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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zinenko V. I., Pavlovskii M. S., Zaitzev A. I., Krylov A. S., Shinkorenko A. S.
Заглавие : Vibrational spectra and elastic piezoelectric and polarization properties of the α-SrB4O7 crystal
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 115, Is. 3. - P.455-461. - ISSN 1063-7761, DOI 10.1134/S1063776112080195
Примечания : Cited References: 17. - 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.4828.12.2).
Предметные рубрики: STRONTIUM TETRABORATE
SRB4O7
Аннотация: The crystal lattice vibrational frequencies in the center of the Brillouin zone have been determined with the Raman spectroscopy method. The lattice vibrational frequencies, the phonon density of states, elastic and piezoelectric moduli, Born dynamic charges, and high-frequency dielectric constant have been calculated using the density functional method. All calculated quantities have been compared to the experimental data. A model of a nonpolar paraelectric phase for this compound, as well as a mechanism of the formation of domain in it, has been proposed. The polarization in the experimentally observed polar phase has been calculated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zaitsev A. I., Radionov N. V., Cherepakhin A. V., Vasiliev A. D., Zamkov A. V.
Заглавие : Morphology of the polar twin structure in Czochralski grown α-SrB4O7 crystals
Коллективы : Grant of the President of the Russian Federation for the support of leading scientific schools [SS-924.2014.2]
Место публикации : J. Cryst. Growth: Elsevier Science, 2015. - Vol. 416. - P.17-20. - ISSN 0022, DOI 10.1016/j.jcrysgro.2015.01.004. - ISSN 18735002(eISSN)
Примечания : Cited References:15. - This study is supported by Grant of the President of the Russian Federation for the support of leading scientific schools SS-924.2014.2.
Предметные рубрики: TETRABORATE
STRONTIUM
SRB4O7
Ключевые слова (''Своб.индексиров.''): optical microscopy--czochralski method--borates--growth twins--nonlinear--optic materials
Аннотация: The arrangement of a polar twin structure in Czochralski grown α-SrB4O7 crystals has been investigated. The transversal twin boundaries are stretched along [ 1 0 1 ] and [ 1 0 0 ] directions. The lateral twin boundaries are parallel to ( 0 1 0 ) plane. The twin structures have an extension up to centimeter size in all directions. Supposedly, they originate from polysynthetic polar microtwins revealed to form in ( 1 0 1 ¯ ) and ( 1 ¯ 0 1 ¯ ) growth pyramids. The dimensions, planarity and thickness stability of each individual twin are favorable for organizing quasi-phase matching conditions for nonlinear optical doubling of high-aperture beams.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trabs, Peter, Noack, Frank, Aleksandrovsky A. S., Zaitsev A. I., Radionov N. V., Petrov V.
Заглавие : Spectral fringes in non-phase-matched SHG and refinement of dispersion relations in the VUV
Место публикации : Opt. Express: Optical Society of America, 2015. - Vol. 23, Is. 8. - P.10091-10096. - ISSN 1094-4087, DOI 10.1364/OE.23.010091
Примечания : Cited References:11
Предметные рубрики: 2ND-HARMONIC GENERATION
CRYSTAL
STRONTIUM
SrB4O7
Аннотация: We consider second harmonic generation (SHG) of ultrashort pulses in the case of strong phase- and group-velocity mismatch. Spectral fringes appear in the second harmonic related to two delayed replicas of the fundamental pulse in the time domain. The fringe separation can be used to evaluate the group-velocity and refractive index of nonlinear crystals at extreme wavelengths. Experimental results with femtosecond pulses in SrB4O7 (SBO) are used to refine the Sellmeier equation describing the nc refractive index down to 160 nm, essential for the use of this unique nonlinear crystal for random quasi-phase-matching in the VUV.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Trabs, Peter, Noack, Frank, Aleksandrovsky A. S., Zaitsev A. I., Petrov, Valentin
Заглавие : Generation of coherent radiation in the vacuum ultraviolet using randomly quasi-phase-matched strontium tetraborate
Место публикации : Opt. Lett.: Optical Society of America, 2016. - Vol. 41, Is. 3. - P.618-621. - ISSN 0146-9592, DOI 10.1364/OL.41.000618. - ISSN 1539-4794(eISSN)
Примечания : Cited References:15
Предметные рубрики: Crystal
SrB4O7
nm
Аннотация: Tunable coherent radiation is generated in the vacuum ultraviolet down to 121 nm using random quasi-phase matching in strontium tetraborate, the shortest wavelength ever produced with a second-order nonlinear optical process in a solid-state material. Relevant properties of this radiation, the nonlinear process, and the nonlinear crystal are investigated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Ikonnikov A. A., Pospelov G. I.
Заглавие : Ultrashort pulses characterization by nonlinear diffraction from virtual beam
Место публикации : Appl. Phys. Lett.: AMER INST PHYSICS, 2011. - Vol. 98, Is. 6. - Ст.61104. - ISSN 0003-6951, DOI 10.1063/1.3554370
Примечания : Cited References: 14. - The work was supported by Ministry of Education and Science of Russian Federation (Contract No. 16.740.11.0150); Grant of President of Russian Federation for support of leading scientific schools Grant No. SS-4645.2010.2; Grant No. RNP.2.1.1.3455 and Projects 2.5.2 and 3.9.1 of PSB RAS; and Projects Nos. 27.1 and 5 of SB RAS. A. M. Vyunishev is grateful for support from Carl Zeiss Grant and from Krasnoyarsk Regional Fund of Science and Technical Activity Support.
Предметные рубрики: CRYSTAL
SRB4O7
Ключевые слова (''Своб.индексиров.''): broad spectral--frequency-doubling--noncollinear--nonlinear diffraction--nonlinear photonic crystals--short-wavelength--tetraborate--ultrafast diagnostics--diffraction--light propagation--strontium--ultrashort pulses--photonic crystals
Аннотация: Noncollinear frequency doubling in a random nonlinear photonic crystal of strontium tetraborate via nonlinear diffraction from virtual beam is investigated. This effect is shown to be useful for ultrashort pulses characterization in broad spectral range. Nonlinear photonic crystals of strontium tetraborate are a promising medium for ultrafast diagnostics in short-wavelength applications. (C) 2011 American Institute of Physics. [doi:10.1063/1.3554370]
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zaitsev A. I., Zamkov A. V., Molokeev M. S., Cherepakhin A. V., Koroleva N. S.
Заглавие : Phase formation upon crystallization of SrO center dot 2B(2)O(3) glasses
Место публикации : Crystallogr. Rep. - NEW YORK: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 56, Is. 1. - С. 44-51. - JAN. - ISSN 1063-7745, DOI 10.1134/S1063774511010263
Примечания : Cited Reference Count: 21
Предметные рубрики: STRONTIUM TETRABORATE
LUMINESCENCE
SRB4O7
GROWTH
Ключевые слова (''Своб.индексиров.''): crystalline form--crystalline formation--crystalline phasis--glass surfaces--phase formations--thermal analysis--thermal stability--crystalline materials--crystallization--glass--thermoanalysis--thermodynamic stability--metastable phases
Аннотация: The crystallization of SrO center dot 2B(2)O(3) glasses has been studied. Four different crystalline formations were found to form simultaneously and independently on the glass surface: stable alpha-SrB4O7 crystals and metastable crystalline forms (beta-SrB4O7, Sr4B14O25, and spherulites (presumably, mixtures of crystalline phases)). The ranges of thermal stability of the newly formed metastable phases have been established using thermal analysis.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasiliev, Alexander D., Cherepakhin, Alexander V., Zaitsev, Alexander I.
Заглавие : The trigonal polymorph of strontium tetraborate, beta-SrB4O7
Место публикации : Acta Crystallogr. Sect. E.-Struct Rep. Online. - MALDEN: WILEY-BLACKWELL, 2010. - Vol. 66, Part 6. - С. I48-U132. - JUN. - ISSN 1600-5368, DOI 10.1107/S1600536810019069
Примечания : Cited Reference Count: 22. - Гранты: We thank the State Program for Support of Leading Scientific Schools (grant LS-4645.2010.2.)Финансирующая организация: Leading Scientific Schools [LS-4645.2010.2]
Предметные рубрики: CRYSTAL-STRUCTURE
SRB4O7
LUMINESCENCE
MODEL
Ключевые слова (''Своб.индексиров.''): tetra
Аннотация: The asymmetric unit of the title compound, beta-SrB4O7, contains five Sr atoms (three located on a threefold rotation axis), twelve B and 21 O atoms. The structure is made up from BO3 triangles and BO4 tetrahedra in a 1:1 ratio. Pairs of BO3 triangles are linked to BO4 tetrahedra via common corners, forming chains. These chains are further linked to adjacent chains through corner-sharing, leading to a three-dimensional framework with channels running parallel to [001]. The Sr2+ ions reside in the channels and exhibit strongly distorted polyhedra The density of the beta-polymorph is considerably lower than that of beta-SrB4O7, which is constructed solely from BO4 tetrahedra.
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