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Оптические связанные состояния в континууме в одномерной фотоннокристаллической структуре / П. С. Панкин, Б.-Р. Ву, Ж.-Х. Янг [и др.] // Енисейская фотоника-2020 : тезисы докладов. - Красноярск : ИФ СО РАН, 2020. - С. 175-176. - Cited References: 3 . - ISBN 978-5-6042995-8-6
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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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Панкин, Павел Сергеевич; Pankin, P. S.; Ву, Б.-Р.; Янг, Ж.-Х.; Чэнь, Г.-П.; Тимофеев, Иван Владимирович; Timofeev, I. V.; Садреев, Алмаз Фаттахович; Sadreev, A. F.; 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(1 ; 2020 ; сент. ; 14-19 ; Красноярск)
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Pilipchuk, A. S.
Bound states in the continuum in open spherical resonator / A. S. Pilipchuk, A. A. Pilipchuk, A. F. Sadreev // Phys. Scr. - 2020. - Vol. 95, Is. 8. - Ст. 085002, DOI 10.1088/1402-4896/ab99fb. - Cited References: 33 . - ISSN 0031-8949
Кл.слова (ненормированные):
Bound states in the continuum -- effective non-Hermitian Hamiltonian -- acoustic resonator -- trapped modes
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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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pilipchuk, A. A.; Пилипчук, Алина Андреевна; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пилипчук, Артем Сергеевич
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Bulgakov, E. N.
Interaction between dielectric particles enhances the Q factor. / E. N. Bulgakov, K. N. Pichugin, A. F. Sadreev // Journal of Physics: Conference Series. - 2020. - Vol. 1461, Is. 1. - Ст. 012144, DOI 10.1088/1742-6596/1461/1/012144. - 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
Кл.слова (ненормированные):
Anti-symmetric -- Avoided crossings -- Dielectric particles -- Identical particles -- Individual particles -- Quality factors -- Strong enhancement -- Two particles -- Q factor measurement
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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Kirensky Institute of Physics, Federal Research Center, KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; International Conference on Metamaterials and Nanophotonics(4 ; 2019 ; 15 - 19 July ; St. Petersburg, Russian Federation)
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Bulgakov, E. N.
Giant resonant enhancement of optical binding of dielectric particles / E. N. Bulgakov, K. N. Pichugin, A. F. Sadreev // Phys. Rev. A. - 2020. - Vol. 102, Is. 4. - Ст. 043518, DOI 10.1103/PhysRevA.102.043518. - 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 . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
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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Держатели документа:
RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Foundation for Basic Research ProjectRussian Foundation for Basic Research (RFBR) [19-02-00055]
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Bulgakov, E. N.
Resonant bending of silicon nanowires by incident light / E. N. Bulgakov, A. F. Sadreev // Opt. Lett. - 2020. - Vol. 45, Is. 19. - P. 5315-5318, DOI 10.1364/OL.406109. - Cited References: 29 . - ISSN 0146-9592
Кл.слова (ненормированные):
Aspect ratio -- Elastic waves -- Silicon -- Wave propagation
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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Держатели документа:
Kirensky Institute of Physics, Federal Research Center, KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Неравновесные процессы в кристаллах с конкурирующими взаимодействиями: NH4HSeO4 / И. П. Александрова, А. А. Суховский, О. В. Розанов [и др.] // Современные методы ЯМР и ЭПР в химии твердого тела : сборник статей всесоюз. сов. - Черноголовка, 1985. - С. 56-59. - Библиогр.: 3

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Александрова, Инга Петровна; Aleksandrova, I. P.; Суховский, Андрей Андреевич; Sukhovskii, A. A.; Розанов, Олег Владимирович; Москвич, Юрий Николаевич; Moskvich Yu.N.; Садреев, Алмаз Фаттахович; Sadreev, A. F.; 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)
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    One-dimensional photonic bound states in the continuum / P. S. Pankin, B. R. Wu, J. H. Yang [et al.] // Commun. Phys. - 2020. - Vol. 3, Is. 1. - Ст. 91, DOI 10.1038/s42005-020-0353-z. - 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. . - ISSN 2399-3650
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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Держатели документа:
FRC KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Natl Chiao Tung Univ, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan.
Natl Chiao Tung Univ, Inst Photon Syst, Tainan 71150, Taiwan.

Доп.точки доступа:
Pankin, P. S.; Панкин, Павел Сергеевич; Wu, B. -R.; Yang, J. -H.; Chen, K. -P.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Sadreev, A. F.; Садреев, Алмаз Фаттахович; 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]
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    Pilipchuk, A. S.
    Generation of vortex waves in non-coaxial cylindrical waveguides / A. S. Pilipchuk, A. A. Pilipchuk, A. F. Sadreev // J. Acoust. Soc. Am. - 2019. - Vol. 146, Is. 6. - Ст. 4333, DOI 10.1121/1.5139222. - Cited References: 26. - We acknowledge discussions with Dmitrii Maksimov. This work was supported by RFBR Grant No. 18-32-00234. . - ISSN 0001-4966. - ISSN 1520-8524
   Перевод заглавия: Генерация вихревых волн в некоаксиальных цилиндрических волноводах
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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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Pilipchuk, A. A.; Пилипчук, Алина Андреевна; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пилипчук, Артем Сергеевич
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Bulgakov, E. N.
Evolution of the resonances of two parallel dielectric cylinders with distance between them / E. N. Bulgakov, K. N. Pichugin, A. F. Sadreev // Phys. Rev. A. - 2019. - Vol. 100, Is. 4. - Ст. 043806, DOI 10.1103/PhysRevA.100.043806. - 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. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
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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Держатели документа:
Russian Acad Sci, Siberian Branch, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; 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]
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10.

Pichugin, K. N.
Interaction between coaxial dielectric disks enhances the Q factor / K. N. Pichugin, A. F. Sadreev // J. Appl. Phys. - 2019. - Vol. 126, Is. 9. - Ст. 093105, DOI 10.1063/1.5094188. - 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). . - ISSN 0021-8979. - ISSN 1089-7550

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

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пичугин, Константин Николаевич; 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]
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