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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Панкин, Павел Сергеевич, Ву Б.-Р., Янг Ж.-Х., Чэнь Г.-П., Тимофеев, Иван Владимирович, Садреев, Алмаз Фаттахович
Заглавие : Оптические связанные состояния в континууме в одномерной фотоннокристаллической структуре
Коллективы : Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук", Институт физики им. Л.В. Киренского Сибирского отделения РАН, Сибирский федеральный университет, "Енисейская фотоника", Всероссийская научная конференция с международным участием
Место публикации : Енисейская фотоника-2020: тезисы докладов. - Красноярск: ИФ СО РАН, 2020. - С. 175-176. - ISBN 978-5-6042995-8-6 (Шифр В34/Е 63-418308835)
Примечания : Cited References: 3
Аннотация: Выращен монокристалл HoGa3(BO3)4. Оптическая ширина запрещенной зоны, определенная по измеренному спектру поглощения, обусловлена прямым разрешенным переходом и равна 4,14 эВ. Опти-ческие свойства этого кристалла рассчитаны на основе теории функционала плотности. Расчетное значе-ние ширины запрещенной зоны 4.17 эВ.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pilipchuk A. S., Pilipchuk A. A., Sadreev A. F.
Заглавие : Bound states in the continuum in open spherical resonator
Место публикации : Phys. Scr. - 2020. - Vol. 95, Is. 8. - Ст.085002. - ISSN 00318949 (ISSN), DOI 10.1088/1402-4896/ab99fb
Примечания : Cited References: 33
Аннотация: We consider the bound states in the continuum (BICs) or embedded trapped modes in an open spherical acoustic resonator. The eigenfrequencies of closed resonator are 2l+1-fold degenerated, where l is the orbital index. An attachment of two cylindrical waveguides lifts this degeneracy and transforms the eigenfrequencies into resonances whose real parts depend on the position of the waveguides. When the waveguides are angled by θ ≠ π, variation over that angle gives rise to avoided crossings of resonant modes with different l to result in the Friedrich-Wintgen BICs. For θ = π there might be only the symmetry protected BICs. When three waveguides are connected to the spherical resonator the Friedrich-Wintgen BICs occur due to the avoided crossings of resonant modes with the same l but different azimuthal indices -l ≤ m ≤ l.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие : Interaction between dielectric particles enhances the Q factor.
Коллективы : International Conference on Metamaterials and Nanophotonics
Место публикации : International Conference on Metamaterials and Nanophotonics (4 ; 2019 ; 15 - 19 July ; St. Petersburg, Russian Federation). Journal of Physics: Conference Series. - 2020. - Vol. 1461, Is. 1. - Ст.012144. - , DOI 10.1088/1742-6596/1461/1/012144
Примечания : Cited References: 22. - This work was supported by Russian Science Foundation through Grant 19-02-00055. A. S. thanks A. Bogdanov for numerous and fruitful discussions
Аннотация: We consider resonant modes of two dielectric identical particles which can be classified as symmetric and anti symmetric combinations of the resonant modes of individual particles. We show that an approaching of two particles gives rise to an avoided crossing of resonant poles because of interaction between the disks. That in turn results in strong enhancement of the quality factor factor of two disks compared to isolated disks.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие : Giant resonant enhancement of optical binding of dielectric particles
Коллективы : Russian Foundation for Basic Research ProjectRussian Foundation for Basic Research (RFBR) [19-02-00055]
Место публикации : Phys. Rev. A. - 2020. - Vol. 102, Is. 4. - Ст.043518. - ISSN 2469-9926, DOI 10.1103/PhysRevA.102.043518. - ISSN 2469-9934(eISSN)
Примечания : Cited References: 49. - This work was supported by Russian Foundation for Basic Research Project No. 19-02-00055. A.S. thanks D. Maksimov and E. Sherman for helpful discussions
Предметные рубрики: FORCE
SPHERES
BEAM
Аннотация: Optical coupling of two identical dielectric particles gives rise to bonding and antibonding resonances. The latter is featured by significant narrowing of the resonant width and strong enhancement of the Q factor for the high-index micron-size particles in subwavelength range. We consider particles shaped as spheres and disks under coaxial illumination of dual incoherent counterpropagating Bessel beams. In the case of spheres we derive analytical expressions for the optical binding (OB) force which decays and displays two periods of oscillations. For close distances the OB force enormously increases in the resonant regime. The case of two coaxial disks is featured by extremal enhancement of the Q factor owing to the twofold variation over the distance between disks and the aspect ratio of each disk compared to the case of two spheres. In that case we demonstrate enhancement of the OB force up to several tens of nanonewtons. We show that the magnitude and sign of the OB force strongly depend on the longitudinal wave vector of the Bessel beams.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F.
Заглавие : Resonant bending of silicon nanowires by incident light
Место публикации : Opt. Lett. - 2020. - Vol. 45, Is. 19. - P.5315-5318. - ISSN 01469592 (ISSN), DOI 10.1364/OL.406109
Примечания : Cited References: 29
Аннотация: Coupling of two dielectric wires with a rectangular cross section gives rise to bonding and anti-bonding resonances. The latter is featured by extremal narrowing of the resonant width for variation of the aspect ratio of the cross section and distance between wires. A plane wave resonant to this anti-bonding resonance gives rise to unprecedent enhancement of the optical forces up to several nano Newtons per micrometer length of the wires. The forces oscillate with the angle of incidence of the plane wave but always try to repel the wires. If the wires are fixed at the ends, the light power 1.5mW/µm2 bends wires with length 50 µm by order 100 nm.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Александрова, Инга Петровна, Суховский, Андрей Андреевич, Розанов, Олег Владимирович, Москвич, Юрий Николаевич, Садреев, Алмаз Фаттахович
Заглавие : Неравновесные процессы в кристаллах с конкурирующими взаимодействиями: NH4HSeO4
Коллективы : Всесоюзное координационное совещание ученых и специалистов институтов АН СССР, отраслевых институтов и вузов по проблеме применения в химии твердого тела современных методов ЯМР и ЭПР
Место публикации : Всесоюзное координационное совещание ученых и специалистов институтов АН СССР, отраслевых институтов и вузов по проблеме применения в химии твердого тела современных методов ЯМР и ЭПР (4 ; 1985 ; 20-22 мая ; Черноголовка). Современные методы ЯМР и ЭПР в химии твердого тела: сборник статей всесоюз. сов. - Черноголовка, 1985. - С. 56-59
Примечания : Библиогр.: 3
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankin P. S., Wu, B. -R., Yang, J. -H., Chen, K. -P., Timofeev I. V., Sadreev A. F.
Заглавие : One-dimensional photonic bound states in the continuum
Коллективы : Russian Foundation for Basic Research projectRussian Foundation for Basic Research (RFBR) [19-52-52006, 19-02-00055]; Higher Education Sprout Project of the National Chiao Tung University; Ministry of Education; Ministry of Science and Technology (MOST)Ministry of Science and Technology, China [107-2221-E-009-046-MY3, 108-2923-E-009-003-MY3]; RFBRRussian Foundation for Basic Research (RFBR) [19-02-00055]
Место публикации : Commun. Phys. - 2020. - Vol. 3, Is. 1. - Ст.91. - ISSN 2399-3650, DOI 10.1038/s42005-020-0353-z
Примечания : Cited References: 57. - The reported study was funded by Russian Foundation for Basic Research project Nos. 19-52-52006 and 19-02-00055. This project is also supported by the Higher Education Sprout Project of the National Chiao Tung University and Ministry of Education and the Ministry of Science and Technology (MOST No. 107-2221-E-009-046-MY3; No. 108-2923-E-009-003-MY3). S.A.F. thanks RFBR for the research project No. 19-02-00055. The authors are thankful to D.N. Maksimov for valuable discussions and comments.
Предметные рубрики: RESONANCES
VORTEX
Аннотация: Bound states in the continuum have recently found application to sensing, lasing and optoelectronics, but have not been realised in 1D. Here, destructive interference of electron spin in a tilted magnetic field is shown to give rise to bound states in the continuum of a 1D layered photonic crystal. In 1985 Fridriech and Wintgen proposed a mechanism for bound states in the continuum based on full destructive interference of two resonances which can be easily applied to the two- and three-dimensional wave systems. Here we explicitly show that this mechanism can be realized in one-dimensional quantum potential well, owing to destructive interference of electron paths with different spin in tilted magnetic field. Due to one-by-one correspondence between the spin of the electron and the polarization state of light, we have found numerous bound states in the continuum in the one-dimensional photonic system and experimentally confirmed them. The experimental set-up consists of the one-dimensional photonic crystal conjugated with a liquid-crystalline anisotropic defect layer and covered by metal film.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pilipchuk A. S., Pilipchuk A. A., Sadreev A. F.
Заглавие : Generation of vortex waves in non-coaxial cylindrical waveguides
Место публикации : J. Acoust. Soc. Am. - 2019. - Vol. 146, Is. 6. - Ст.4333. - ISSN 0001-4966, DOI 10.1121/1.5139222. - ISSN 1520-8524 (eISSN)
Примечания : Cited References: 26. - We acknowledge discussions with Dmitrii Maksimov. This work was supported by RFBR Grant No. 18-32-00234.
Предметные рубрики: Operator theory
Coordinate system
Waveguides
Wave mechanics
Acoustic field
Optical field
Optical tweezers
Acoustical properties
Acoustic waves
Electrical properties and parameters
Аннотация: A non-coaxial waveguide composed of a cylindrical resonator of radius R and cylindrical waveguides with the radii r1 and r2, respectively, is considered. The radii satisfy the inequality r1˂r2˂R. The conversion from the channel with zero orbital angular momentum (OAM) into the channels with non-zero OAM is achieved by shifting the center lines of the waveguides relative to the center line of the cylindrical resonator. The center lines of input and output waveguides are shifted relative to each other by the angle Δϕ in order to twist the output acoustic wave. The conversion efficiency of the input wave with zero OAM into the output wave with non-zero OAM as dependent on the frequency, length of the resonator, and Δϕ is considered, and the domains where the efficiency can reach almost 100% are found.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие : Evolution of the resonances of two parallel dielectric cylinders with distance between them
Коллективы : Ministry of Education and Science of Russian FederationMinistry of Education and Science, Russian Federation [3.1845.2017]; Russian Foundation for Basic research RFBRRussian Foundation for Basic Research (RFBR) [19-02-00055]
Место публикации : Phys. Rev. A. - 2019. - Vol. 100, Is. 4. - Ст.043806. - ISSN 2469-9926, DOI 10.1103/PhysRevA.100.043806. - ISSN 2469-9934(eISSN)
Примечания : Cited References: 37. - We acknowledge discussions with D. N. Maksimov. This work was partially supported by Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017) and The Russian Foundation for Basic research RFBR Grant No. 19-02-00055.
Предметные рубрики: WHISPERING-GALLERY MODES
MULTIPLE-SCATTERING
FACTOR ENHANCEMENT
Аннотация: We study evolution of resonant modes by traversing over the distance between two parallel dielectric cylinders. The processes of mutual scattering of Mie resonant modes by cylinders result in an interaction between the cylinders which lifts a degeneracy of resonances of the isolated cylinders. There are two basic scenarios of evolution. For strong interaction of cylinders resonances bypass the Mie resonances with increase of the distance. That scenario is typical for low-lying resonances (monopole and dipole). For weak interaction of cylinders the resonances are bound around the Mie resonances of isolated cylinders that form the second scenario. Both scenarios demonstrate a significant enhancement of the Q factor compared to the case of an isolated cylinder.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Sadreev A. F.
Заглавие : Interaction between coaxial dielectric disks enhances the Q factor
Коллективы : Russian Federation for Basic Research (RFBR)Russian Foundation for Basic Research (RFBR) [19-02-00055]; Ministry of Education and Science of Russian FederationMinistry of Education and Science, Russian Federation [3.1845.2017]
Место публикации : J. Appl. Phys. - 2019. - Vol. 126, Is. 9. - Ст.093105. - ISSN 0021-8979, DOI 10.1063/1.5094188. - ISSN 1089-7550(eISSN)
Примечания : Cited References: 32. - We are grateful to A. A. Bogdanov, E. N. Bulgakov, and D. N. Maksimov for numerous and fruitful discussions. This work was supported by the Russian Federation for Basic Research (RFBR) (Grant No. 19-02-00055) and Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017).
Предметные рубрики: WHISPERING-GALLERY MODES
QUALITY-FACTOR
Аннотация: We study the behavior of resonant modes under variation of the distance between two coaxial dielectric disks and show an avoided crossing of resonances because of the interaction between the disks. Owing to coaxial arrangement of disks, the resonant modes are specified by the azimuthal index m = 0,1,2, ... . In the present paper, we consider the case m = 0. At a long enough distance, the modes are symmetric and antisymmetric hybridizations of the resonant modes of the isolated disk. With decreasing the distance, the interaction becomes stronger, giving rise to avoided crossings of different resonances of the isolated disk. This in turn enhances the Q factor of the two disks by one order in magnitude compared to the Q factor of the isolated disk.
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