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    Preparation and structural properties of nonlinear optical borates K 2(1-x)Rb 2xAl 2B 2O 7, 0 ˂ x ˂ 0.75 / V. V. Atuchin [и др.] // J. Alloys Compd. - 2012. - Vol. 515. - P. 119-122, DOI 10.1016/j.jallcom.2011.11.115. - Cited References: 30. - This study was supported by SB RAS (Grant 34) and RFBR Grants 11-02-90706-mob_st and 11-03-00867a. . - ISSN 0925-8388
   Перевод заглавия: Получение и структурные свойства нелинейных оптических боратов K 2(1-x)Rb 2xAl 2B 2O 7, 0 ˂ x ˂ 0.75

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering + Aluminum + Crystal structure + Nonlinear optics + Rietveld analysis + Rubidium + Solid solutions + Structural properties + X ray powder diffraction
Рубрики:
UV-light generation
   Frequence-conversion
   K2Al2B2O7 crystal
   Composition ratio
   Mixed-crystals
   Growth
   KRbAl2B2O7
   NLO properties
   Non-linear optical
   Non-linear optical properties
   Rietveld analysis of X-ray powder diffraction data
   Solubility limits
   Space Groups
   Structural parameter
Кл.слова (ненормированные):
KRbAl2B2O7 -- Solid solution -- Crystal structure -- NLO properties
Аннотация: The structures of K 2(1-x)Rb 2xAl 2B 2O 7, x = 0.25, 0.5, 0.75, have been determined in space group P321 through Rietveld analysis of X-ray powder diffraction data. The solubility limit in K 2(1-x)Rb 2xAl 2B 2O 7 crystals has been estimated as x similar to 0.83-0.9. Nonlinear optical properties of KRbAl 2B 2O 7 have been verified by powder Kurtz-Perry method. Mechanisms of structural parameter variation in K 2Al 2B 2O 7 crystal family have been discussed.

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Доп.точки доступа:
Atuchin, V. V.; Bazarov, B. G.; Gavrilova, T. A.; Grossman, V. G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bazarova, Zh. G.
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Influence of band-to-band transition on light-controlled self-assembly of semiconductor nanoparticles / V. V. Slabko [et al.] // ICONO/LAT 2013 : Advance conference program. - 2013. - Ст. IWS8. - P. 67

Материалы конференции,
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Доп.точки доступа:
Slabko, V. V.; Слабко, Виталий Васильевич; Slyusareva, E. A.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Tsipotan, A. S.; Glushkov, А. А.; International Conference on Coherent and Nonlinear Optics(2013 ; June ; 18-22 ; Moscow); International Conference on Lasers, Applications, and Technologies(2013 ; June ; 18-22 ; Moscow)
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    Enhanced light absorption with a cholesteric liquid crystal layer / I. V. Timofeev [et al.] // Opt. Mater. Express. - 2013. - Vol. 3, Is. 4. - P. 496-501DOI 10.1364/OME.3.000496
   Перевод заглавия: Усиление поглощения света при помощи холестерического жидкокристаллического слоя
Аннотация: We discuss the trapping features of cholesteric liquid crystal as a self-organized photonic crystal and suggest it for absorption improvement. The imperfection of the absorbing surface is manifested by the reflection originating from the indispensable impedance mismatch. The reflection can be suppressed by an additional surface coating to reflect the light back to the absorber once again. In the simple consideration this reflection loop is possible only twice. For a right-handed CLC coating, the boundary reflection switches the light polarization from left to right circular in the first loop and it switches in the second loop back to the left circular polarization before the emerging light finally escapes from the absorbing process. The enhancement of light absorption is possible in the frequency range as large as the photonic bang gap of the cholesteric layer, which can be adjusted as desired.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Natl Chiao Tung Univ, Coll Photon, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan

Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vetrov, S. Y.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, W.
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Bulgakov, E. N.
Giant optical vortex in photonic crystal waveguide with nonlinear optical cavity / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. B. - 2012. - Vol. 85, Is. 16. - Ст. 165305, DOI 10.1103/PhysRevB.85.165305. - Cited References: 43. - The work is partially supported by RFBR grant 12-02-00483. We thank D. N. Maksimov and K. N. Pichugin for assistance in the manuscript preparation. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SYMMETRY-BREAKING
   FIBER
   MICROCAVITIES
   COUPLER
   INSTABILITIES
   GRATINGS
   MODES
   LIGHT
Аннотация: We consider light transmission in a directional photonic crystal waveguide that holds a nonlinear defect with two resonant dipole modes within the light propagation band. For the defect positioned on the center line of the waveguide, there are two ways to break the mirror symmetry with respect to either light intensity or light phase. The latter results in a giant vortex of the Poynting vector of the power current within the defect exceeding the input current by, at least, two orders of magnitude. We also consider the breaking of symmetry relative to the mirror reflection with respect to the cross-sectional axis of the waveguide when light is injected equally into both ends of the waveguide. This leads to different light outputs determined by the vorticity of the optical vortex.

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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Sibian State Aerosp Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Bulgakov, E. N.
All-optical manipulation of light in X- and T-shaped photonic crystal waveguides with a nonlinear dipole defect / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. B. - 2012. - Vol. 86, Is. 7. - Ст. 75125, DOI 10.1103/PhysRevB.86.075125. - Cited References: 38. - The work is partially supported by Integration Project of Siberian Branch of RAS (Project No. 29) and RFBR Grant No. 12-02-000094. We thank D. N. Maksimov for critical reading of the manuscript. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SPONTANEOUS SYMMETRY-BREAKING
   FIBER
   CAVITIES
   SYSTEM
   FIELDS
Аннотация: We consider light transmission in X- and T-shaped photonic crystal waveguides which hold nonlinear defect with two resonant dipole modes. By use of the coupled-mode theory and by numerical solution of the Maxwell equations for the transverse-magnetic (TM) light mode, we show two stable types of the solutions. The first type has no cross talk, while the second type does owe to nonlinearity of the defect. We show also that direct path transmission processes in the waveguides play an important role for breaking of symmetry.

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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Siberian State Aerosp Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Structural and luminescence properties of yellow-emitting NaScSi 2O6:Eu2+ phosphors: Eu2+ Site preference analysis and generation of red emission by codoping Mn2+ for white-light-emitting diode applications / Z. Xia [et al.] // J. Phys. Chem. C. - 2013. - Vol. 117, Is. 40. - P. 20847-20854DOI 10.1021/jp4062225. - Cover image: Artwork representing main idea of this article
Аннотация: The structural properties of clinopyroxene NaScSi2O6 have been investigated using the X-ray powder diffraction refinement, and the luminescence properties of Eu2+ and Eu2+/Mn 2+-activated NaScSi2O6 have been studied to explore the new materials for phosphor-converted white light ultraviolet light-emitting diodes (UV-LEDs). Eu2+ was introduced into the NaScSi2O6 host in the reducing atmosphere, and the preferred crystallographic positions of the Eu2+ ions were determined based on the different structural models of the NaScSi2O6 host. The as-obtained NaScSi2O6:Eu2+ phosphor shows greenish yellow emission with the broad-band peak at 533 nm, and efficient energy transfer (ET) takes place between Eu2+ and Mn2+ in NaScSi2O6, leading to a series of color-tunable phosphors emitting at 533 and 654 nm for the designed NaScSi2O 6:Eu2+,Mn2+ phosphors under excitation at 365 nm. The ET mechanism of Eu2+ and Mn2+ has also been evaluated. We have demonstrated that NaScSi2O6:Eu 2+ and NaScSi2O6:Eu2+,Mn 2+ materials exhibit great potential to act as the effective phosphors for UV-LEDs. В© 2013 American Chemical Society.

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Держатели документа:
China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia
SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia

Доп.точки доступа:
Xia, Zhiguo; Zhang, Y.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Atuchin, V. V.
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    Bulgakov, E. N.
    Light-induced degeneracy of resonance modes in a nonlinear microcavity coupled with waveguides: Application to channel drop filter / E. N. Bulgakov, A. F. Sadreev // J. Opt. Soc. Am. B. - 2013. - Vol. 30, Is. 9. - P. 2549-2554, DOI 10.1364/JOSAB.30.002549 . - ISSN 0740-3224
   Перевод заглавия: Свето-индуцированное восстановления вырождения в нелинейном микрорезонаторе, связанного с волноводами: приложение к переключателю каналов
Кл.слова (ненормированные):
Channel drop filters -- Channel dropping -- Eigen modes -- Injected power -- Light-induced -- Parallel waveguides -- Resonance mode -- Two-dimensional photonic crystals -- Microcavities -- Natural frequencies -- Waveguides -- Waveguide filters
Аннотация: We consider a microcavity with degenerate dipole or hexapole eigenmodes. If the cavity is positioned between waveguides, degeneracy is lifted. However, we show that in a nonlinear microcavity the degeneracy is recovered at certain injected power. In application we consider a two-dimensional photonic crystal of GaAs rods holding two parallel waveguides and one defect made of Kerr media. We show that 100% efficiency channel dropping can be attained without a necessity to tune the resonant frequencies of the microcavity. В© 2013 Optical Society of America.

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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Линейный и квадратичный магнитооптические эффекты в проходящем свете в тонких пленках La0.7Sr0.3MnO3 / Ю. Э. Гребенькова [и др.] // Письма в Журн. эксперим. и теор. физ. - 2013. - Т. 98, вып. 8. - С. 518 – 522DOI 10.7868/S0370274X13200058
Аннотация: Обнаружен и исследован магнитный линейный дихроизм (МЛД) поликристаллических пленок La0.7Sr0.3MnO3 в проходящем свете. Получены спектральные и температурные зависимости МЛД в области энергий световой волны E от 1.5 до 3.5 эВ. Экспериментальные спектры аппроксимированы суммой кривых формы Лорентца. В спектре МЛД выявлено значительно большее количество особенностей по сравнению со спектрами магнитного кругового дихроизма (МКД), измеренными нами ранее для тех же пленочных образцов. Обнаружено различное температурное поведение интенсивностей лорентцевых компонент, центрированных при различных значениях E. Оно может быть связано с влиянием поверхностных состояний на магнитооптические свойства образцов.

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Переводная версия Linear and quadratic magneto-optical effects observed in La0.7Sr0.3MnO3 thin films in transmitted light. - [Б. м. : б. и.]

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

Доп.точки доступа:
Гребенькова, Юлия Эрнестовна; Greben'kova Yu.E.; Соколов, Алексей Эдуардович; Sokolov A.E.; Эдельман, Ирина Самсоновна; Edelman, I. S.; Андреев, Н. В.; Чичков, В. И.; Муковский, Я. М.
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Light passage through the polymer film of liquid crystal droplets with modified boundary conditions / V. A. Loiko [et al.] // Semiconductor Physics, Quantum Electronics and Optoelectronics. - 2013. - Vol. 16, № 1. - P. 185-189. - This work was performed under the aegis of the Integration Project and supported by the Belarusian Republican Foundation for Fundamental Research, Project No. F12SO-007
Кл.слова (ненормированные):
polymer dispersed liquid crystal -- transmittance -- scattering -- light modulation
Аннотация: A method to analyze coherent transmission coefficients and the small-angle light scattering structure of PDLC layer with homogeneous and inhomogeneous boundary conditions on the droplets surface is discussed. For PDLC films with inhomogeneous boundary conditions at the polymer -- liquid crystal interface, asymmetry of the angular structure of light scattering with respect to the polar angle is revealed. Besides, experimental results on transmittance are presented.

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Держатели документа:
B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Nezalezhnastsi ave., Minsk, 220072 Belarus
L.V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences Krasnoyarsk,660036, Russia

Доп.точки доступа:
Loiko, V. A.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Konkolovich, A. V.; Miskevich, A. A.
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10.

Popov, E. A.
Temperature and field dependence of exciton-magnon absorption of NaMnCl//3. / E. A. Popov, M. M. Kotlyarskii, I. S. Edelman // Physica Status Solidi B - Basic Research. - 1985. - Vol. 132, Is. 2. - P. 465-470 . - ISSN 0370-1972
Кл.слова (ненормированные):
BAND STRUCTURE -- LIGHT - Absorption -- SODIUM COMPOUNDS - Optical Properties -- EXCITON-MAGNON ABSORPTION -- SODIUM MANGANESE CHLORIDE -- MAGNETIC MATERIALS
Аннотация: The behaviour of the optical absorption bands of NaMnCl//3 is experimentally studied in the region of the **6A//1//g to **4A//1//g, **4E//g(**4G) transition of the Mn**2** plus ion in the temperature range 1. 8 to 20 K and in magnetic fields up to 20 T. Exciton and its 'hot' magnon sidebands are observed in the spectrum. The anomalous temperature dependence of the exciton-magnon bands intensity is explained by participation of magnons with wave vector K does not equal 0 in absorption. The low energy exciton-magnon band is supposed to be due to simultaneous creation of an exciton and annihilation of three thermally created magnons.

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Доп.точки доступа:
Kotlyarskii, M. M.; Edelman, I. S.; Эдельман, Ирина Самсоновна
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