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    Spectral modulation of a bistable liquid-crystal photonic structure by the polarization effect / Yu-Cheng Hsiao [et al.] // Opt. Mater. Express. - 2013. - Vol. 3, Is. 6. - P. 821-828DOI 10.1364/OME.3.000821
   Перевод заглавия: Спектральная модуляция бистабильной жидкокристаллической фотонной структуры при помощи поляризационного эффекта
Аннотация: The light polarization has an effect on spectral properties of a multilayered photonic crystal infiltrated with a bistable chiral-tilted homeotropic nematic liquid crystal (LC) as a defect layer. By varying the direction of polarization of incident, linearly polarized light interacting with the birefringent LC, the tunability of defect modes in wavelength and amplitude and the broadening of the low-transmittance range can be realized in the transmission spectrum. The LC features two optically stable states and two voltage-sustained states. The bistability makes the device of low energy consumption. Such a hybrid can be used as not only a wavelength selector, optical shutter or multichannel switch but also a stopband-tunable device.

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Держатели документа:
Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
Chung Yuan Christian Univ, Dept Elect Engn, Chungli 32023, Taiwan
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Hsiao, Yu-Cheng; Yu-Cheng Hsiao; Zou, Yi-Hong; Yi-Hong Zou; Timofeev, I. V.; Тимофеев, Иван Владимирович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, W.
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    Cerenkov nonlinear diffraction of femtosecond pulses / A. M. Vyunishev [et al.] // J. Opt. Soc. Am. B. - 2013. - Vol. 30, Is. 7. - P. 2014-2021, DOI 10.1364/JOSAB.30.002014. - Cited References: 43. - The work was partially supported by the Grant of the President of the Russian Federation MK-250.2013.2, by RFBR through Grant No. 12-02-31167, by the Ministry of Education and Science of the Russian Federation (Contract No. 14.B37.21.0730), by Krasnoyarsk Regional Fund of Science and Technical Activity Support, by PSB RAS Project 2.5.2, and by SFU Grant F12. . - ISSN 0740-3224
   Перевод заглавия: Черенковская нелинейная дифракция фемтосекундных импульсов

РУБ Optics
Рубрики:
STRONTIUM BARIUM NIOBATE
   2ND-HARMONIC GENERATION
   PHOTONIC CRYSTAL
   DOMAIN-WALLS
   MODULATION
Аннотация: Cerenkov nonlinear diffraction of femtosecond pulses in one-dimensional nonlinear photonic crystal of strontium tetraborate was studied theoretically and experimentally in both frequency and time domains. Spectral features of second harmonic radiation were measured in the course of mapping the nonlinear photonic crystal structure. The local second harmonic spectrum demonstrates complex angular behavior within the beam cross section. The spectral width of the second harmonic radiation is found to be fundamental beam size-dependent, and optimal focusing should be used for exact conversion of the fundamental spectrum into the second harmonic one. Experimental results are in excellent agreement with calculations. Maximum second harmonic generation efficiency was up to 2.1% at pumping by a femtosecond oscillator. (C) 2013 Optical Society of America

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660079, Russia

Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zaitsev, A. I.; Зайцев, Александр Иванович; Slabko, V. V.; Слабко, Виталий Васильевич
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The formation of higher and endohedral fullerenes in the plasma of high-frequency arc with low-frequency modulation under elevated helium pressure / I. V. Osipova [et al.] // Int. Conf. "Adv. Carbon Nanostruct." (ACNS) : Abstract of inv. lect. and contrib. papers. - St. Petersburg, 2013. - P. 140

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Доп.точки доступа:
Osipova, I. V.; Осипова, Ирина Владимировна; Churilov, G. N.; Чурилов, Григорий Николаевич; Glushchenko, G. A.; Глущенко, Гарий Анатольевич; Lopatin, V. A.; Лопатин, Владислав Александрович; Vnukova, N. G.; Внукова, Наталья Григорьевна; Tomashevich, Y. V.; Томашевич, Евгений Владимирович; "Advanced Carbon Nanostructures", International Conference(11 ; 2013 ; July ; 1-5 ; Saint-Petersburg)
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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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Ignatchenko, V. A.
Spin waves in multilayers with different magnitudes of the magnetization, exchange, and anisotropy / V. A. Ignatchenko, D. S. Tsikalov // Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P. 71-74, DOI 10.4028/www.scientific.net/SSP.190.71 . - ISBN 1012-0394. - ISBN 9783037854365
Кл.слова (ненормированные):
Band gaps -- Magnonic crystals -- Rectangular and sinusoidal modulation -- Spin waves -- Superlattices -- Adjacent layers -- Magnetic parameters -- Magnon crystals -- Magnonic crystals -- Material parameter -- Sinusoidal modulation -- Spin-wave spectrum -- Energy gap -- Magnetic materials -- Spin waves -- Superlattices -- Multilayers
Аннотация: The spin-wave spectrum in one-dimensional magnon crystals - periodic superlattices (SLs) is investigated for the rectangular and sinusoidal modulation profile of the material parameters. The dependences of band gaps in the spectrum on both the difference of the magnetic parameters in adjacent layers and the ratio of the layer thicknesses are calculated. В© (2012) Trans Tech Publications.

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Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
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Investigation of transmittance and small-angle light scattering by monolayer of liquid crystal droplets with modified boundary conditions / V. A. Loiko [et al.] // Mol. Cryst. Liquid Cryst. - 2012. - Vol. 561, Is. 1. - P. 194-202, DOI 10.1080/15421406.2012.687237. - Cited References: 24 . - ISSN 1542-1406

РУБ Crystallography
Рубрики:
NEMATIC DROPLETS
   ANOMALOUS DIFFRACTION
   APPROXIMATION
   FILM
Кл.слова (ненормированные):
Light modulation -- light scattering -- polymer dispersed liquid crystal -- optical transmittance
Аннотация: A numerical method for modelling transmittance and angular distribution of light scattered by a Polymer Dispersed Liquid Crystal (PDLC) film, containing droplets with inhomogeneous boundary conditions, is proposed. It is based on the anomalous diffraction approximation and an interference approximation. The internal structures of nematic LC droplets are calculated on the basis of the free energy minimization problem solution using the relaxation method. The results for a monolayer of spherical LC droplets with modified boundary conditions caused by the local increase of the concentration of surface-active ions at the polymer-LC interface are discussed.

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Доп.точки доступа:
Loiko, V. A.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Konkolovich, A. V.; Misckevich, A. A.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Maschke, U.; International Topical Meeting: Optics of Liquid Crystals (14th ; Sept 25 - Oct 1, 2011 ; Yerevan, Armenia)
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Modulation of defect modes intensity by controlled light scattering in a photonic structure with a liquid-crystal component / V. A. Gunyakov [et al.] // Tech. Phys. Lett. - 2015. - Vol. 41, Is. 1. - P. 86-89, DOI 10.1134/S1063785015010241. - Cited References:20. - This study was supported in part by the Siberian Branch of the Russian Academy of Sciences (projects nos. 43 and 101) and by a Joint Project of the Siberian Branch of the Russian Academy of Sciences and the National Science Council of Taiwan. . - ISSN 1063. - ISSN 1090-6533. -

РУБ Physics, Applied
Рубрики:
SILICON
VOLTAGE
Аннотация: We describe a new method of defect modes intensity modulation in a multilayer photonic structure containing liquid crystal (LC) inclusions. The proposed method is based on using the regime of electroconvective instability in a nematic LC, which leads to the appearance of a scattered mode sensitive to the polarization type in the optical response. The defect mode intensity is controlled by variation of the angle between the initial planar orientation of the director and the polarization plane of light normally incident onto the photonic structure.

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Публикация на русском языке Модуляция интенсивности дефектных мод в фотонной структуре с жидкокристаллическим компонентом на основе управляемого светорассеяния [Текст] / В. А. Гуняков [и др.] // Письма в Журн. техн. физ. : Санкт-Петербургская издательская фирма "Наука" РАН, 2015. - Т. 41 Вып. 2. - С. 70–78

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

Доп.точки доступа:
Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович
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    Effects of composition modulation on the luminescence properties of Eu3+ doped Li1-xAgxLu(MoO4)2 solid-solution phosphors / F. Cheng [et al.] // Dalton Trans. - 2015. - Vol. 44, Is. 41. - P. 18078-18089, DOI 10.1039/c5dt02760h. - Cited References: 42. - The present work was supported by the National Natural Science Foundations of China (Grant No. 51272242, 51572023, 51511130035), Natural Science Foundations of Beijing (2132050), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), Beijing Youth Excellent Talent Program (YETP0635), the Funds of the State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (RERU2015022), and the excellent tutor section of the Fundamental Research Funds for the Central Universities of China University of Geosciences, Beijing (2-9-2015-028). This work was also partly supported by the Russian Foundation for Basic Research (Grant No. 15-52-53080 GFEN_a). . - ISSN 1477-9226
   Перевод заглавия: Влияние модуляции состава на люминесцентные свойства твердотельного люминофора Li1-xAgxLu(MoO4)2 допированного Eu3+

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
RED PHOSPHORS
   PHOTOLUMINESCENCE PROPERTIES
   ENERGY-TRANSFER
   WHITE LEDS
   IONS
   NA
   POLYMORPHISM
   TUNGSTATES
   RELAXATION
   MOLYBDATES
Аннотация: Double molybdate scheelite-type solid-solution phosphors Li1−xAgxLu1−y(MoO4)2:yEu3+ were synthesized by the solid state reaction method, and their crystal structures and luminescence properties were investigated in detail. The composition modulation and structural evolution of this series of samples were studied and the selected AgEu(MoO4)2, AgLu(MoO4)2, LiLu(MoO4)2 and LiEu(MoO4)2 phases were analyzed based on the Rietveld refinement. Depending on the variation of the Li/Ag ratio in Li1−xAgxLu1−y(MoO4)2:yEu3+ phosphors, the difference in the luminescence properties of Li1−xAgxLu1−y(MoO4)2:yEu3+ phosphors was ascribed to two factors, one reason could be assigned to the coupling effect and the nonradiative transition between the energy levels of LixAg1−xLu(MoO4)2 matrices and the activator Eu3+, another could be due to the near ultraviolet energy absorption and transmission efficiency between the charge-transfer (CT) band of O2−–Mo6+ and the 4f → 4f emissive transitions of Eu3+. The ultraviolet-visible diffuse reflection spectra (UV-vis DRS) and Raman spectra analysis were also used to verify the above mechanism.

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Держатели документа:
School of Materials Sciences and Technology, China University of Geosciences, Beijing, China
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, China

Доп.точки доступа:
Cheng, F.; Xia, Zhiguo; Molokeev, M. S.; Молокеев, Максим Сергеевич; Jing, X.
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Modulation of defect modes intensity by controlled light scattering in photonic crystal with liquid crystal domain structure / V. A. Gunyakov [et al.] // 15th Electromag. and Light Scattering Conf. (ELS-XV) : book of abstr. - 2015. - P. 140

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Доп.точки доступа:
Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович; Loiko, V. A.; Лойко В. А.; Electromagnetic and Light Scattering Conference(15 ; 2015 ; Jun. ; 21-26 ; Leipzig, Germany)
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10.

Ignatchenko, V. A.
Green’s functions of spin and electromagnetic waves in the sinusoidal superlattice / V. A. Ignatchenko, D. S. Tsikalov // Solid State Phenom. : Selected, peer reviewed papers. - 2015. - Vol. 233-234: Achievements in Magnetism. - P. 47-50, DOI 10.4028/www.scientific.net/SSP.233-234.47 . - ISSN 1662-9779. - ISSN 978-3-038
Кл.слова (ненормированные):
Continued fractions -- Electromagnetic waves -- Green’s functions -- Magnonic crystals -- Photonic crystals -- Sinusoidal modulation -- Spin waves -- Superlattices -- Circular waveguides -- Fourier transforms -- Green's function -- Photonic crystals -- Spin waves -- Superlattices -- Analytical expressions -- Continued fraction -- Fourier transformations -- Magnonic crystals -- S function -- Sinusoidal modulation -- Spectral representations -- Electromagnetic waves
Аннотация: The problem of finding the Green's function of spin and electromagnetic waves in the sinusoidal superlattice is considered. An analytical expression for the spectral representation of the Green's function has been found in the form of ascending continued fractions, the particular denominators of which are ordinary continued fractions. The Green’s function in the r -space has been found by the numerical Fourier transformation of the Greens’s function found in the spectral representation. © (2015) Trans Tech Publications, Switzerland.

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Доп.точки доступа:
Perov, N. \ed.\; Semisalova, A. \ed.\; Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(6 ; 2014 ; June-July ; Moscow)
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