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Bulgakov, E. N.
Guiding electromagnetic waves through the bound states in the radiation continuum in novel types / E. N. Bulgakov, A. F. Sadreev // The 9th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META’18) : Program / spec. sess. org. A. F. Sadreev [et al.]. - 2018. - Session 4A10: Fano Resonances in Optics and Microwaves: Physics and Application III. - P. 78. - Материалы конференции публикуются в журналах: Nanophotonics, Applied Physics A, Optical Materials Express, Advanced Electromagnetics

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Доп.точки доступа:
Sadreev, A. F. \spec. sess. org.\; Садреев, Алмаз Фаттахович; Sadreev, A. F.; International Conference on Metamaterials, Photonic Crystals and Plasmonics(9 ; 2018 ; June 24 - July 1 ; Marseille, France)
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Bulgakov, E. N.
On bound states in the continuum in dielectric gratings / M. Balyzin [et al.] // The 9th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META’18) : Program / spec. sess. org. A. F. Sadreev [et al.]. - 2018. - Session 4A3: Fano Resonances in Optics and Microwaves: Physics and Application II. - P. 71. - Материалы конференции публикуются в журналах: Nanophotonics, Applied Physics A, Optical Materials Express, Advanced Electromagnetics
Аннотация: In this work we experimentally observe a symmetry protected optical bound state in the continuum(BIC) with zero angular momentum in 1D array of ceramic disks at GHz frequencies. We analyze the dependence of Q factor of BIC on the number of the disks and the level of the material losses. We confirmed theoretical prediction about quadratic growth of the Q factor with the number of the disks and its following saturation due to material losses.

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Доп.точки доступа:
Sadreev, A. F. \spec. sess. org.\; Садреев, Алмаз Фаттахович; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; International Conference on Metamaterials, Photonic Crystals and Plasmonics(9 ; 2018 ; June 24 - July 1 ; Marseille, France)
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Kolovsky, A. R.
Wannier-Stark states and topological phase transitions in tilted two-dimensional bipartite lattices / A. R. Kolovsky // Humboldt Kolleg. Controlling quantum matter: From ultracold atoms to solids : conference materials. - 2018

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Доп.точки доступа:
Коловский, Андрей Радиевич; Controlling quantum matter: From ultracold atoms to solids, Humboldt Kolleg(2018 ; July 29 - August 2 ; Vilnius, Lithuania)Vilnius University; Lithuanian Physical Society
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Local properties of rare earth ferroborates in the optically excited states / A. V. Malakhovskii [et al.] // XVII International Feofilov Symposium on spectroscopy of crystals doped with rare earth and transition metal ions (IFS'XVII) : book of abstracts. - 2018. - P. 209-210

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Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Gudim, I. A.; Гудим, Ирина Анатольевна; Temerov, V. L.; Темеров, Владислав Леонидович; International Feofilov Symposium on spectroscopy of crystals doped with rare earth and transition metal ions(17 ; 2018 ; Sept. ; 23-28 ; Ekaterinburg, Russia)
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Estimation of the thermal and photochemical stabilities of pheromones / F. N. Tomilin [et al.] // J. Mol. Model. - 2018. - Vol. 24, Is. 11. - Ст. 323, DOI 10.1007/s00894-018-3859-5. - Cited References: 35. - This study was supported by the Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 16-44-243019 and the Russian Foundation for Basic Research, project no. 15-02-06869 and no. 16-04-00132. . - ISSN 1610-2940
Кл.слова (ненормированные):
Kinetic stability -- Atomic structure -- Density functional theory -- Excited states -- Terpenes
Аннотация: The correlation between the kinetic stability of molecules against temperature and variations in their geometric structure under optical excitation is investigated by the example of different organic pheromone molecules sensitive to temperature or ultraviolet radiation using the density functional theory. The kinetic stability is determined by the previously developed method based on the calculation of the probability of extension of any structural bond by a value exceeding the limit value Lмах corresponding to the breaking of the bond under temperature excitation. The kinetic stability calculation only requires the eigenfrequencies and vibrational mode vectors in the molecule ground state to be calculated, without determining the transition states. The weakest bonds in molecules determined by the kinetic stability method are compared with the bond length variations in molecules in the excited state upon absorption of light by a molecule. Good agreement between the results obtained is demonstrated and the difference between them is discussed. The universality of formulations within both approaches used to estimate the stability of different pheromone molecules containing strained cycles and conjugated, double, and single bonds allows these approaches to be applied for studying other molecules.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Federal Research Center KSC SB RAS, International Scientific Center for Extreme Organism States Research, Krasnoyarsk, 660036, Russian Federation
Sukachev Institute of Forest, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Tomilin, F. N.; Томилин, Феликс Николаевич; Fedorov, A. S.; Федоров, Александр Семенович; Artyushenko, P. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Ovchinnikova, T. M.; Tsikalova, P. E.; Soukhovolsky, V. G.
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Sadreev, A. F.
Near bound states in the radiation continuum in circulararray of dielectric rods / A. F. Sadreev // International Conference on Nanophotonics and Metamaterials(METANANO 2018). - 2018

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Садреев, Алмаз Фаттахович; International Conference on Nanophotonics and Metamaterials(3 ; 2018 ; Sept. 17-21 ; Sochi, Russia)Санкт-Петербургский национальный исследовательский университет информационных технологий, механики и оптики
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    Electronic states of the iron ions in the oxygen deficient perovskite Gd0.2Sr0.8FeO3-δ / Yu. V. Knyazev [и др.] // Мёссбауэровская спектроскопия и её применения : сб. материалов XV международной конференции. - Ростов-на-Дону, 2018. - С. 45 . - ISBN 978-5-9275-2831-8
   Перевод заглавия: Электронные состояния ионов железа в перовските Gd0.2Sr0.8FeO3-δ

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Материалы конференции

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Solovyov, L. A.; Соловьев, Леонид Александрович; Verechschagin, S. N.; Burkov, A. T.; Novikov, S. V.; Мёссбауэровская спектроскопия и её применения, международная конференция(15 ; 2018 ; сент ; 10-16 ; Сочи); Mössbauer Spectroscopy and Applications, International Conference(15 ; 2018 ; Sept. ; 10-16 ; Sochi); Южный федеральный университет; МИРЭА-Российский технологический университет; Российская академия наук; Институт кристаллографии им. А.В. Шубникова РАН; Федеральный научно-исследовательский центр "Кристаллография и фотоника" РАН; Московский государственный университет им. М.В. Ломоносова
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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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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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10.

Bulgakov, E. N.
Avoided crossings and bound states in the continuum in low-contrast dielectric gratings / E. N. Bulgakov, D. N. Maksimov // Phys. Rev. A. - 2018. - Vol. 98, Is. 5. - Ст. 053840, DOI 10.1103/PhysRevA.98.053840. - Cited References: 49. - This work was supported by Ministry of Education and Science of the Russian Federation (State Contract No. 3.1845.2017/4.6). We are grateful to K. N. Pichugin for assistance with the computations. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
RESONANCES
Аннотация: We consider bound states in the continuum (BICs) in low-contrast dielectric gratings. It is demonstrated that the BICs originate from the reduced guided modes on the effective dielectric slab with the permittivity equal to the average permittivity of the dielectric grating. In the case of isolated resonances, the positions of BICs can be found from two-wave dispersion relationships for guided leaky modes. In the case of the degeneracy between the two families of leaky modes, the system exhibits an avoided crossing of resonances. In the spectral vicinity of the avoided crossing the transmittance as well as the emergence of BICs is described in the framework of the generic formalism by Volya and Zelevinsky [Phys. Rev. C 67, 054322 ( 2003)] with a single fitting parameter.

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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 [3.1845.2017/4.6]
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