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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) : Val'kov V. V., Aksenov S. V.
Заглавие : Andreev bound states and the Josephson current through a spin dimeric structur
Коллективы : "Spin Waves", International Simposium, Физико-технический институт им. А.Ф. Иоффе РАН
Место публикации : Spin Waves 2015, Int. Symp.: abstracts. - СПб., 2015. - P.126
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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) : Martynov S. N.
Заглавие : Antisymmetric Exchange in the CuB2O4 A Subsystem
Место публикации : JETP Letters. - 2009. - Vol. 90, Is. 1. - P.55-58. - ISSN 0021-3640, DOI 10.1134/S0021364009130116
Примечания : Cited References: 31
Предметные рубрики: TRANSVERSE MAGNETIC-FIELD
FLUCTUATION-INDUCED PHASE
COPPER METABORATE
ANTIFERROMAGNETIC CHAINS
SOLITON LATTICE
INDUCED GAP
SPIN-WAVES
BA2CUGE2O7
CSCUCL3
MNSI
Аннотация: The space distribution of the components of the microscopic Hamiltonian of the antisymmetric Dzyaloshinskii-Moriya exchange with respect to the exchange bond pairs of the A subsystem of Cu2+ ions in the crystallographic 4b positions of CuB2O4 has been obtained using symmetry analysis. The possibility of the coexistence of two different types of the exchange spatial distribution is demonstrated. The component of the anti-symmetric exchange vector D parallel to the tetragonal axis has a weakly ferromagnetic distribution for all of the directions of the bonds between the nearest magnetic neighbors. Each exchange bond has an additional component of the antisymmetric exchange parallel to the bond projection on the tetragonal plane. The spatial distribution of these components is helicoidal with the modulation vector in the tetragonal crystal plane.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrov K. S., Turchin P. P., Sorokin B. P., Karpovich A. A., Nefedov V. A.
Заглавие : Bulk acoustic waves propagation in Li2B4O7 piezoelectric crystals under the static uniaxial mechanical pressure
Коллективы : Annual frequency control symposium
Место публикации : Proceedings of the Annual IEEE International Frequency Control Symposium/ Annual frequency control symposium (54 ; 2000 ; Jun. ; 7-9 ; Kansas, MO). - 2000. - P.214-217. - ISBN 01616404
Примечания : Cited References: 8
Ключевые слова (''Своб.индексиров.''): acoustic wave transmission--acoustic wave velocity--elasticity--lithium compounds--mathematical models--permittivity--piezoelectricity--pressure effects--single crystals--electromechanical constants--piezoelectric crystal--piezoelectric materials
Аннотация: The influence of uniaxial mechanical stresses on bulk acoustic waves velocity in piezoelectric crystals Li2B4O7 has been investigated. Electromechanical constants have determined.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mankov Yu. I.
Заглавие : Bulk plasma waves in a randomly inhomogeneous conductor
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 7. - P.1323-1331. - ISSN 1063-7834, DOI 10.1134/S1063783412070268
Примечания : Cited References: 27
Предметные рубрики: VOLUME PLASMONS
DISPERSION
PLASMAVERLUSTES
SURFACE
Аннотация: The modification of the spectrum and damping of bulk plasma waves due to three-dimensional random inhomogeneities of the density of a degenerate electron gas in a conductor have been investigated using the averaged Green’s function method. The dependences of the frequency and damping of the averaged plasma waves, as well as the position ν m and width Δν of the peak of the imaginary part of the Fourier trans-form of the averaged Green’s function, on the wave vector k have been determined in the self-consistent approximation, which makes it possible to take into account multiple scattering of plasma waves by inhomogeneities. It has been found that, in the long-wavelength region of the spectrum, the decrease revealed in the frequency of the plasma waves is caused by the inhomogeneities, which agrees qualitatively with the behavior of the position of the peak ν m . In the range of large values of the correlation length of inhomogeneities and small values of k, the damping of the plasma waves tends to zero, whereas the width of the peak Δν remains finite, which is due to the nonuniform broadening. A comparison with the data of numerical calculations has been performed.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Burkov S. I., Zolotova O. P., Turchin P. P., Sorokin B. P., Aleksandrov K. S.
Заглавие : Calculation of thermostable directions and the influence of bias electricfield on the propagation of the Lamb and SH waves in langasite single crystalplates
Коллективы : IEEE International ultrasonics symposium
Место публикации : Proceedings - IEEE Ultrasonics Symposium. - 2010. - Ст.5935458. - P.1853-1856. - ISBN 1051, DOI 10.1109/ULTSYM.2010.5935458. - ISBN 9781457703829
Ключевые слова (''Своб.индексиров.''): dc electric field influence--lamb wave--sh-wave--thermostability--bias electric fields--dc electric field--lamb wave--langasite crystals--langasites--sh wave--single-crystal plates--temperature coefficient--thermostability--computer simulation--electromechanical coupling--shear waves--single crystals--ultrasonics--electric fields--electric fields--shear waves
Аннотация: Paper is presented the results of computer simulation. Effect of the dcelectric field influence on the propagation of Lamb and SH waves and itstemperature coefficients of delay in piezoelectric langasite crystal plate for alot of cuts and directions have been calculated. There were found the cutspossessing the thermostability and sufficient electromechanical coupling. В©2010 IEEE.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Pichugin K. N., Sadreev A. F.
Заглавие : Channel dropping via bound states in the continuum in a system of two nonlinear cavities between two linear waveguides
Место публикации : J. Phys.: Condens. Matter. - 2013. - Vol. 25, No. 39. - Ст.395304. - P. - ISSN 0953-8984, DOI 10.1088/0953-8984/25/39/395304
Ключевые слова (''Своб.индексиров.''): channel dropping--efficient channels--incident waves--linear waveguides--nonlinear cavities--numerical solution--parallel waveguides--two-dimensional photonic crystals--condensed matter physics--physics--waveguides
Аннотация: We show that two nonlinear resonant cavities aligned between two parallel waveguides can support self-induced bound states in the continuum (BSCs). These BSCs are symmetrical relative to an inversion of the waveguides and to inversion of the transport axis. Due to this BSCs can drop an incident wave from one waveguide to another with very high efficiency. We show also that the frequency of the efficient channel dropping can be tuned by injecting power. All these results are in good agreement with numerical solutions of the Maxwell equations in a two-dimensional photonic crystal of GaAs rods holding two parallel waveguides and two defects made of a Kerr medium. В© 2013 IOP Publishing Ltd.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov A.K., Myslivets S.A., Shalaev V.M.
Заглавие : Coherent nonlinear optics and quantum control in negative-index metamaterials
Коллективы : International Workshop on Theoretical and Computational Nano-Photonics
Место публикации : J. Opt. A-Pure Appl. Opt. - 2009. - Vol. 11, Is. 11. - ISSN 1464-4258, DOI 10.1088/1464-4258/11/11/114028
Примечания : Cited Reference Count: 27
Предметные рубрики: LEFT-HANDED METAMATERIALS
2ND-HARMONIC GENERATION
PARAMETRIC OSCILLATOR
3RD-HARMONIC GENERATION
MAGNETIC METAMATERIALS
COMPENSATING LOSSES
BACKWARD WAVE
Ключевые слова (''Своб.индексиров.''): nonlinear optics--metamaterials--coherent optical effects--backward waves--parametric--microamplifiers and oscillators--backward waves--coherent optical effects--metamaterials--microamplifiers and oscillators--nonlinear optics--parametric--backward waves--coherent energy transfer--coherent optical effects--control fields--control optical fields--laser induced--negative refractive index--negative-index--numerical experiments--parametric amplification--phase mismatch--quantum control--absorption--amplification--energy transfer--four wave mixing--metamaterials--optical materials--parametric oscillators--refractive index--transparency--optical parametric oscillators
Аннотация: The extraordinary properties of laser-induced transparency of a negative-index slab and parametric amplification for a backward wave signal are investigated. The effects of the idler absorption and phase mismatch on the amplification of the signal are studied, and the feasibility of ensuring robust transparency for a broad range of control field intensities and slab thicknesses is shown. A particular option consisting of the independent engineering of a strong four-wave mixing response and the negative refractive index is proposed and its specific features are investigated. The feasibility of quantum control over the slab transparency in such a scheme is confirmed through numerical experiments. We thus show opportunities and conditions for the compensation of the strong absorption inherent to plasmonic negative-index metamaterials, and we further show achievable transparency through coherent energy transfer from the control optical field to the negative-index signal.
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