Q resonance surrounding BICs in momentum space. The central results are analytical expressions for the CMT parameters, which can be easily calculated from the eigenfrequencies and eigenvectors of the interaction matrix of the scattering systems. The results obtained are verified in comparison against exact numerical solutions to demonstrate that the CMT approximation is capable of reproducing Fano features in the spectral vicinity of the BIC. Based on the quasi-mode expansion technique, we derived the asymptotic scaling law for the CMT parameters in the vicinity of the Γ-point. It is rigorously demonstrated that the linewidth in the CMT approximation exhibits different asymptotic behavior depending on the symmetry of the BIC.

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Держатели документа:
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; Ministry of Education and Science of the Russian Federation (Minobrnauka) [N 3.1845.2017]; Russian Foundation for Basic Research (RFBR) [16-02-00314]
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Coupled chiral optical Tamm states in cholesteric liquid crystals / M. V. Pyatnov [et al.] // Photonics. - 2018. - Vol. 5, Is. 4. - Ст. 30, DOI 10.3390/photonics5040030. - Cited References: 38. - This research was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund, to the research Project Nos. 17-42-240464 and 18-42-243025. . - ISSN 2304-6732
Кл.слова (ненормированные):
Cholesteric liquid crystal -- Optical Tamm states -- Localization -- Transmission spectrum -- Optical devices
Аннотация: The modes formed by two coupled chiral optical Tamm states localized at the interfaces between a photonic cholesteric liquid crystal conjugated with polarization-preserving anisotropic mirrors have been analytically and numerically investigated. These modes are only excited at the diffracting polarization of incident light. As the cholesteric layer thickness decreases, the spectral splitting of the localized state frequency is predicted. The splitting value depends on the crystal layer thickness. At the nondiffracting circular polarization, the localized modes are not excited, and the system becomes similar to the Fabry-Perot cavity containing an anisotropic helical structure.

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Держатели документа:
Siberian Federal University, Institute of Engineering Physics and Radio Electronics, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center, 'Krasnoyarsk Scientific Center, RussianAcademy of Sciences, Siberian Branch', Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pyatnov, M. V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Rudakova, N. V.
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Pankin, P. S.
Tunable hybrid Tamm-microcavity states / P. S. Pankin, S. Y.A. Vetrov, I. V. Timofeev // J. Opt. Soc. Am. B. - 2017. - Vol. 34, Is. 12. - P. 2633-2639, DOI 10.1364/JOSAB.34.002633. - Cited References: 50. - Russian Foundation for Basic Research (RFBR), Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund (17-42-240464); Scholarship of the President of the Russian Federation (SP-227.2016.5). P. S. P. acknowledges the support of the Scholarship of the President of the Russian Federation. The authors thank D. N. Gulkin and V. O. Bessonov for help and fruitful discussions. . - ISSN 0740-3224
Кл.слова (ненормированные):
1-D photonic crystal -- Effect of temperature -- External electric field -- High sensitivity -- Isotropic state -- Microcavity modes -- Silver layer -- Transmission spectrums
Аннотация: Spectral manifestations of hybrid Tamm-microcavity modes in a 1D photonic crystal bounded with a silver layer and containing a nematic liquid crystal microcavity layer have been studied using numerical simulation. It is demonstrated that the hybrid modes can be effectively tuned owing to the high sensitivity of the liquid crystal to the temperature and external electric field variations. It is established that the effect of temperature on the transmission spectrum of the investigated structure is most pronounced at the point of the phase transition of the liquid crystal to the isotropic state, where the refractive index jump is observed.

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Держатели документа:
FRC KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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Volochaev, M. N.
Lorentz microscopy methods for magnetic domain structure study / M. N. Volochaev, L. I. Kveglis, Y. Y. Loginov // IOP Conf. Ser.: Mater. Sci. Eng. - 2017. - Vol. 255, Is. 1. - Ст. 012015, DOI 10.1088/1757-899X/255/1/012015. - Cited References: 12. - This research was supported by Fırat University Scientific Research Projects Unit MF.13.02). Authors acknowledge to Kemerli Firm (Turkey) for their material supports.
Кл.слова (ненормированные):
High resolution transmission electron microscopy -- Magnetic domains -- Magnetic structure -- Transmission electron microscopy
Аннотация: The capabilities of transmission electron microscope Hitachi HT7700 for magnetic domain structure (MDS) study of thin films using Lorentz transmission electron microscopy (LTEM) methods is discussed. Two methods of magnetic domain structure study (defocus method and aperture shift method, including low-angle electron diffraction (LAED)) in thin magnetic films were examined.

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Доп.точки доступа:
Kveglis, L. I.; Loginov, Yu. Yu.; Волочаев, Михаил Николаевич; International Scientific Conference Reshetnev Readings(20 ; 2016 ; Nov. 9-12 ; Krasnoyarsk)
}
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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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Model to describe light scattering by polymer film containing droplets with inhomogeneous anchoring of liquid crystal molecules at the polymer-droplet interface: asymmetry effect in the angular distribution of light / A. V. Konkolovich [et al.] // Liq. Cryst. - 2019. - Vol. 46, Is. 9. - P. 1415-1427, DOI 10.1080/02678292.2019.1573331. - Cited References: 67. - The work was performed in the framework of an agreement on inter-academic cooperation between the National Academy of Sciences of Belarus and the SB RAS. It is supported by the Belarusian Republican Foundation for Fundamental Research (Project No. F18RA-003). MN Krakhalev thanks the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory and the Krasnoyarsk Regional Science Foundation (grant No. 18-42-243006). . - ISSN 0267-8292. - ISSN 1366-5855

РУБ Chemistry, Multidisciplinary + Crystallography + Materials Science, Multidisciplinary
Рубрики:
IONIC MODIFICATION
NEMATIC DROPLETS
COHERENT TRANSMITTANCE
Кл.слова (ненормированные):
Polymer-dispersed liquid crystal film -- liquid crystal droplets -- light transmission -- angular distribution of scattered light
Аннотация: A model to describe light scattering by polymer film containing of monolayer of liquid crystal droplets with inhomogeneous anchoring of liquid crystal molecules at the polymer-droplet interface is developed. It is based on the interference approximation of the wave scattering theory. The director field distribution in the droplet volume is determined by solving the free energy density minimization problem using the relaxation method. The spatial distribution of droplets in the layer is described by the hard disks model. The amplitude scattering matrices of individual droplets are found in the anomalous diffraction approximation. The algorithm for numerical analysis of the characteristics of light scattered in a polymer film containing droplets at homogeneous and inhomogeneous surface anchoring is described in terms of the partial filling factors of the monolayer film. Electrically controllable symmetry breaking effect of angular distribution of light scattered by films containing droplets with inhomogeneous anchoring at the polymer-droplet interface is described and experimentally confirmed.

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Держатели документа:
Natl Acad Sci Belarus, Stepanov Inst Phys, Minsk, BELARUS.
Russian Acad Sci, Fed Res Ctr, Krasnoyarsk Sci Ctr, Siberian Branch,Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk, Russia.

Доп.точки доступа:
Konkolovich, A. V.; Miskevich, A. A.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Loiko, V. A.; Belarusian Republican Foundation for Fundamental Research [F18RA-003]; Krasnoyarsk Regional Science Foundation [18-42-243006]
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10.

    Aksenov, S. V.
    Collapse of the Fano resonance caused by the nonlocality of the majorana state / S. V. Aksenov, M. Y. Kagan // JETP Letters. - 2020. - Vol. 111, Is. 5. - P. 286-292, DOI 10.1134/S0021364020050057. - Cited References: 37. - The work was supported by the Presidium of the Russian Academy of Sciences (Program of Basic Research no. 32 "Nanostructures: Physics, Chemistry, Biology, and Fundamentals of Technologies"), by the Russian Foundation for Basic Research (project nos. 19-02-00348, 20-32-70059, and 20-02-00015), and by the Government of the Krasnoyarsk Territory together with the Krasnoyarsk Science Foundation (project no. 19-42-240011 "Coulomb Interactions in the Problem of Majorana Modes in Low-Dimensional Systems with Nontrivial Topology"). S.V. Aksenov acknowledges the support of the Council of the President of the Russian Federation for Support of Young Russian Scientists and Leading Scientific Schools, grant no. MK3722.2018.2. M.Yu. Kagan acknowledges the support of the National Research University Higher School of Economics (program of basic research). . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
BOUND-STATES
   QUANTUM TRANSITIONS
   TRANSMISSION
   CONTINUUM
   CASCADE
Аннотация: Owing to the nonlocal character of the Majorana state, the corresponding excitations are of great interest. It is demonstrated that the direct consequence of such nonlocality is the collapse of the Fano resonance manifesting itself in the conductance of an asymmetric interference device, the arms of which are connected by a one-dimensional topological superconductor. In the framework of the spinless model, it is shown that the predicted effect is associated with an increase in the multiplicity of the degeneracy of the zero-energy state of the structure arising at the critical point of the Kitaev model. Such an increase leads to the formation of a bound state in the continuum.

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Публикация на русском языке Аксенов, Сергей Владимирович. Коллапс резонанса Фано вследствие нелокальности майорановского состояния [Текст] / С. В. Аксенов, М. Ю. Каган // Письма в ЖЭТФ. - 2020. - Т. 111 Вып. 5. - С. 321-327

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk 660036, Russia.
Natl Res Univ Higher Sch Econom, Moscow 101000, Russia.
Russian Acad Sci, Kapitza Inst Phys Problems, Moscow 119334, Russia.

Доп.точки доступа:
Kagan, M. Yu.; Аксенов, Сергей Владимирович; Presidium of the Russian Academy of SciencesRussian Academy of Sciences [32]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-02-00348, 20-32-70059, 20-02-00015]; Krasnoyarsk Science Foundation [19-42-240011]; Government of the Krasnoyarsk Territory; Council of the President of the Russian Federation for Support of Young Russian Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK3722.2018.2]; National Research University Higher School of Economics
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11.

Belyaev, B. A.
Study of an Electromagnetic Wave Transmission Line Based on Coupled Dielectric Resonators / B. A. Belyaev, K. V. Lemberg, V. F. Shabanov // Dokl. Phys. - 2019. - Vol. 64, Is. 11. - P. 409-413, DOI 10.1134/S1028335819110053. - Cited References: 7. - This study was supported by the Ministry of Science and Higher Education, project no. RFMEFI60417X0179. . - ISSN 1028-3358. - ISSN 1562-6903
Кл.слова (ненормированные):
waveguide -- plasmon resonance -- electromagnetically coupled resonators
Аннотация: An analog of an optical waveguide in the form of a chain of metallic nanoparticles has been investigated using modified cylindrical dielectric resonators in the microwave band. Similar to the plasma oscillations in spherical nanoparticles, the two lowest resonances of the dielectric resonator correspond to the dipole and quadrupole oscillatory modes. It is shown that a waveguide consisting of seven resonators exhibits high frequency selective properties and relatively low loss if the resonances of the quadrupole oscillatory modes are used to form its passband. The characteristics of the investigated waveguide remain almost unchanged at its bending by 90°, and the cross section of localization of the main part of the energy propagating in the waveguide is smaller than the electromagnetic wavelength by a factor of five, which approximately corresponds to the optical waveguides based on plasma oscillations in nanoparticles.

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Публикация на русском языке Беляев, Борис Афанасьевич. Исследование линии передачи электромагнитных волн на связанных диэлектрических резонаторах [Текст] / Б. А. Беляев, К. В. Лемберг, В. Ф. Шабанов // Доклады Академии наук. - 2019. - Т. 489 № 3. - С. 240-245

Держатели документа:
Kirenskii Institute of Physics, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, 660014, Krasnoyarsk, Russia

Доп.точки доступа:
Lemberg, K. V.; Лемберг, Константин Вячеславович; Shabanov, V. F.; Шабанов, Василий Филиппович; Беляев, Борис Афанасьевич
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12.

    Паршин, Александр Михайлович.
    Оптическое пропускание доменной структуры нематика на поверхности полимера в магнитном поле / А. М. Паршин, А. В. Баранник // Жидк. кристаллы и их практич. использ. - 2020. - Т. 20, Вып. 2. - С. 62-68 ; Liq. Cryst. Appl., DOI 10.18083/LCAppl.2020.2.62. - Библиогр.: 20 . - ISSN 1991-3966
   Перевод заглавия: Optical transmission of the nematic domain structure on the polymer surface in a magnetic field

РУБ Crystallography
Рубрики:
LIGHT-SCATTERING
DEFECTS
Кл.слова (ненормированные):
нематический жидкий кристалл -- поликарбонат -- доменная структура -- интерференция света -- рассеяние света -- магнитное поле -- nematic liquid crystal -- polycarbonate -- domain structure -- light -- interference -- light scattering -- magnetic field
Аннотация: Исследовано распространение лазерного луча через слой гибридно-упорядоченного нематика с поверхностной линией дисклинации, состоящий из доменов с радиальной конфигурацией нематического директора на пленке поликарбоната. Ориентационная структура в объеме домена трансформируется в планарную одноосную, задаваемую линией дисклинации, либо в гомеотропную под действием магнитного поля. Получена зависимость интенсивности света, прошедшего через слой, от магнитного поля, прикладываемого перпендикулярно поверхности полимера. Оптическое пропускание сопровождалось интерференционными минимумами и максимумами. Представлена модель интерференции света, основанная на двулучепреломлении, учитывающая рассеяние на ориентационно-структурных неоднородностях доменного ансамбля. Из рассмотрения свободной энергии жидкого кристалла и эффектов двулучепреломления выведено аналитическое выражение, устанавливающее зависимость между интенсивностью света и напряженностью магнитного поля, совпадающее с экспериментом.
The propagation of a laser beam through a layer of a hybrid ordered nematic on a polycarbonate film is studied. The nematic has a surface disclination line consisting of domains with a radial configuration of the nematic director. The orientational structure in the domain volume can be transformed into a planar uniaxial structure defined by a disclination line or into a homeotropic one under the influence of a magnetic field. The dependence of the light intensity transmitted through the layer on the magnetic field applied perpendicular to the polymer surface is obtained. Optical transmission was accompanied by interference minima and maxima. Light interference model based on birefringence which takes into account scattering by the orientation-structural inhomogeneities of the domain ensemble is presented. Considering the analysis of the liquid crystal free energy and the birefringence effects, an analytical expression is derived. It establishes the relationship between the light intensity and the magnetic field strength, which coincides with the experiment.

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Держатели документа:
Институт физики им. Л. В. Киренского, Федеральный исследовательский центр «Красноярский научный центр Сибирского отделения Российской академии наук», Академгородок, д. 50, 660036 Красноярск, Россия
Сибирский федеральный университет, пр. Свободный, 79, 660041 Красноярск, Россия

Доп.точки доступа:
Баранник, Алексей Владимирович; Barannik, A. V.; Parshin, A. M.

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13.

Features of large-scale thin foils fabrication for transmission electron microscopy by focused ion beam / M. N. Volochaev, M. S. Shcheglova, Yu. Yu. Balashov, Yu. Yu. Loginov // IOP Conf. Ser.: Mater. Sci. Eng. - 2020. - Vol. 822, Is. 1. - Ст. 012028DOI 10.1088/1757-899X/822/1/012028. - Cited References: 7
Аннотация: Focused ion beam (FIB) sample preparation for transmission electron microscopy is a well established technique. However there are some problems related with high-quality large-scale (over 10 um) sample preparation of thin foils. In this work we demonstrate the successful preparation of such samples on example of ferrite steel sample and present the refined lift-out preparation technique, which was applied here. All sample preparation has been carried out in conventional single-beam FIB Hitachi FB-2100 with additional low-kV Ar+ ion polishing.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Volochaev, M. N.; Волочаев, Михаил Николаевич; Shcheglova, M. S.; Balashov, Yu. Yu.; Балашов, Юрий Юрьевич; Loginov, Yu. Yu.; International Scientific Conference on Reshetnev Readings 2018(22nd ; 11 - 15 November 2018 ; Krasnoyarsk, Russian Federation)
}
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14.

Experimental observation of symmetry protected bound state in the radiation continuum in the periodic array of ceramic disks / A. A. Bogdanov [et al.] // J. Phys. Conf. Ser. : IOP, 2018. - Vol. 1124: 5th International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures, Saint Petersburg OPEN 2018 (2 April 2018 through 5 April 2018, ) Conference code: 144220, Is. 5. - Ст. 051057, DOI 10.1088/1742-6596/1124/5/051057. - Cited References: 3. - This work was supported by the Russian Foundation for Basic Research (16-37-60064, 17-02-01234), the Ministry of Education and Science of the Russian Federation (3.1668.2017/4.6), the President of Russian Federation (MK-403.2018.2).
Кл.слова (ненормированные):
Ceramic disks -- Field profile -- GHz frequencies -- Material loss -- Periodic arrays -- Quadratic growth -- Resonant state -- Transmission spectrums
Аннотация: We observe experimentally symmetry protected bound states in the continuum (BICs) in the stack of ceramic disks. We analyze transformation of the resonant state into BIC with increasing of the number of disks theoretically and experimentally. In the experiment we measure the transmission spectra through the array of ceramic disks at GHz frequencies. We observe a quadratic growth of the Q-factor of quasi-BIC with the number of disks due to material losses. We cross-check the observation of BIC in the transmission spectra by measurement of the field profiles which are a good agreement with the results of the numerical simulations. © Published under licence by IOP Publishing Ltd.

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Держатели документа:
Department of Photonics and Metamateials, ITMO University, St.Petersburg, 197101, Russian Federation
Ioffe Institute, St. Petersburg, 194021, Russian Federation
St.Petersburg Academic University, Khlopina 8/3, St.-Petersburg, 194021, Russian Federation
Giricond Research Institute, Ceramics Co. Ltd., Saint Petersburg, 194223, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Bogdanov, A. A.; Balezin, M.; Kapitanova, P. V.; Sadrieva, Z.; Belyakov, M. A.; Nenasheva, E. A.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures(5 ; 2008 ; 2 - 5 April ; Saint Petersburg)
}
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15.

    Polarization, transmission, and small-angle scattering of light by a polymer film with elongated droplets of nematic liquid crystal / V. A. Loiko [et al.] // J. Quant. Spectrosc. Radiat. Transf. - 2019. - Vol. 229. - P. 130-144, DOI 10.1016/j.jqsrt.2019.03.006. - Cited References: 29. - The work was performed in the framework of an agreement on inter-academic cooperation between the National Academy of Sciences of Belarus and the Siberian Branch of the Russian Academy of Sciences and supported by the Belarusian Republican Foundation for Fundamental Research (project no. F18RA-003 ). M.N. Krakhalev thanks the Russian Foundation for Basic Research and Government of Krasnoyarsk Territory , Krasnoyarsk Regional Fund of Science, grant no. 18-42-243006. . - ISSN 0022-4073
   Перевод заглавия: Поляризация, пропускание и малоугловое рассеяние света полимерной пленкой с вытянутыми каплями нематического жидкого кристалла
Кл.слова (ненормированные):
Polarization -- Polymer-dispersed liquid crystal -- Uniaxially stretched film -- Liquid crystal droplet -- Light transmittance -- Light scattering anisotropy
Аннотация: An optical-mechanical model has been developed to describe the transmittance, polarization and small-angle distribution of light scattered by an uniaxially-stretched polymer film containing the elongated ellipsoidal droplets of nematic liquid crystal. It is based on the approximations of Foldy-Twersky, anomalous diffraction, and single scattering. The spectral dependences of transmittances and polarizing abilities of the polymer dispersed liquid crystal films have been analyzed as well as the small-angle intensity distribution and the polarization degree of scattered light depending on the film thicknesses, refractive index of polymer matrix, sizes of droplets, their anisometry parameters, concentration, polydispersity, and optical axes orientation. The optical characteristics of films with homogeneous and inhomogeneous interfacial anchoring at the surface of liquid crystal droplets have been considered. The transmittance and polarizing ability of the films have been studied as functions of the angular aperture of the system recording scattered light. © 2019 Elsevier Ltd

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Держатели документа:
Stepanov Institute of Physics, National Academy of Sciences of Belarus, Niezalezhnastsi avenue 68-2, Minsk, 220072, Belarus
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center”, Siberian Branch, Russian Academy of Sciences, Academgorodok 50(38), Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Loiko, V. A.; Konkolovich, A. V.; Miskevich, A. A.; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
}
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16.

Polymer films with elongated droplets of nematic liquid crystal: light transmission, scattering, and polarization / V. A. Loiko [et al.] // 15th Eur. Conf. Liq. Cryst. (ECLC) : conf. progr. - 2019. - Ст. H2-O-31. - Cited References: 3

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Доп.точки доступа:
Loiko, V. A.; Konkolovich, A. V.; Miskevich, A. A.; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; European Conference on Liquid Crystals(15 ; 2019 ; June 30 - July 5 ; Wroclaw, Poland)
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17.

Magnetic Properties of Ultrafine ε-Fe2O3 Nanoparticles in a Silicon Xerogel Matrix / Y. V. Knyazev [et al.] // Bull. Russ. Acad. Sci. Phys. - 2019. - Vol. 83, Is. 7. - P. 875-877, DOI 10.3103/S1062873819070219. - Cited References: 11 . - ISSN 1062-8738
Кл.слова (ненормированные):
Hematite -- High resolution transmission electron microscopy -- Magnetic properties -- Nanoparticles -- Silica -- Silicon -- Silicon oxides -- Xerogels
Аннотация: A new metamaterial is obtained on the basis of ε-Fe2O3 nanoparticles immobilized in a xerogel matrix. Samples are synthesized by impregnating SiO2 hydrogel with iron (II) salts with subsequent drying and calcination. The structure and magnetic properties of the composites are probed using transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy, and static magnetic measurements. © 2019, Allerton Press, Inc.

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Публикация на русском языке

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Yakushkin, S. S.; Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Kirillov, V. L.; Martyanov, O. N.
}
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18.

Spectral polarization of transmission radiation by uniaxially stretched polymer-dispersed liquid crystal films with modified interphase surface anchoring / A. V. Konkolovich [et al.] // 14th Eur. Conf. Liq. Cryst. (ECLC) : conf. programme / чл. нац. орг. и прогр. ком. V. Ya. Zyryanov. - 2017. - Ст. P151. - Библиогр.: 3 . - Poster

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Доп.точки доступа:
Zyryanov, V. Ya. \чл. нац. орг. и прогр. ком.\; Зырянов, Виктор Яковлевич; Konkolovich, A. V.; Zyryanov, V. Ya.; Miskevich, A. A.; Loiko, V. A.; European Conference on Liquid Crystals(14 ; 2017 ; June ; 25-30 ; Moscow); Московский государственный университет им. М.В. Ломоносова
}
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19.

Bulgakov, E. N.
Current-voltage characteristics of the resonant tunnelling double-barrier structure under time-periodical perturbation / E. N. Bulgakov, A. F. Sadreev // J. Phys.: Condens. Matter. - 1996. - Vol. 8, Is. 45. - P. 8869-8887, DOI 10.1088/0953-8984/8/45/020. - Cited References: 38 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
SEMICONDUCTOR DOUBLE-BARRIER
   OSCILLATING QUANTUM-WELL
   DEPENDENT TRANSPORT
   INFRARED-RADIATION
   TUNNELING TIMES
   HETEROSTRUCTURES
   TRANSMISSION
   MODEL
   FREQUENCIES
   COHERENT
Аннотация: We consider a typical semiconductor resonant tunnelling GaAs/AlGaAs/GaAs nanostructure which forms a double-barrier potential with quasienergy levels corresponding to transition frequencies in the infrared and microwave regions. Two types of dynamical perturbation of the heterostructure in the form V-1(x, t) = V(1)x cos Omega t and V-2(t) = V-2 cos Omega t are considered. We analyse numerically a reconstruction of the electron transmission through the heterostructure and the current-voltage characteristics (IVC) under the influence of these dynamical perturbations. Both weak and strong perturbations are considered. We investigate the dependences of the transmission on the electron energy and the frequency of the external field with the main accent on the case where a frequency of the perturbation is tuned to a transition between quasienergies of the double-barrier structure. it is found that these resonant phenomena give rise to new peaks and dips in the IVC. In particular, it is shown that the dipole type of perturbation V-1(x, t) gives rise to a Rabi splitting of the transmission peaks and under certain conditions to a Rabi splining of the IVC peaks and dips. We demonstrate that dynamical perturbation may induce a direct current opposite to the direction of the applied voltage, and that this phenomenon takes the form of a sharp dip which has a resonant origin. It is observed that the dipole type of perturbation V-1(x, t) of laser radiation is more effective for tuning the IVC than the first perturbation V-2(t). Also absorption and emission of energy by an electron transmitted through the DBRTS are considered.

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

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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20.

BULGAKOV, E. N.
MESOSCOPIC RING UNDER THE INFLUENCE OF TIME-PERIODICAL FLUX - AHARONOV-BOHM OSCILLATIONS AND TRANSMISSION OF WAVE-PACKETS / E. N. BULGAKOV, A. F. SADREEV // Phys. Rev. B. - 1995. - Vol. 52, Is. 16. - P. 11938-11944, DOI 10.1103/PhysRevB.52.11938. - Cited References: 25 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
QUANTUM OSCILLATIONS
NETWORKS
TRANSPORT
Аннотация: The Aharonov-Bohm oscillations in the transmission probability of a one-dimensional mesoscopic ring between two electrodes are considered numerically where a time-periodical flux gamma(t)=gamma+lambda cos omega t is applied. Such a flux simulates a phase-coherent inelastic scattering due to the absorption/emission processes of modulation quanta. An increase of alternating flux amplitude lambda drastically changes the Aharonov-Bohm oscillations of the transmission though the exact period remains phi(0)=hc/e. A frequency dependence of the transmission has abrupt steps at omega=(E-E(F))/n, caused by the locking of the transmission in the nth channel where EF is the Fermi level. Moreover, for transmission of a narrow wave packet the time-periodical flux gives rise to two effects. The first is a fractioning of the input wave packet by the ring in such a way that the output wave function consists of a few separate wave packets. Their number, distance apart, and height essentially depend on the static flux gamma. The second effect is a strong space squeezing of the output wave packet.

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Держатели документа:
L. V. Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
SADREEV, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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