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    Узкие резонансы в периодических структурах на основе термостойкого нитрида титана / В. И. Закомирный, В. С. Герасимов [и др.] // Решетневские чтения : [Электронный ресурс] : материалы XXI Междунар. науч.-практич. конф., посвящ. памяти ген. конструктора ракет.-космич. систем акад. М. Ф. Решетнева : в 2-х ч. : электронное издание. - Красноярск : СибГУим. М. Ф. Решетнева, 2017. - Ч. 1. - С. 609-611. - Библиогр.: 6
   Перевод заглавия: Narrow resonances in periodic structures based on refractory titanium nitride
Аннотация: Исследованы возможности применения нитрида титана (TiN) для получения высокодобротного поверхностного резонанса на периодической структуре сферических наночастиц. Полученные данные открывают перспективы для использования 2D массивовиз TiN наночастиц в качестве элементов оптических интегральных микросхем нового поколения.

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Держатели документа:
Сибирский федеральный университет 660041 Красноярск, проспект Свободный, 79
Институт вычислительного моделирования СО РАН
Королевский технологический институт, Швеция
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Закомирный, Вадим Игоревич; Герасимов, Валерий Сергеевич; Gerasimov, V. S.; Ершов, Александр Евгеньевич; Ershov, A. E.; Карпов, Сергей Васильевич; Karpov, S.V.; "Решетневские чтения", международная научно-практическая конференция(21 ; 2017 ; нояб. ; 8-11 ; Красноярск); Сибирский государственный университет науки и технологий им. акад. М. Ф. Решетнева; Информационные спутниковые системы им. академика М. Ф. Решетнева, АО; Красноярский машиностроительный завод, ОАО
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    Коллективные решеточные резонансы в диэлектрических наноструктурах при наклонных падениях оптического излучения / А. Д. Утюшев, А. Е. Ершов [и др.] // Решетневские чтения : [Электронный ресурс] : материалы XXIV Междунар. науч.-практич. конф., посвящ. памяти ген. конструктора ракет.-космич. систем акад. М. Ф. Решетнева : в 2-х ч. : электронное издание. - Красноярск : СибГУим. М. Ф. Решетнева, 2020. - Ч. 1. - С. 458-460. - Библиогр.: 2. - Работа поддержана Министерством науки и высшего образования Российской Федерации, проект номер ФСРЗ-2020-008.
   Перевод заглавия: Collective lattice resonances dielectric nanostructures at different angles of incidence radiation
Аннотация: Тонкие нанокомпозитные ZnO/SWCNTs пленки были синтезированы с помощью вакуумной фильтрации и атомно-слоевого осаждения. Были измерены вольт-амперные характеристики образцов пленок. Наосновевольт-амперных характеристик было рассчитано электрическое сопротивление для нанокомпозитных ZnO/ОУНТ пленок.

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Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Утюшев, А. Д.; Ершов, Александр Евгеньевич; Ershov, A. E.; Герасимов, Валерий Сергеевич; Gerasimov, V. S.; Закомирный, Вадим Игоревич; Карпов, Сергей Васильевич; Karpov, S.V.; "Решетневские чтения", международная научно-практическая конференция(24 ; 2020 ; нояб. ; 10-13 ; Красноярск); Сибирский государственный университет науки и технологий им. акад. М. Ф. Решетнева; Информационные спутниковые системы им. академика М. Ф. Решетнева, АО; Красноярский машиностроительный завод, ОАО
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Zobov, V. E.
Effect of intramolecular interaction on time growth of second moment of multiple quantum NMR in solids / V. E. Zobov, A. A. Lundin // INTERNATIONAL CONFERENCE ON RESONANCES IN CONDENSED MATTER: ALTSHULER100. Ser. Journal of Physics Conference Series : IOP PUBLISHING LTD, 2011. - Vol. 324: International Conference on Resonances in Condensed Matter (JUN 21-25, 2011, Kazan, RUSSIA). - Ст. 12010, DOI 10.1088/1742-6596/324/1/012010. - Cited References: 12 . - ISBN 1742-6588

РУБ Physics, Condensed Matter
Рубрики:
COHERENCES
DYNAMICS
Кл.слова (ненормированные):
Dipole dipole interactions -- Double-quantum -- Intramolecular interactions -- Multiple quantum NMR -- Nuclear spin system -- Quantum spectrum -- Rate increase -- Second moments -- Solids containing methyl groups -- Time dependence -- Functional groups -- Quantum optics -- Solids -- Spin dynamics -- Hamiltonians
Аннотация: The time dependence of the NMR multiple quantum spectrum in solids containing methyl groups is investigated. We studied both of types of the nuclear spin systems: namely linking by secular part of the mutual dipole-dipole interaction and linking by effective double quantum Hamiltonian. It is revealed for the first type of systems the rate with the time of the growing up of the second moment when intramolecular interaction is present becomes less in compare with situation when a strong intramolecular interaction is absent. On the contrary for the second type of Hamiltonian the above rate increases.

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[Zobov, V. E.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russian Federation
N.N. Semenov Institute of Chemical Physics, RAS, 117977, Moscow, Russian Federation

Доп.точки доступа:
Lundin, A. A.; Зобов, Владимир Евгеньевич
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Wannier-Stark resonances in semiconductor superlattices / M. . Gluck [et al.] // Phys. Rev. B. - 2002. - Vol. 65, Is. 11. - Ст. 115302, DOI 10.1103/PhysRevB.65.115302. - Cited References: 22 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
ELECTRIC-FIELD
   STATES
   LADDERS
   BREAKDOWN
   BLOCH
   LOCALIZATION
Аннотация: Wannier-Stark states for semiconductor superlattices in strong static fields, where the interband Landau-Zener tunneling cannot be neglected, are rigorously calculated. The lifetime of these metastable states was found to show multiscale oscillations as a function of the static field, which is explained by an interaction with above-barrier resonances. An equation, expressing the absorption spectrum of semiconductor superlattices in terms of the resonance Wannier-Stark states, is obtained and used to calculate the absorption spectrum in the region of high static fields.

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Держатели документа:
Univ Kaiserslautern, Fachbereich Phys, D-67653 Kaiserslautern, Germany
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Gluck, M.; Kolovsky, A. R.; Коловский, Андрей Радиевич; Korsch, H. J.; Zimmer, F.
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Vazhenina, I. G.
Spin−wave resonance as a way of studying the constant of surface anisotropy, using films of Fe–Ni alloy as an example / I. G. Vazhenina, L. A. Chekanova, R. S. Iskhakov // Bull. Russ. Acad. Sci. Phys. - 2017. - Vol. 81, Is. 3. - P. 308-310, DOI 10.3103/S1062873817030388. - Cited References: 13 . - ISSN 1062-8738
Кл.слова (ненормированные):
Anisotropy -- Deposition -- Ferromagnetic materials -- Film thickness -- Nickel -- Chemical deposition -- Ferromagnetic thin films -- Ni alloys -- Ni thin films -- Surface anisotropy -- Wave resonances -- Thin films
Аннотация: The effect the thickness and concentration composition of a ferromagnetic thin film have on surface anisotropy constant KS is investigated. Spin–wave resonance is chosen as a way of detecting and measuring the KS value. Fe–Ni thin films are synthesized via chemical deposition. Dependences of KS on the content of Ni in the alloy and a film’s thickness are established. © 2017, Allerton Press, Inc.

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Публикация на русском языке Важенина, Ирина Георгиевна. Спин-волновой резонанс как метод исследования константы поверхностной анизотропии на примере пленок Fe–Ni-сплава [Текст] / И. Г. Важенина, Л. А. Чеканова, Р. С. Исхаков // Изв. РАН. Сер. физич. - 2017. - Т. 81 № 3. - С. 337-339

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

Доп.точки доступа:
Chekanova, L. A.; Чеканова, Лидия Александровна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Важенина, Ирина Георгиевна
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Ultra-narrow surface lattice resonances in periodic structures of refractory titanium nitride nanodiscs / V. I. Zakomirnyi [et al.] // 14th Topical Meeting Novel Optical Materials and Applications : program. - 2018. - Polaritonics. - Ст. NOW4J.3. - P. 85
Аннотация: We show that regular arrays of TiN nanodiscs support high-Q surface lattice resonances at telecom range. The obtained data open new prospects for utilization of refractory TiN in new photonics interconnects operating at high temperatures.

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Доп.точки доступа:
Zakomirnyi, V. I.; Rasskazov, I. L.; Рассказов, Илья Леонидович; Gerasimov, V. P.; Герасимов, Виктор Петрович; Ershov, A. E.; Ершов, Александр Евгеньевич; Ågren, H.; Polyutov, S. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Novel Optical Materials and Applications, Topical Meeting(14 ; 2018 ; 2-5 July ; Zürich, Switzerland); OSA Optics and Photonics Congress(2018 ; 2-5 July ; Zürich, Switzerland)
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Timofeev, I. V.
Polarized bound state in the continuum and resonances with tunable Q-factor in an anisotropic photonic crystal / I. V. Timofeev, D. N. Maksimov, A. F. Sadreev // Progress in Electromagnetics Research Symposium : Abstracts. - 2018. - P. 1622. - Cited References: 1
Аннотация: A one-dimensional photonic crystal composed of alternating layers of isotropic and anisotropic dielectric materials is theoretically considered. It is known that such a system has diﬀerent band structures for ordinary and extraordinary waves of diﬀerent polarizations. We demonstrate that if an anisotropic defect layer is inserted into the structure, the crystal can support an extraordinary defect mode with vanishing Q-factor. That mode can be recognized as an optical bound state in the continuum, i.e., a localized eigenmode of Maxwell’s equation embedded into the continuous spectrum of propagating ordinary waves. The exact expressions for the eigenfrequency and mode proﬁle are obtained analytically. By tilting the principle dielectric axes of the defect layer relative to those of the photonic crystal we ﬁnd a long-lived resonance in the transmission spectrum. It is shown that the resonance arises from the bound state in the continuum perturbed by the axes tilt. By using time-dependant perturbation theory we derived an analytical expression for the decay rate of the resonance. In the framework of the coupled mode theory we ﬁnd expressions for transmission/reﬂection spectra in the spectral vicinity of the bound state. The analytical results are found to be in agreement with the numerical data by the Berreman anisotropic transfer matrix approach. An experimental set-up with a liquid crystal defect layer is proposed to tune the Q-factor of the resonance through applying an external electric ﬁeld. We speculate that the set-up provides a simple and robust platform for observing optical bound states in the continuum in the form of resonances with tunable Q-factor.

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Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Тимофеев, Иван Владимирович; Progress in Electromagnetics Research Symposium(40 ; 2018 ; Aug.; 1-4 ; Toyama, Japan)
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Timofeev, I. V.
Polarized bound state in the continuum and resonances with tunable Q-factor in an anisotropic photonic crystal / I. V. Timofeev, D. N. Maksimov, A. F. Sadreev. - Electronic text data // arXiv. - 2017. - Ст. 1710.06575. - Cited References: 44. - This work was partially supported through RFBR grants N17-52-45072, and N17-42-240464. We appreciate discussions with E.N. Bulgakov and K.N. Pichugin.
Аннотация: We consider a one-dimensional photonic crystal composed of alternating layers of isotropic and anisotropic dielectric materials. Such a system has different band structures for different polarizations of light. We demonstrate that if an anisotropic defect layer is inserted into the structure, the crystal can support an optical bound state in the continuum. By tilting the principle dielectric axes of the defect layer relative to those of the photonic crystal we observe a long-lived resonance in the transmission spectrum. We derive an analytical expression for the decay rate of the resonance that agrees well with the numerical data by the Berreman anisotropic transfer matrix approach. An experimental set-up with a liquid crystal defect layer is proposed to tune the Q-factor of the resonance through applying an external electric field. We speculate that the set-up provides a simple and robust platform for observing optical bound states in the continuum in the form of resonances with tunable Q-factor.

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Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Тимофеев, Иван Владимирович
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    Thermal degradation of optical resonances in plasmonic nanoparticles / L. K. Sorensen, D. E. Khrennikov, V. S. Gerasimov [et al.] // Nanoscale. - 2022. - Vol. 14, Is. 2. - P. 433-447, DOI 10.1039/d1nr06444d. - Cited References: 85. - The work is supported by the Russian Science Foundation (project No. 18-13-00363). L. K. S. acknowledges the support of Carl Tryggers Stifetelse, project CTS 18-441. The authors thank the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" for the use of Hitachi S-5500 high-resolution scanning electron microscope for the analysis of nanomaterials. Some of the computations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at the High Performance Computing Center North (HPC2N) partially funded by the Swedish Research Council through grant agree-ment no. SNIC 2020/3-29. Authors thank Anton Utyushev for technical assistance in preparation of Fig. 3 . - ISSN 2040-3364. - ISSN 2040-3372
   Перевод заглавия: Тепловая деградация оптических резонансов в плазмонных наночастицах

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
STABILIZED GOLD NANOPARTICLES
DIPOLE INTERACTION-MODEL
Аннотация: The dependence of plasmon resonance excitations in ultrafine (3-7 nm) gold nanoparticles on heating and melting is investigated. An integrated approach is adopted, where molecular dynamics simulations of the spatial and temporal development of the atoms constituting the nanoparticles generate trajectories out of which system conformations are sampled and extracted for calculations of plasmonic excitation cross sections which then are averaged over the sample configurations for the final result. The calculations of the plasmonic excitations, which take into account the temperature- and size-dependent relaxation of the plasmons, are carried out with a newly developed Extended Discrete Interaction Model (Ex-DIM) and complemented by multilayered Mie theory. The integrated approach clearly demonstrates the conditions for suppression of the plasmons starting at temperatures well below the melting point. We have found a strong inhomogeneous dependence of the atom mobility in the particle crystal lattice increasing from the center to its surface upon the temperature growth. The plasmon resonance suppression is associated with an increase of the mobility and in the amplitude of phonon vibrations of the lattice atoms accompanied by electron-phonon scattering. This leads to an increase in the relaxation constant impeding the plasmon excitation as the major source of the suppression, while the direct contribution from the increase in the lattice constant and its chaotization at melting is found to be minor. Experimental verification of the suppression of surface plasmon resonance is demonstrated for gold nanoparticles on a quartz substrate heated up to the melting temperature and above.

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Держатели документа:
Siberian Fed Univ, Int Res Ctr Spect & Quantum Chem IRC SQC, Krasnoyarsk 660041, Russia.
Royal Inst Technol, Dept Theoret Chem & Biol, SE-10691 Stockholm, Sweden.
Fed Res Ctr KSC SB RAS, Inst Computat Modeling, Krasnoyarsk 660036, Russia.
Fed Res Ctr KSC SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Inst Chem Organometall Cpds, CNR ICCOM, Via G Moruzzi 1, I-56124 Pisa, Italy.
Fed Siberian Res Clin Ctr FMBA Russia, Kolomenskaya 26, Krasnoyarsk 660037, Russia.
Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.

Доп.точки доступа:
Sorensen, Lasse K.; Khrennikov, Daniil E.; Gerasimov, Valeriy S.; Ershov, Alexander E.; Vysotin, M. A.; Высотин, Максим Александрович; Monti, Susanna; Zakomirnyi, Vadim, I; Polyutov, Sergey P.; Agren, Hans; Karpov, S. V.; Карпов, Сергей Васильевич; Russian Science FoundationRussian Science Foundation (RSF) [18-13-00363]; Carl Tryggers Stifetelse [CTS 18-441]; Swedish Research CouncilSwedish Research CouncilEuropean Commission [SNIC 2020/3-29]
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10.

    The ferromagnetic and spin-wave resonances in multilayer nanogranular films [Co40Fe40B20)X(SiO2)100-X /a-Si:H]n / E. A. Denisova [et al.] // 20th Int. Conf. on Magnetism (ICM-2015) : book of abstracts. - 2015. - Ст. Mo.H-P38
   Перевод заглавия: Ферромагнитный и спин-волновой резонансы в мультислойных наногранулированных пленках [Co40Fe40B20)X(SiO2)100-X /a-Si:H]n

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Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Kalinin, Yu. E.; Калинин, Ю. Е.; Sitnikov, A. V.; Ситников, Александр Викторович; International Conference on Magnetism(20 ; 2015 ; Jul ; 5-10 ; Barselona, Spain)
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11.

Surface plasmon resonances in liquid metal nanoparticles / A. E. Ershov [et al.] // Appl. Phys. B. - 2017. - Vol. 123, Is. 6. - Ст. 182, DOI 10.1007/s00340-017-6755-2. - This work was performed within the State contract of the RF Ministry of Education and Science for Siberian Federal University for scientifc research in 2017–2019. The numerical calculations were performed using the MVS-1000 M cluster at the Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences. . - ISSN 0946-2171
Кл.слова (ненормированные):
Aggregates -- Dimers -- Gold -- Liquids -- Metal nanoparticles -- Nanoparticles -- Nonlinear optics -- Silver -- Surface plasmon resonance -- Au nanoparticle -- Colloidal aggregates -- Experimental values -- Experimental verification -- Metallic nanoparticles -- Nonlinear optical response -- Plasmonic nanoparticle -- Surface plasmon frequency -- Plasmons
Аннотация: We have shown significant suppression of resonant properties of metallic nanoparticles at the surface plasmon frequency during the phase transition “solid–liquid” in the basic materials of nanoplasmonics (Ag, Au). Using experimental values of the optical constants of liquid and solid metals, we have calculated nanoparticle plasmonic absorption spectra. The effect was demonstrated for single particles, dimers and trimers, as well as for the large multiparticle colloidal aggregates. Experimental verification was performed for single Au nanoparticles heated to the melting temperature and above up to full suppression of the surface plasmon resonance. It is emphasized that this effect may underlie the nonlinear optical response of composite materials containing plasmonic nanoparticles and their aggregates. © 2017, Springer-Verlag Berlin Heidelberg.

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Держатели документа:
Institute of Computational Modeling, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, Russian Federation
L.V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Ershov, A. E.; Ершов, Александр Евгеньевич; Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич
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12.

    Spin-wave spectroscopy and magnetostructural studies of Co nanogranular composites / E. A. Denisova [et al.] // Acta Phys. Pol. A. - 2018. - Vol. 134: Proceedings of International Symposium on Physics of Materials (ISPMA 14), Is. 3. - P. 623-626, DOI 10.12693/APhysPolA.134.623. - Cited References: 25. - This work was supported by RFBR grants nos. 16-03-00256, 16-03-00969. . - ISSN 0587-4246. - ISSN 1898-794X
   Перевод заглавия: Спин-волновая спектроскопия и магнитоструктурные исследования наногранулированных композитов на основе Со
Рубрики:
Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances
   Spin-wave resonance
   Magnetic anisotropy
Аннотация: Nanogranular Co-SiO2, and Co-CaF2 films are investigated using ferromagnetic resonance and magnetic measurements. The spectrum of standing spin-wave has been registered in the perpendicular experiment configuration for all types of films with the magnetic granules content above 52 vol.%. The dependences of resonance fields Hr of spin modes on the mode number squared Hr(n2) are non-linear. Such behavior is supposed to be the result of the fluctuations of magnetic parameters (the magnetization and the ferromagnetic exchange coupling) in nanocomposite films. A comparison between the magnetic properties of Co-SiO2 granular films and Co-CaF2 films is carried out. The surface anisotropy value Ks of Co-SiO2 films is evaluated from the surface resonance modes of spin-wave resonance spectra as 3.5×10-4s7×10-4 J/m2. The magnetic anisotropy of Co100-x(SiO2)x, Co100-x(CaF2)x films (34s and the surface magnetic anisotropy of films Ks are determined. It is found that surface anisotropy of granules is predominant.

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Держатели документа:
Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Akademgorodok 50, bld. 38, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Voronezh State Technical University, Voronezh, Russian Federation

Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Chekanova, L. A.; Чеканова, Лидия Александровна; Kalinin, Yu. E.; Sitnikov, A. V.; International Symposium on Physics of Materials(14 ; 2017 ; Sept. ; 10-15 ; Prague, Czech Republic)
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13.

    Spin-wave resonance in multilayer FeNiP/Pd films / R. S. Iskhakov [et al.] // Bull. Russ. Acad. Sci. Phys. - 2014. - Vol. 78, Is. 4. - P. 328-329, DOI 10.3103/S1062873814040145. - Cited References: 6. - This work was performed by order of the RF Ministry of Education and Science. . - ISSN 1062-8738. - ISSN 1934-9432
Рубрики:
Nuclear Physics
   Heavy Ions
   Hadrons
Кл.слова (ненормированные):
Chemical vapor deposition -- Pd film -- Spin wave resonances -- Multilayer films
Аннотация: Ferromagnetic and spin wave resonances are studied in FeNiP/Pd multilayer films obtained via chemical vapor deposition. The partial exchange interaction constant of polarized Pd films is found to be A Pd ≈ 1 × 10-7 erg/cm. © 2014 Allerton Press, Inc.

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Публикация на русском языке Спин-волновой резонанс в мультислойных пленках FeNiP/Pd [Текст] / Р. С. Исхаков, Л. А. Чеканова, С. В. Столяр, И. Г. Важенина // Изв. РАН. Сер. физич. - 2014. - Т. 78 № 4. - С. 502-503

Держатели документа:
L.V. Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660033, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Krasnoyarsk Institute of Railway Transport, Krasnoyarsk 660028, Russian Federation

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Chekanova, L. A.; Чеканова, Лидия Александровна; Stolyar, S. V.; Столяр, Сергей Викторович; Vazhenina, I. G.; Важенина, Ирина Георгиевна
}
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14.

SHAPIRO, V. E.
COMBINATION RESONANCES OF VORTICAL TYPE / V. E. SHAPIRO // Phys. Lett. A. - 1988. - Vol. 129, Is. 1. - P. 62-66, DOI 10.1016/0375-9601(88)90475-6. - Cited References: 4 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
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15.

Sadreev, A. F.
Tuning of Fano resonances by rotation of continuum: Wave faucet / A. F. Sadreev, A. S. Pilipchuk, A. A. Lyapina // Europhys. Lett. - 2017. - Vol. 117, Is. 5. - Ст. 50011, DOI 10.1209/0295-5075/117/50011. - Cited References:35. - This work has been supported by RFBR through Grant 17-02-00440. The authors thank E. N. Bulgakov and D. N. Maksimov for helpful discussions. . - ISSN 0295-5075. - ISSN 1286-4854

РУБ Physics, Multidisciplinary
Рубрики:
BOUND-STATES
TRAPPED MODES
ACOUSTIC RESONANCES
Аннотация: We consider wave transmission in a non-axisymmetric waveguide which consists of cylindrical resonator and two semi-infinite cylindrical waveguides whose axes are shifted relative to each other by azimuthal angle Δϕ. Although rotation by Δϕ does not change the eigenfrequency spectrum of the resonator, it effectively tunes the Fano resonances and respectively gives rise to an analog of a faucet opening and closing wave flux under rotation. Moreover, under the rotation of the waveguide and variation of the length of resonator, numerous events of the Fano resonance collapse occur to argue for the bound states in the continuum. In the nearest vicinity of the bound states scattering wave function with orbital angular momentum shows phase dislocations with giant vortical acoustic flows around.

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

Доп.точки доступа:
Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Lyapina, A. A.; Ляпина, Алина Андреевна; Садреев, Алмаз Фаттахович; RFBR [17-02-00440]
}
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16.

Sadreev, A. F.
Tuning of fano resonance by waveguide rotation: Wave faucet and bound states in the continuum / A. Sadreev, A. S. Pilipchuk, A. A. Pilipchuk // Fano Resonances in Optics and Microwaves: Physics and Applications / ed.: E. Kamenetskii, A. Sadreev, A. Miroshnichenko : Springer, 2018. - Vol. 219. - P. 497-525. - (Springer Series in Optical Sciences ; Vol. 219), DOI 10.1007/978-3-319-99731-5_21. - Cited References: 52. - This work has been supported by RFBR through Grant 17-02-00440. A. S. acknowledges discussions with E. N. Bulgakov, D. N. Maksimov, H. Schanz, P. Seba, L. Sirko, H.-J. Stöckmann and Shubo Wang.
Аннотация: We consider acoustic wave transmission in a non-axisymmetric waveguide composed of a cylindrical resonator of radius R and length L and two cylindrical waveguides of radius rR. The center lines of the waveguides are shifted relative to the center line of the resonator by a distance r0 and relative to each other by an azimuthal angle Δϕ. Under variation of L and fixed Δϕ we find bound states in the continuum (trapped modes) due to full destructive interference of resonant modes leaking into waveguides. Rotation by the angle Δϕ brings complex phases into the coupling strengths of the resonator eigenmodes with propagating modes of the waveguides. As the result interference of neighboring resonances strongly depends on rotation of the waveguide introducing novel way for tuning Fano resonances. In turn rotation of the input waveguide strongly affect the acoustic transmission through the resonator imitating a faucet in wave transmission. Under variation of Δϕ and fixed L we find symmetry protected trapped modes. For Δϕ≠0 these trapped modes contribute to the scattering function supporting high vortical acoustic intensity spinning inside the resonator.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kamenetskii, E. \ed.\; Sadreev, A. F. \ed.\; Садреев, Алмаз Фаттахович; Miroshnichenko, A. \ed.\; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Pilipchuk, A. A.; Пилипчук, Алина Андреевна
}
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17.

Sadreev, A. F.
Interference traps waves in an open system: bound states in the continuum / A. F. Sadreev // Rep. Prog. Phys. - 2021. - Vol. 84, Is. 5. - Ст. 055901, DOI 10.1088/1361-6633/abefb9. - Cited References: 154. - The work was partially supported by Russian Foundation for Basic Research Projects No. 19-02-00055 . - ISSN 0034-4885. - ISSN 1361-6633

РУБ Physics, Multidisciplinary
Рубрики:
FANO RESONANCES
   2ND-HARMONIC GENERATION
   QUANTUM-SYSTEMS
   UNIFIED THEORY
Кл.слова (ненормированные):
bound states in the continuum -- wave localization in one-dimensional wires -- open microwave and acoustic resonators -- effective non Hermitian Hamiltonian
Аннотация: I review the four mechanisms of bound states in the continuum (BICs) in the application of microwave and acoustic cavities open to directional waveguides. The most simple are symmetry-protected BICs, which are localized inside the cavity because of the orthogonality of the eigenmodes to the propagating modes of waveguides. However, the most general and interesting is the Friedrich-Wintgen mechanism, when the BICs are the result of the fully destructive interference of outgoing resonant modes. The third type of BICs, Fabry-Perot BICs, occurs in a double resonator system when each resonator can serve as an ideal mirror. Finally, the accidental BICs can be realized in the open cavities with no symmetry like the open Sinai billiard in which the eigenmode of the resonator can become orthogonal to the continuum of the waveguide accidentally due to a smooth deformation of the eigenmode. We also review the one-dimensional systems in which the BICs occur owing to the fully destructive interference of two waves separated by spin or polarization or by paths in the Aharonov-Bohm rings. We make broad use of the method of effective non-Hermitian Hamiltonian equivalent to the coupled mode theory, which detects BICs by finding zero-width resonances.

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

Доп.точки доступа:
Садреев, Алмаз Фаттахович; Russian Foundation for Basic Research Projects [19-02-00055]
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18.

    Sadreev, A. F.
    Gate controlled resonant widths in double-bend waveguides: bound states in the continuum / A. F. Sadreev, D. N. Maksimov, A. S. Pilipchuk // J. Phys.: Condens. Matter. - 2015. - Vol. 27, Is. 29. - Ст. 295303, DOI 10.1088/0953-8984/27/29/295303. - Cited References:52. - This work is supported by the Russian Science Foundation through Grant No. 14-12-00266. AS is grateful K-F Berggren for discussions. . - ISSN 0953. - ISSN 1361-648X
   Перевод заглавия: Управление резонансными ширинами в двух-коленных волноводах: связанные состояния в континууме

РУБ Physics, Condensed Matter
Рубрики:
CIRCULAR BENDS
   NUCLEAR REACTIONS
   FANO RESONANCES
   UNIFIED THEORY
   QUANTUM
   TRANSMISSION
   TRANSPORT
   SYSTEMS
Кл.слова (ненормированные):
double-bent waveguide -- effective non-Hermittian Hamiltonian -- bound -- states in the continuum
Аннотация: We consider quantum transmission through double-bend Pi- and Z-shaped waveguides controlled by the finger gate potential. Using the effective non-Hermitian Hamiltonian approach we explain the resonances in transmission. We show a difference in transmission in the short waveguides that is the result of different chirality in Z and Pi waveguides. We demonstrate that the potential selectively affects the resonant widths resulting in the occurrence of bound states in the continuum.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660080, Russia.

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Садреев, Алмаз Фаттахович; Russian Science Foundation [14-12-00266]
}
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19.

Sadreev, A. F.
Bound states in the continuum in zigzag quantum wire enforced by a finger gate / A. F. Sadreev, A. S. Pilipchuk // JETP Letters. - 2015. - Vol. 100, Is. 9. - P. 585-590, DOI 10.1134/S0021364014210139. - Cited References:41. - This work was supported by the Russian Foundation for Basic Research(project no. 14-12-00266). . - ISSN 0021. - ISSN 1090-6487. -

РУБ Physics, Multidisciplinary
Рубрики:
WAVE-GUIDE
   DOUBLE-BEND
   SYSTEMS
   TRANSMISSION
   RESONANCES
   ELECTRON
Аннотация: We consider electron transport in a zigzag quantum wire by the effect of finger gate potential. Using a non-Hermitian effective Hamiltonian, we calculate resonance positions and widths to show that the resonance widths are easily governed by the gate potential. In particular, the resonance width can be enforced to be equal to zero, which leads to an electron localization with the Fermi energy embedded in the propagation band of the wire, i.e., the bound state in the continuum (BSC). We show that, for positive values of the potential, a zigzag wire becomes a Fabry-Perot resonator to give rise to BSC too.

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Публикация на русском языке Садреев, Алмаз Фаттахович. Связанные состояния в континууме, инициированные потенциалом электрода в зигзагообразной квантовой проволоке [Текст] / А. Ф. Садреев, А. C. Пилипчук // Письма в Журн. эксперим. и теор. физ. - 2014. - Т. 100 Вып. 9-10. - С. 664– 669

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660080, Russia.

Доп.точки доступа:
Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Садреев, Алмаз Фаттахович; Russian Foundation for Basic Research [14-12-00266]
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20.

Sadreev, A. F.
Bound states in the continuum in open quantum billiards with a variable shape / A. F. Sadreev, E. N. Bulgakov, I. . Rotter // Phys. Rev. B. - 2006. - Vol. 73, Is. 23. - Ст. 235342, DOI 10.1103/PhysRevB.73.235342. - Cited References: 24 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
TRANSMISSION
   RESONANCES
   ELECTRON
   DYNAMICS
Аннотация: We show the existence of bound states in the continuum (BICs) in quantum billiards (QBs) that are opened by attaching single-channel leads to them. They may be observed by varying an external parameter continuously, e.g., the shape of the QB. At some values of the parameter, resonance states with vanishing decay width (the BICs) occur. They are localized almost completely in the interior of the closed system. The phenomenon is shown analytically to exist in the simplest case of a two level QB and is complemented by numerical calculations for a real QB.

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Держатели документа:
Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
ИФ СО РАН
Institute of Physics, Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany

Доп.точки доступа:
Bulgakov, E. N.; Булгаков, Евгений Николаевич; Rotter, I.; Садреев, Алмаз Фаттахович
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