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Bulgakov, E. N.
Fibers based on propagating bound states in the continuum / E. Bulgakov, A. Sadreev // Phys. Rev. B. - 2018. - Vol. 98, Is. 8. - Ст. 085301, DOI 10.1103/PhysRevB.98.085301. - Cited References: 40. - The authors thank D. N. Maksimov for assistance and discussions. This work was partially supported by the Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017) and the RFBR Grants No. 16-02-00314 and No. 17-52-45072. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Physics, Condensed Matter
Рубрики:
PHOTONIC CRYSTAL SLABS
   LIGHT
   RESONANCES
   RADIATION
   ARRAYS
Аннотация: We show that a circular periodic array of silicon dielectric cylinders supports nearly bound states in the continuum (BICs) propagating along the cylinders. These propagating nearly BICs with extremely large-Q factors are surrounded by resonant modes weakly leaking into the radiation continuum. We present leaky zones in the form of dispersion curves for complex eigenfrequencies dependent on propagation constant kz, with the wave vector directed along the cylinders in the vicinity of different types of BICs. Symmetry-protected nearly BICs have the resonant width proportional to squared propagation constant Γ∼k2z; the widths of non-symmetry-protected nearly BICs behave as Γ∼(kz−kc)2, where kc and non-symmetry-protected nearly BICs have the resonant width proportional to k4z. The latter propagating nearly BICs can serve for the transmission of a electromagnetic signal paving a way to a different type of optical fiber. We also demonstrate weakly leaking resonant modes which carry orbital angular momentum.

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Держатели документа:
Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Ministry of Education and Science of Russian Federation [3.1845.2017]; RFBR [16-02-00314, 17-52-45072]
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Bulgakov, E. N.
Nearly bound states in the radiation continuum in a circular array of dielectric rods / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. A. - 2018. - Vol. 97, Is. 3. - Ст. 033834, DOI 10.1103/PhysRevA.97.033834. - Cited References:35. - We acknowledge discussions with Andrey Bogdanov and Dmittrii Maksimov. This work was partially supported by the Ministry of Education and Science of the Russian Federation (State Contract No. 3.1845.2017) and RFBR Grants No. 16-02-00314 and No. 17-52-45072. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
WAVES
   LIGHT
   CYLINDERS
   RESONANCE
Аннотация: We consider E-polarized bound states in the radiation continuum (BICs) in circular periodical arrays of N infinitely long dielectric rods. We find that each true BIC which occurs in an infinite linear array has its counterpart in the circular array as a near-BIC with extremely large quality factor. We argue analytically as well as numerically that the quality factor of the symmetry-protected near-BICs diverges as eλN, where λ is a material parameter dependent on the radius and the refraction index of the rods. By tuning of the radius of rods, we also find numerically non-symmetry-protected near-BICs. These near-BICs are localized with exponential accuracy outside the circular array, but fill the whole inner space of the array carrying orbital angular momentum.

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

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Ministry of Education and Science of the Russian Federation [3.1845.2017]; RFBR [16-02-00314, 17-52-45072]
}
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Bikbaev, R. G.
Epsilon-Near-Zero Absorber by Tamm Plasmon Polariton / R. G. Bikbaev, S. Y. Vetrov, I. V. Timofeev // Photonics. - 2019. - Vol. 6, Is. 1. - Ст. 28, DOI 10.3390/photonics6010028. - Cited References: 45. - This research was funded by RFBR according to the research project No. 18-32-00053. I.V.T. and S.Y.V. acknowledge financial support from RFBR and MOST according to the research project No. 19-52-52006. . - ISSN 2304-6732

РУБ Optics
Рубрики:
PERFECT ABSORPTION
   PHOTONIC CRYSTAL
   PROPAGATION
   LIGHT
Кл.слова (ненормированные):
photonic crystal -- nanocomposite -- epsilon near-zero material -- Tamm plasmon polariton
Аннотация: Two schemes of excitation of a Tamm plasmon polariton localized at the interface between a photonic crystal and a nanocomposite with near-zero effective permittivity have been investigated in the framework of the temporal coupled-mode theory. The parameters of the structure have been determined, which correspond to the critical coupling of the incident field with a Tamm plasmon polariton and, consequently, ensure the total absorption of the incident radiation by the structure. It has been established that the spectral width of the absorption line depends on the scheme of Tamm plasmon polariton excitation and the parameters of a nanocomposite film. The features of field localization at the Tamm plasmon polariton frequency for different excitation schemes have been examined. It has been demonstrated that such media can be used as narrowband absorbers based on Tamm plasmon polaritons localized at the interface between a photonic crystal and a nanocomposite with near-zero effective permittivity.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Бикбаев, Рашид Гельмединович; RFBR; MOST [19-52-52006]
}
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Experimental observation of a symmetry-protected bound state in the continuum in a chain of dielectric disks / Z. F. Sadrieva [et al.] // Phys. Rev. A. - 2019. - Vol. 99, Is. 5. - Ст. 053804, DOI 10.1103/PhysRevA.99.053804. - Cited References:61. - The numerical simulations and experimental part of this work were supported by the Russian Science Foundation (Grant No. 17-12-01581), and the analytical calculations were supported by RFBR (Grant No. 18-32-20205) and the Ministry of Education and Science of the Russian Federation (3.1668.2017/4.6). The authors are thankful to Andrey Sayanskiy for assistance in the holder fabrication. A.A.B. and Z.F.S. acknowledge the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" for valuable financial support. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
LIGHT
   RESONANCES
   RADIATION
   MOMENTUM
   BEHAVIOR
   LAYER
Аннотация: The existence of bound states in the continuum (BIC) manifests a general wave phenomenon first predicted in quantum mechanics by John von Neumann and Eugene Wigner [J. von Neumann and E. Wigner, Phys. Z. 30, 465 (1929)]. Today it is being actively explored in photonics, radiophysics, acoustics, and hydrodynamics. We report an experimental observation of an electromagnetic bound state in the radiation continuum in a one-dimensional array of dielectric particles. By measurement of the transmission spectra of the ceramic disk chain at GHz frequencies, we demonstrate how a resonant state in the vicinity of the center of the Brillouin zone turns into a symmetry-protected BIC with increase in the number of the disks. We estimate a number of the disks when the radiation losses become negligible in comparison to material absorption and, therefore, the chain could be considered practically as infinite. The presented analysis is supplemented by measurements of the near fields of the symmetry-protected BIC. All measurements are in a good agreement with the results of the numerical simulation and analytical model based on a tight-binding approximation. The obtained results provide useful guidelines for practical implementations of structures with bound states in the continuum that opens up horizons for the development of optical and radio-frequency metadevices.

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Держатели документа:
ITMO Univ, Dept Nanophoton & Metamat, St Petersburg 197101, Russia.
Ceram Co Ltd, Giricond Res Inst, St Petersburg 194223, Russia.
RAS, SB, KSC, Kirensky Inst Phys Fed Res Ctr, Krasnoyarsk 660036, Russia.
Ioffe Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Sadrieva, Z. F.; Belyakov, M. A.; Balezin, M. A.; Kapitanova, P. V.; Nenasheva, E. A.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Bogdanov, A. A.; Russian Science Foundation [17-12-01581]; RFBR [18-32-20205]; Ministry of Education and Science of the Russian Federation [3.1668.2017/4.6]; Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS"
}
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Bulgakov, E. N.
Topological bound states in the continuum in arrays of dielectric spheres / E. N. Bulgakov, D. N. Maksimov // Phys. Rev. Lett. - 2017. - Vol. 118, Is. 26. - Ст. 267401, DOI 10.1103/PhysRevLett.118.267401. - Cited References:35. - This work was supported by Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017/4.6). We appreciate discussions with Almas F. Sadreev. . - ISSN 0031-9007. - ISSN 1079-7114

РУБ Physics, Multidisciplinary
Рубрики:
SYMMETRY-PROTECTED MODES
   LIGHT
   SUBWAVELENGTH
   RESONANCE
Аннотация: We consider Bloch bound states in the radiation continuum in periodic arrays of dielectric spheres. It is demonstrated that the bound states are associated with phase singularities of the quasimode coupling strength. That makes the bound states topologically protected and, therefore, robust against any variation of parameters preserving the periodicity and rotational symmetry about the array axis. It is shown that under variation of parameters the bound states can only be destroyed by either annihilation of the topological charge or by migration to the sector of the parametric space where the second radiation channel is open.

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

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; Ministry of Education and Science of Russian Federation [3.1845.2017/4.6]
}
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    Sadreev, A. F.
    Enhancement of Rayleigh scattering in a two-dimensional Fabry-Perot resonator loaded with impurities / A. F. Sadreev // J. Opt. Soc. Am. A. - 2016. - Vol. 33, Is. 7. - P. 1277-1282, DOI 10.1364/JOSAA.33.001277. - Cited References:32. - Russian Science Foundation (RSF) (14-12-00266) . - ISSN 1084-7529. - ISSN 1520-8532
   Перевод заглавия: Усиление Релеевского рассеяния в двумерном резонаторе Фабри-Перо с примесями

РУБ Optics
Рубрики:
COUPLED-MODE THEORY
   MULTIPLE-SCATTERING
   NUCLEAR REACTIONS
   UNIFIED THEORY
   RANDOM-MEDIA
   TRANSMISSION
   PARTICLES
   WAVES
   LIGHT
   STRIP
Аннотация: We study wave transmission through a Fabry-Perot resonator (FPR) loaded with point-like impurities. We show both analytically in the framework of the coupled mode theory and numerically that there are two different regimes for transmission dependent on the quality of the FPR mirrors. For low quality, we obtain transmittance very similar to the clean FPR with slightly shifted Lorentz peaks. However, for good quality, the transmittance peaks are strongly reduced and substituted with Gaussian peaks because of multiple scattering of waves by each impurity. As a side effect, we observe the angular (channel) conversion in the disordered FPR. We demonstrate that the resonant peaks are dependent on the concentration of impurities to pave a way for resonant measurement of the concentration. (C) 2016 Optical Society of America

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Доп.точки доступа:
Садреев, Алмаз Фаттахович; Russian Science Foundation (RSF) [14-12-00266]
}
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Shalaev, V. M.
Small-particle composites .2. Nonlinear optical properties / V. M. Shalaev, E. Y. Poliakov, V. A. Markel // Phys. Rev. B. - 1996. - Vol. 53, Is. 5. - P. 2437-2449, DOI 10.1103/PhysRevB.53.2437. - Cited References: 45 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
FRACTAL CLUSTERS
   RAMAN-SCATTERING
   SUSCEPTIBILITY
   CONDUCTIVITY
   EXCITATIONS
   COLLOIDS
   LIGHT
Аннотация: Strong fluctuations of local fields may result in very large optical nonlinearities in small-particle composites. Enhancement associated with particle clustering is found for a number of optical processes, including four-wave mixing (FWM), third-harmonic generation (THG), Raman scattering, and nonlinear refraction and absorption in Kerr media. Field fluctuations and optical nonlinear susceptibilities are especially large in fractal clusters. The enhancement of optical processes is expressed in terms of the resonant linear absorption by collective dipolar eigenmodes in a cluster, and quality factors, q, of the modes (q much greater than 1). It is shown that the susceptibility of a composite material consisting of random small-particle clusters is proportional to q(3) for Raman scattering and the Kerr optical nonlinearity, and to q(4) and q(6) for THG and FWM, respectively. For all of these processes, a spectral dependence of the effective susceptibility is found. Broad-scale numerical simulations of the optical response in small-particle composites are performed to complement the theory. The simulations are in reasonable agreement with available experimental data.

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Держатели документа:
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
RUSSIAN ACAD SCI,INST AUTOMAT & ELECTROMETRY,NOVOSIBIRSK 630090,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Poliakov, E. Y.; Markel, V. A.
}
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Bulgakov, E. N.
Transfer of spin angular momentum of an incident wave into orbital angular momentum of the bound states in the continuum in an array of dielectric spheres / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. A. - 2016. - Vol. 94, Is. 3. - Ст. 033856, DOI 10.1103/PhysRevA.94.033856. - Cited References:38. - The work was supported by the Russian Science Foundation through Grant No. 14-12-00266. We acknowledge discussions with D. N. Maksimov. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
LIGHT
LAYER
Аннотация: We consider scattering of electromagnetic plane waves by a linear periodic array of dielectric spheres. For incident waves with circular polarization with frequency tuned to the bound states with orbital angular momentum in the radiation continuum, the spin angular momentum of the incident wave transfers into the orbital angular momentum. This, in turn, gives rise to giant vortical power currents rotating around the array. Incident wave with linear polarization with frequency tuned to the Bloch bound state in the continuum induces giant laminar power currents.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Russian Science Foundation [14-12-00266]
}
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    Belyaev, B. A.
    Resonances of electromagnetic oscillations in a spherical metal nanoparticle / B. A. Belyaev, V. V. Tyurnev // Microw. Opt. Technol. Lett. - 2016. - Vol. 58, Is. 8. - P. 1883-1886, DOI 10.1002/mop.29930. - Cited References:18 . - ISSN 0895-2477. - ISSN 1098-2760
   Перевод заглавия: Резонансы электромагнитных колебаний в сферической металлической наночастице

РУБ Engineering, Electrical & Electronic + Optics
Рубрики:
OPTICAL-PROPERTIES
LIGHT
Кл.слова (ненормированные):
plasmonics -- scattering -- particles -- resonators -- resonant modes
Аннотация: Electrodynamic analysis of plasma oscillations in a spherical metal nanoparticle is performed. It is shown that typical reduction in the frequency and quality factor of the resonances with increasing nanoparticle radius fades if the mode number grows. Depending on the particle radius, the resonant enhancement of the electric field might considerably either increase or decrease with increasing mode number. (C) 2016 Wiley Periodicals, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk, Russia.
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Tyurnev, V. V.; Тюрнев, Владимир Вениаминович; Беляев, Борис Афанасьевич
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10.

    Glass-ceramics with thermally stable blue-red emission for high-power horticultural LED applications / W. B. Chen, X. J. Zhang, J. X. Zhou [et al.] // J. Mater. Chem. C. - 2020. - Vol. 8, Is. 12. - P. 3996-4002, DOI 10.1039/d0tc00061b. - Cited References: 36. - The present work was supported by the National Natural Science Foundations of China (Grant No. 21671070); the Project of GDUPS (2018) for Prof. Bingfu LEI; the Guangzhou Science & Technology Project, China (No. 201704030086); and the National Undergraduate Innovation and Entrepreneurship Training Program grant for Gening Xie (No. 201910564035). . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Стеклокерамика с термостойким сине-красным излучением для мощных светодиодов применимых для выращивания агрокультур

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
PLANT-GROWTH
   ENERGY-TRANSFER
   CARBON DOTS
   PHOSPHOR
   LIGHT
Аннотация: As one of the key elements of indoor agriculture, horticultural light sources are developing rapidly towards requiring high energy density, high output power and high stability, which poses a challenge for traditional phosphor conversion devices. To address this, an all-inorganic blue-red dual-emitting light convertor consisting of Ba1.3Sr1.7MgSi2O8:Eu2+,Mn2+ (BSMS) phosphor-in-glass (PiG) plates was prepared to improve the duration lifetime of converted high-power light-emitting diodes (LEDs) and meet the light quality requirements of photosynthesis for indoor agriculture. The obtained samples show an external quantum efficiency of 45.3%, outstanding thermal stability and a specific emission spectrum that highly matches the absorption of chlorophyll and β-carotene. Moreover, a proof-of-concept BSMS-PiG horticultural lamp for application in an indoor plant factory was successfully fabricated based on a ∼370 nm emitting LED chip. The blue-red ratio of its spectrum could be regulated by controlling the thickness of BSMS-PiG and the concentrations of Mn2+ ions within BSMS-PiG. The BSMS-PiG horticultural LEDs were applied to the indoor cultivation of Romaine lettuce. The results indicated that the biomass of Romaine lettuce was 58.21% greater than that of control lettuce samples cultivated under commercial plant lamps. In particular, the content values of total chlorophyll, β-carotene and soluble protein were improved. The BSMS-PiG horticultural LED is a potential candidate to act as a high-power horticultural light source.

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Держатели документа:
South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Peoples R China.
Minist Educ, Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China.
Minist Educ, Key Lab Modern Agr Mat, Guangzhou 510642, Peoples R China.
South China Univ Technol, Sch Mat Sci & Engn, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Peoples R China.
South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510641, Peoples R China.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Chen, Weibin; Zhang, Xuejie; Zhou, Jianxian; Zhang, Haoran; Zhuang, Jianle; Xia, Zhiguo; Liu, Yingliang; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xie, Gening; Lei, Bingfu
}
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11.

    Processes underlying the laser photochromic effect in colloidal plasmonic nanoparticle aggregates* / A. E. Ershov, V. S. Gerasimov, I. L. Isaev [et al.] // Chin. Phys. B. - 2020. - Vol. 29, Is. 3. - Ст. 037802, DOI 10.1088/1674-1056/ab6551. - Cited References: 38. - Project funded by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science (Grant 18-42-243023), the RF Ministry of Science and Higher Education, and the State Contract with Siberian Federal University for Scientific Research. A.E. thanks the grant of the President of Russian Federation (agreement 075-15-2019-676). . - ISSN 1674-1056. - ISSN 1741-4199
Рубрики:
SELECTIVE PHOTOMODIFICATION
   LIGHT
   FORCES
   OPTICS
Кл.слова (ненормированные):
nanoparticle -- surface plasmon resonance -- photochromic process -- pulsed laser radiation
Аннотация: We have studied the dynamic and static processes occurring in disordered multiparticle colloidal Ag aggregates with natural structure and affecting their plasmonic absorption spectra under pico- and nanosecond pulsed laser radiations, as well as the physical origin responsible for these processes. We have shown that depending on the duration of the laser pulse, the mechanisms of laser modification of such aggregates can be associated both with changes in the resonant properties of the particles due to their heating and melting (picosecond irradiation mode) and with the particle shifts in the resonant domains of the aggregates (nanosecond pulses) which depend on the wavelength, intensity, and polarization of the radiation. These mechanisms result in formation of a narrow dip in the plasmonic absorption spectrum of the aggregates near the laser radiation wavelength and affect the shape and position of the dip. The effect of polydispersity of nanoparticle aggregates on laser photochromic reaction has been studied.

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Держатели документа:
RAS, SB, Inst Computat Modeling, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
RAS, SB, KSC, Kirensky Inst Phys,Fed Res Ctr, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Ershov, A. E.; Gerasimov, V. S.; Isaev, I. L.; Gavrilyuk, A. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory [18-42-243023]; Krasnoyarsk Regional Fund of Science [18-42-243023]; RF Ministry of Science and Higher Education; Siberian Federal University for Scientific Research; Russian FederationRussian Federation [075-15-2019-676]
}
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12.

    Angular tuning of defect modes spectrum in the one-dimensional photonic crystal with liquid-crystal layer / V. G. Arkhipkin [et al.] // Eur. Phys. J. E. - 2007. - Vol. 24, Is. 3. - P297-302, DOI 10.1140/epje/i2007-10239-7. - Cited Reference Count: 28 . - NOV. - ISSN 1292-8941
Рубрики:
PERIODIC STRUCTURE
   REFRACTIVE-INDEX
   ENHANCEMENT
   LIGHT
   LASER
Кл.слова (ненормированные):
42.25.Bs Wave propagation, transmission and absorption -- 42.70.Df Liquid crystals -- 42.70.Qs Photonic bandgap materials -- Angles of incidence -- Angular tuning -- Defect modes -- Electric polarization -- Photonic bandgap materials -- Radiation losses -- Absorption -- Defects -- Light polarization -- Liquid crystals -- One dimensional -- Phase shift -- Wave propagation -- Photonic crystals
Аннотация: A one-dimensional ZrO2/SiO2 photonic crystal with a 4-n -pentyl-4'-cyanobiphenyl (5CB) nematic defect layer was used to investigate the transmission spectra of light polarized parallel and perpendicular to the liquid-crystal director at different angles of incidence. The spectra of the photonic crystal were shown to split into four polarized components T-ij at oblique incidence. When the incident angle increased, the bandgap edges and the defect modes shifted towards short wavelengths, while the amplitudes of the defect modes increased for the transverse magnetic polarization and decreased for the transverse electric polarization. The observed discrepancy between the defect mode amplitudes in the center and near the edges of the photonic bandgap was found to be related to the radiation losses inside the defect layer of a non-ideal photonic crystal. The simulated transmission spectra obtained using recurrence relations and taking into account the decay of defect modes are in good agreement with the experimental data.

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Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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13.

Small-angle scattering and radiation polarization by a stretched polymer film with nematic liquid crystal droplets having a single-domain structure / V. A. Loiko, A. V. Konkolovich, A. A. Miskevich [et al.] // Opt. Spectrosc. - 2020. - Vol. 128, Is. 3. - P. 331-338, DOI 10.1134/S0030400X20030121. - Cited References: 24. - This work was carried out within the framework of the agreement on interacademic collaboration between the National Academy of Sciences of Belarus and Siberian Branch of the Russian Academy of Sciences. It was supported by the Belarusian Republican Foundation for Fundamental Research (project no. F18RA-003). M.N. Krakhalev acknowledges the support of the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, and Krasnoyarsk Krai Foundation of Science (grant no. 18-42-243006). . - ISSN 0030-400X. - ISSN 1562-6911

РУБ Optics + Spectroscopy
Рубрики:
IONIC MODIFICATION
LIGHT
Кл.слова (ненормированные):
light scattering -- radiation polarization -- liquid crystal
Аннотация: The coefficient of directed transmittance of a stretched polymer-dispersed liquid crystal film with a defect-free single-domain liquid crystal droplet structure formed by a stretched surfactant-doped film and the polarization degree of forward-transmitted light in the visible and near-infrared spectrum ranges are studied. Results are presented for the 5CB, E7, and E44 nematic liquid crystals. Dependences of the transmission coefficient and polarizing ability of the film on the photodetector field of view are studied. Relationships allowing one to determine film parameters at which the transmission coefficient and polarizing ability of the films simultaneously reach values close to limit ones (0.5 and ±1.0, respectively) are obtained in the Foldy–Twersky and anomalous diffraction approximations.

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Публикация на русском языке Малоугловое рассеяние и поляризация излучения вытянутой полимерной пленкой с каплями нематического жидкого кристалла, имеющими монодоменную структуру [Текст] / В. А. Лойко, А. В. Конколович, А. А. Мискевич, М. Н. Крахалев // Оптика и спектроскопия. - 2020. - Т. 128 Вып. 3. - С. 343-350

Держатели документа:
Natl Acad Sci Belarus, Stepanov Inst Phys, Minsk 220072, BELARUS.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Loiko, V. A.; Konkolovich, A. V.; Miskevich, A. A.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Belarusian Republican Foundation for Fundamental Research [F18RA-003]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk krai; Krasnoyarsk Krai Foundation of Science [18-42-243006]
}
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14.

IR-range photoinduced diode effect in the manganese-substituted bismuth ferrite films / S. S. Aplesnin [et al.] // Semicond. Sci. Technol. - 2019. - Vol. 34, Is. 9. - Ст. 095007, DOI 10.1088/1361-6641/ab3160. - Cited References: 45. - The reported study was funded by RFBR according to the research project No 18-52-00009 Bel_ a; No 18-32-00079 mol_ a and Belarusian Foundation project No F18R-084. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science No 18-42-240001 r_ a, to the research project: "Inversion of the sign of the components of the magnetoelectric tensor on the temperature in films of bismuth garnet ferrite replaced by neodymium". This work is part of the research program the state order No 3.5743.2017/6.7. . - ISSN 0268-1242. - ISSN 1361-6641

РУБ Engineering, Electrical & Electronic + Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
POOLE-FRENKEL CONDUCTION
BIFEO3 FILMS
LIGHT
Кл.слова (ненормированные):
multiferroic -- films -- diode effect -- polarization -- I-V characteristics -- optical absorption
Аннотация: The photoinduced diode effect has been found in BiMnxFe1-xO3 (0 < X < 0.15) films in the near-infrared and violet spectral ranges in a wide temperature interval. The dependences of the diode effect on temperature, wavelength, and illumination power have been established. The mechanism of the ferroelectric diode has been determined using its I-V characteristics at different illumination powers, optical spectra, far-infrared absorption spectra, and electric polarization hysteresis. The interplay between the photodiode effect and conductivity mechanism has been elucidated. The model of strong Coulomb potential fluctuations and quantum well asymmetry caused by the electric polarization in the film and difference between the times of carrier thermalization and recombination of electrons and holes is proposed.
В пленках феррита висмута BiMnxFe1-xO3 (0< x < 0.15) обнаружен фотоиндуцированный диодный эффект в ближней инфракрасной и фиолетовой областях спектра в широкой области температур. Определена зависимость диодного эффекта от температуры, длины волны, мощности освещения. Механизм ферроэлектрического диода определяется из вольт-амперных характеристик при разных интенсивностях освещения, оптических спектров и спектров поглощения в дальней ИК области, гистерезиса электрической поляризации. Устанавливается связь фотодиодного эффекта с механизмом проводимости. Предложена модель сильных флуктуаций кулоновского потенциала, асимметрия квантовых ям в результате наличия электрической поляризации в пленке и отличие времен термолизации носителей тока и рекомбинации электронов и дырок.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Sci Pract Mat Res Ctr NAS Belarus, Minsk, BELARUS.

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Kretinin, V. V.; Masyugin, A. N.; Romanova, O. B.; Романова, Оксана Борисовна; Sitnikov, M. N.; Begisheva, O. B.; Galyas, A., I; Demidenko, O. F.; Yanushkevich, K., I; RFBR [18-52-00009 Bel_ a, 18-32-00079 mol_ a]; Belarusian Foundation [F18R-084]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-240001 r_ a]; [3.5743.2017/6.7]
}
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15.

Bulgakov, E. N.
High-Q resonant modes in a finite array of dielectric particles / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. A. - 2019. - Vol. 99, Is. 3. - Ст. 033851, DOI 10.1103/PhysRevA.99.033851. - Cited References: 58. - We acknowledge discussions with D. N. Maksimov. This work was partially supported by the Ministry of Education and Science of the Russian Federation (State Contract No. 3.1845.2017) and RFBR Grant No. 19-02-00055. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
OPTICAL BOUND-STATES
   PERIODIC ARRAY
   CONTINUUM
   LIGHT
   ENHANCEMENT
Аннотация: We trace the Q factor of the resonant modes which are limited to bound states in the continuum (BICs) for N=∞ in the finite array of N dielectric spheres and disks. For the symmetry-protected BICs we observe the quadratic dependence of the Q factor on N for high-refractive-index particles, while for low-refractive-index particles there is an interplay between the quadratic and cubic dependencies. The Q factor of accidental BICs grows cubically with N. We show that a plane wave can excite these quasi-BICs for tuning of the angle of incidence.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Ministry of Education and Science of the Russian Federation [3.1845.2017]; RFBR [19-02-00055]
}
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16.

Quasi-bound States in the Continuum in a Finite Chain of Dielectric Scatterers: Theory and Experiment / M. Balyzin [et al.] ; ed.: W. C. Chew, S. . He // Progress in Electromagnetics Research Symposium (PIERS-Toyama) : IEEE, 2018. - Vol. 2018-August. - P. 2516-2519. - (Progress in Electromagnetics Research Symposium), DOI 10.23919/PIERS.2018.8598011. - Cited References: 27. - This work was supported by the Russian Foundation for Basic Research (16-37-60064, 17-02-01234, 16-02-00314), the Ministry of Education and Science of the Russian Federation (3.1668.2017/4.6), the President of Russian Federation (MK-403.2018.2). . -

РУБ Engineering, Electrical & Electronic + Physics, Applied
Рубрики:
LIGHT
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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Держатели документа:
ITMO Univ, Dept Nanophoton & Metamat, St Petersburg, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.

Доп.точки доступа:
Balyzin, M.; Sadrieva, Z.; Belyakov, M. A.; Kapitanova, P.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Bogdanov, A. A.; Chew, W.C. \ed.\; He, S... \ed.\; Russian Foundation for Basic Research [16-37-60064, 17-02-01234, 16-02-00314]; Ministry of Education and Science of the Russian Federation [3.1668.2017/4.6]; Russian Federation [MK-403.2018.2]; Progress in Electromagnetics Research Symposium 2018(Aug 01-04, 2018 ; Toyama, Japan)
}
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17.

    Шабанов, Александр Васильевич.
    Особенности усиления электромагнитного поля и увеличение плотности фотонных состояний в растительных фотонно-кристаллических структурах / А. В. Шабанов, М. А. Коршунов, Е. Р. Буханов // Комп. оптика. - 2019. - Т. 43, № 2. - С. 231-237 ; Comput. Opt., DOI 10.18287/2412-6179-2019-43-2-231-237. - Библиогр.: 29 . - ISSN 0134-2452. - ISSN 2412-6179
   Перевод заглавия: Features of the amplification of the electromagnetic field and the density of states of photonic crystal structures in plants

РУБ Optics
Рубрики:
BLUE IRIDESCENCE
   LIGHT
   COLOR
   PULSE
   BAND
Кл.слова (ненормированные):
фотонный кристалл -- дефектная мода -- фотонная запрещенная зона -- слоистые периодические структуры -- плотность фотонных состояний -- photonic crystal -- defect mode -- photonic band gap -- layered periodic structures -- density of states
Аннотация: Проведены расчёты с использованием метода трансфер матриц одномерных фотонных кристаллов с низким контрастом и разнопериодными асимметричными структурами. Такие структуры были найдены во многих растениях. При состыковке двух последовательно соединённых подрешёток с разными периодами отмечается увеличение амплитуды электромагнитного поля и плотности фотонных состояний внутри структуры и их изменение в зависимости от асимметрии толщин подрешёток.
Calculations were performed using the transfer matrix of one-dimensional photonic crystals with low contrast and asymmetric structures of different periods. Such structures have been found in many plants. When joining two successively connected sublattices with different periods, an increase is observed in the amplitude of the electromagnetic field and the density of photon states inside the structure, and their change depends on the asymmetry of the thickness of the sublattices.

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Держатели документа:
Институт физики им. Л.В. Киренского, ФИЦ КНЦ СО РАН, Красноярск, Россия
ФИЦ КНЦ СО РАН, Красноярск, Россия

Доп.точки доступа:
Коршунов, Михаил Анатольевич; Korshunov, M. A.; Буханов, Евгений Романович; Bukhanov E. R.; Shabanov, A. V.

}
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18.

    Bulgakov, E. N.
    Nonlinear response from optical bound states in the continuum / E. N. Bulgakov, D. N. Maksimov // Sci Rep. - 2019. - Vol. 9. - Ст. 7153, DOI 10.1038/s41598-019-43672-y. - Cited References: 48. - This work was supported by Ministry of Education and Science of Russian Federation (state contract N 3.1845.2017/4.6). We appreciate discussions with Ya Yan Lu, Lijun Yuan, Andrey M. Vyunishev, and Ivan V. Timofeev. . - ISSN 2045-2322
   Перевод заглавия: Нелинейный отклик, индуцированный оптическими связанными состояниями в континууме

РУБ Multidisciplinary Sciences
Рубрики:
WAVE-GUIDE
   WAVELENGTH
   RESONANCES
   SILICON
   LIGHT
Аннотация: We consider nonlinear effects in scattering of light by a periodic structure supporting optical bound states in the continuum. In the spectral vicinity of the bound states the scattered electromagnetic field is resonantly enhanced triggering optical bistability. Using coupled mode approach we derive a nonlinear equation for the amplitude of the resonant mode associated with the bound state. We show that such an equation for the isolated resonance can be easily solved yielding bistable solutions which are in quantitative agreement with the full-wave solutions of Maxwell's equations. The coupled mode approach allowed us to cast the the problem into the form of a driven nonlinear oscillator and analyze the onset of bistability under variation of the incident wave. The results presented drastically simplify the analysis nonlinear Maxwell's equations and, thus, can be instrumental in engineering optical response via bound states in the continuum.

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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.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; Ministry of Education and Science of Russian Federation [N 3.1845.2017/4.6]
}
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19.

Geometric phase and ο-mode blueshift in a chiral anisotropic medium inside a Fabry-Pérot cavity / I. V. Timofeev [et al.] // Phys. Rev. E. - 2015. - Vol. 92, Is. 5. - Ст. 052504, DOI 10.1103/PhysRevE.92.052504. - Cited References: 92. - This work was supported in part by Russian Foundation for Basic Research Grants No. 14-02-31248 and No. 15-02-06924; Ministry of Education and Science of the Russian Federation under the Government program, Project No. 3.1276.2014/K; and the Ministry of Science and Technology of Taiwan under Grant No. NSC 103-2923-M-009-003-MY3 through an NSC–SB RAS joint project . - ISSN 1539-3755

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
NEMATIC LIQUID-CRYSTAL
   DIMENSIONAL PHOTONIC CRYSTAL
   OPTICAL-PROPERTIES
   ELECTROMAGNETIC PROPAGATION
   DISPLAYS
   SYSTEMS
   FILTER
   LIGHT
   CELL
   FORMULATION
Аннотация: Anomalous spectral shift of transmission peaks is observed in a Fabry-Pérot cavity filled with a chiral anisotropic medium. The effective refractive index value resides out of the interval between the ordinary and the extraordinary refractive indices. The spectral shift is explained by contribution of a geometric phase. The problem is solved analytically using the approximate Jones matrix method, numerically using the accurate Berreman method, and geometrically using the generalized Mauguin-Poincaré rolling cone method. The o-mode blueshift is measured for a 4-methoxybenzylidene-4′-n-butylaniline twisted-nematic layer inside the Fabry-Pérot cavity. The twist is electrically induced due to the homeoplanar-twisted configuration transition in an ionic-surfactant-doped liquid crystal layer. Experimental evidence confirms the validity of the theoretical model. © 2015 American Physical Society.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Laboratory for Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Imaging and Biomedical Photonics, College of Photonics, National Chiao Tung University, Guiren District, Tainan, Taiwan

Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Lee, W.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
Свободных экз. нет}
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20.

Arkhipkin, V. G.
Effect of electromagnatically induced transparency on spectrum of defect modes of photonic crystal - art. no. 67292H / V. G. Arkhipkin, S. A. Myslivets, I. V. Timofeev ; ed.: VN Belyi, KN Drabovich, KN Drabovich ; International Conference on Coherent and Nonlinear Optics (2007) // ICONO 2007: Coherent and nonlinear optical phenomena. Ser. proceedings of the society of photo-optical instrumentation engineers (SPIE) / International Conference on Coherent and Nonlinear Optics (2007) : SPIE-Int. Soc. Optical Engineering, 2007. - Vol. 6729. - P. H7292-H7292, DOI 10.1117/12.751966. - Cited References: 33 . - ISBN 0277-786X. - ISBN 978-0-8194-6886-4

РУБ Optics
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
   NONLINEAR OPTICS
   COHERENT MEDIA
   LIGHT
   MICROCAVITIES
   PULSES
Кл.слова (ненормированные):
photonic crystal -- defect mode -- photonic band gap -- localized mode -- electromagnetically induced transparency -- Defect mode -- Electromagnetically induced transparency -- Localized mode -- Photonic band gap -- Photonic crystal -- Crystal defects -- Dispersion (waves) -- Electromagnetic field effects -- Transparency -- Photonic crystals
Аннотация: The effect of electromagnetically induced transparency on the spectrum of defect modes of one-dimensional photonic crystal is discussed theoretically. Narrowing of defect mode linewidth is predicted due to nonabsorbing highly dispersive medium in defect layer.

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Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Timofeev, I. V.; Тимофеев, Иван Владимирович; Belyi, VN \ed.\; Drabovich, K. N. \ed.\; Архипкин, Василий Григорьевич; International Conference on Coherent and Nonlinear Optics(2007)
}
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