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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Burkov S. I., Samkov A. V., Kholov A., Khafizov S.Kh., Shabanova L. A., Klevtsov P. V.
Заглавие : Acoustooptic and elastic properties of NaBi(WO4)2 and LiBi(MoO4)2crystals
Коллективы : Красноярский государственный университет
Место публикации : Russ. Ultrason./ изд. орг. . - 1988. - Vol. 18, Is. 3. - P.168-171. - ISSN 0048-8828
Ключевые слова (''Своб.индексиров.''): acoustooptical devices--materials--elasticity--lithium compounds--sodium compounds--acoustooptic properties--bulk acoustic waves--elastic properties--crystals
Аннотация: In recent years interest has been shown in crystals with the scheelite structure (point symmetry group 4/m) as promising materials for acoustooptic devices. However, nearly all the work done so far has been on the NaBi(MoO4)2 and PbMoO4 crystals. In this paper the authors give the results of a study of the elastic and acoustooptic properties of NaBi(WO4)2 and LiBi(MoO4)2 crystals from a series of isomorphic compounds with the scheelite structure carried out in order to determine the extent of the changes in the elastic and acoustooptic properties of this series of crystals when the structural elements are changed.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aksenov S. V.
Заглавие : Spin-dependent nonequilibrium transport in a quadruple quantum-dot device
Коллективы : Российская академия наук, Физико-технический институт им. А.Ф. Иоффе РАН, "Spin Waves", International Symposium
Место публикации : International Symposium "Spin Waves 2018": Program. - 2018. - Sec. 2: Spintronics. - 2-1
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Prodayvoda G. T.
Заглавие : The study of elastic symmetry and anisotropy of elastic body waves in gneiss
Место публикации : Geophysical Journal International. - 1994. - Vol. 119, Is. 3. - P.715-728. - ISSN 0956-540X
Ключевые слова (''Своб.индексиров.''): anisotropy--elastic properties--elastic symmetry--elastic wave velocity--gneiss--gneiss--phase velocity--polarization--ultrasonics--europe, baltic shield
Аннотация: Describes a method for determining the effective elastic constants of anisotropic rocks from the results of ultrasonic measurements of the phase velocity of elastic body waves with arbitrary directions of the wave normal in the absence of a priori information on the texture symmetry. The proposed method has been applied to the results of ultrasonic measurements of a twice-deformed gneiss sample from the Lodogian series of the Baltic Shield. Experimental findings conform to triclinic symmetry. -from Authors
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Turchin, Pavel P., Burkov, S. I., Turchin, Vladimir, I, Pletnev, Oleg N., Chulkova, Marina Yu, Nechepuryshina, Anastasia G.
Заглавие : Anisotropy of the electromechanical characteristics of SH-waves and Lamb waves in yttrium aluminum borate single crystals
Коллективы : Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0011]
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2022. - Vol. 15, Is. 1. - P.80-87. - ISSN 1997-1397, DOI 10.17516/1997-1397-2022-15-1-80-87; Журн. СФУ. Матем. и физика. - ISSN 2313-6022(eISSN)
Примечания : Cited References: 24. - The study was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (research project code FSRZ-2020-0011)
Аннотация: The anisotropy of the electromechanical properties of SH-waves and Lamb waves in yttrium aluminum borates, which are nonmagnetic representatives of the RMe3(BO3)4 single crystals family (where R=Y, La-Lu; M=Fe, Al, Cr, Ga, Sc) with unique properties of magnetoelectrics and multiferroics, has been studied. In the process of the numerical simulation of the acoustic waves characteristics, the values of linear electromechanical constants of YAl3(BO3)4 single crystals, previously measured by ultrasonic pulse echo and quasi-static methods, have been used.Исследована анизотропия электромеханичеких характеристик SH-волн и волн Лэмба в иттриевых алюмоборатах, которые являются немагнитным представителем семейства монокри- сталлов RMe3(BO3)4 (где R=Y, La-Lu; M=Fe, Al, Cr, Ga, Sc) с уникальными свойствами магнитоэлектриков и мультиферроиков. При численном моделировании характеристик акустических волн использованы значения линейных электромеханических постоянных монокристаллов YAl3(BO3)4, измеренных ранее ультразвуковым эхо-импульсным и квазистатическим методами.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pankrats A., Petrakovskii G. A., Tugarinov V., Temerov V.
Заглавие : Antiferromagnetic resonance and phase diagram of HoFe3(BO3)4
Коллективы : Российская академия наук, Физико-технический институт им. А.Ф. Иоффе РАН, "Spin Waves", International Symposium
Место публикации : International Symposium "Spin waves - 2009": Saint Petersburg, Russia, June 7-12, 2009 : Simposium program. Abstracts. - 2009. - С. 40
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S.
Заглавие : Formation of a spin density wave in copper metaborate by a spin polaron
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 2004. - Vol. 16, Is. 32. - P5907-5914. - ISSN 0953-8984, DOI 10.1088/0953-8984/16/32/023
Примечания : Cited References: 12
Предметные рубрики: SOLITON LATTICE
CUB2O4
Ключевые слова (''Своб.индексиров.''): absorption--correlation methods--electric fields--infrared radiation--magnetization--mathematical models--polarons--specific heat--intraband transition--optical conductivity--spin density waves--spin polaron--copper compounds
Аннотация: Formation of incommensurate three-dimensional magnetic order below T* similar to 10 K in CuB2O4 is explained on the basis of strong correlation between the holes and localized spins. The Kondo lattice model is analysed for the case where spin polarons are the elementary excitations. The origin of the low-temperature specific heat maximum at T similar to 5 K is associated with a displacement of the polaron band bottom. A set of anomalies in the temperature dependence of the conductivity, shift of the optical conductivity maximum in the range of energies 0.02-0.12 eV and decreasing of the infrared absorption intensity is predicted.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A., Timofeev I. V.
Заглавие : Effect of electromagnatically induced transparency on spectrum of defect modes of photonic crystal - art. no. 67292H
Коллективы : International Conference on Coherent and Nonlinear Optics
Место публикации : 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. - ISBN 0277-786X, DOI 10.1117/12.751966. - ISBN 978-0-8194-6886-4
Примечания : Cited References: 33
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
NONLINEAR OPTICS
COHERENT MEDIA
LIGHT
MICROCAVITIES
PULSES
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A.
Заглавие : Transmission and reflection spectra of a photonic crystal with a Raman defects
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 111, Is. 6. - P898-906. - ISSN 1063-7761, DOI 10.1134/S1063776110120022
Примечания : Cited References: 37. - This work was supported by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. NSh-7810.2010.3), the Presidium of the Russian Academy of Sciences (project no. 27.1), the Ministry of Education and Science of the Russian Federation (state contract no. 02.740.11.0220), and the Siberian Branch, Russian Academy of Sciences (integration project no. 5).
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
SLOW-LIGHT
NONLINEAR OPTICS
MICROCAVITIES
LASERS
AMPLIFIER
MODES
Ключевые слова (''Своб.индексиров.''): group velocities--high frequency hf--microwatts--nonlinear refractive index--one dimensional photonic crystal--probe field--pump intensities--raman gain--raman resonances--reflection spectra--spectral position--three level atoms--transmission spectrums--defects--dispersion (waves)--probes--pumping (laser)--pumps--refractive index--resonance--photonic crystals
Аннотация: Features of Raman gain of probe radiation in three-level atoms placed in a defect of a one-dimensional photonic crystal in the presence of laser radiation (pump) at an adjacent high-frequency transition have been theoretically investigated. It has been shown that there is a pump intensity range where narrow peaks (resonances) simultaneously appear in the transmission and reflection spectra of the probe field. Beyond this region, the peak in the transmission spectrum is transformed to a narrow dip. The spectral position of these peaks is determined by the Raman resonance and the transmittance and reflectance can be larger than unity at pump intensities from several microwatts per square centimeter to several tens of milliwatts per square centimeter. The nature of narrow peaks is due to a sharp dispersion of a nonlinear refractive index near the Raman resonance; this dispersion is responsible for a strong decrease in the group velocity of probe radiation. The proposed scheme makes it possible to obtain controlled ultranarrow resonances in the transmission and reflection spectra of the photonic crystal.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Tyurnev V. V.
Заглавие : Diffraction of electromagnetic waves on a one-dimensional strip conductor grating located at the interface between dielectric media
Коллективы : Ministry of Education and Science of the Russian Federation [14.607.21.0039]
Место публикации : Russ. Phys. J.: Springer, 2015. - Vol. 58, Is. 5. - P.646-657. - ISSN 1064-8887, DOI 10.1007/s11182-015-0546-1. - ISSN 15739228(eISSN)
Примечания : Cited References:17. - This work was supported in part by the Ministry of Education and Science of the Russian Federation (Agreement No. 14.607.21.0039).
Предметные рубрики: TRANSMISSION COEFFICIENTS
MULTILAYER STRUCTURE
BANDPASS-FILTERS
REFLECTION
Ключевые слова (''Своб.индексиров.''): electromagnetic waves--dielectric layers--strip conductors--diffraction
Аннотация: Analytical formulas are derived for the transmission and reflection coefficients of electromagnetic E- and H-waves incident at an arbitrary angle on a one-dimensional strip conductor grating located at the interface between two dielectric media. The feasibility of adjusting the grating reflectivity within wide limits by varying its design parameters is demonstrated, which allows these structures to be used in multilayered dielectric bandpass filters.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Tyurnev V. V.
Заглавие : Scattering of electromagnetic waves by a metal lattice placed at the interface of two media
Место публикации : J. Commun. Technol. Electron.: Maik Nauka-Interperiodica Publishing, 2017. - Vol. 62, Is. 7. - P.750-758. - ISSN 10642269 (ISSN), DOI 10.1134/S1064226917070026
Примечания : Cited References: 24
Ключевые слова (''Своб.индексиров.''): bandpass filters--electromagnetic waves--frequency bands--frequency response--optical multilayers--reflection--dielectric layer--efficient control--electromagnetic analysis--lattice periods--metal lattices--optical bandpass filters--scattering matrices--scattering of electromagnetic waves--electromagnetic wave scattering
Аннотация: Simple formulas for determination of components of the scattering matrix of a plane electromagnetic wave incident along the normal onto a thin infinite 2D metal lattice with square windows placed at the interface of two media are derived for the first time. Frequency responses (FRs) of this structure calculated with the use of these formulas agree well with responses obtained by the numerical electromagnetic analysis of a 3D model in the case when the lattice period is less than one-half of the wavelength. The capability of efficient control of the FR of the analyzed structure by means of variation in the width of conductors and the lattice period enables application of this lattice for fabrication of a reflector with prescribed reflectivity. Such reflectors at interfaces of dielectric layers are required, for example, in the design of multilayer sufaces radio transparent in a specified frequency band or optical bandpass filters.
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