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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A.S., Vyunishev A.M., Zaitsev A.I., Slabko V.V.
Заглавие : Random quasi-phase-matched conversion of broadband radiation in a nonlinear photonic crystal
Место публикации : Phys. Rev. A. - 2010. - Vol. 82, Is. 5. - ISSN 1050-2947, DOI 10.1103/PhysRevA.82.055806
Примечания : Cited Reference Count: 22. - Гранты: The work was supported by the Ministry of Education and Science of the Russian Federation (Contract 16.740.11.0150), Grant of the President of the Russian Federation for the support of leading scientific schools No. SS-4645.2010.2, Grant No. RNP.2.1.1.3455, Projects 2.5.2 and 3.9.1 of PSB RAS, and Projects No. 27.1 and No. 5 of SB RAS. A. M. Vyunishev is grateful for the support from Krasnoyarsk Regional Fund of Science and Technical Activity Support.Финансирующая организация: Ministry of Education and Science of the Russian Federation [16.740.11.0150]; Russian Federation for the support of leading scientific schools [SS-4645.2010.2, RNP.2.1.1.3455]; PSB RAS [2.5.2, 3.9.1]; SB RAS [27.1, 5]; Krasnoyarsk Regional Fund of Science and Technical Activity
Ключевые слова (''Своб.индексиров.''): broad spectrum--broadband radiation--femtosecond laser pulse--fundamental wave--nonlinear generation--nonlinear photonic crystals--quasi-phase-matched--quasi-phase-matched frequency doubling--red shift--shorter wavelength--tetraborate--tuning ranges--vacuum ultraviolets--band structure--crystal structure--strontium--ultrafast lasers--ultrashort pulses--photonic crystals
Аннотация: Radiation in the range 187.5-215 nm was generated via random quasi-phase-matched frequency doubling of femtosecond laser pulses in nonlinear photonic crystals of strontium tetraborate. Abroad spectrum of fundamental radiation favors the probing of the nonlinear photonic crystal band structure. The red shift of the band structure upon the fundamental wave-vector rotation was observed. No principal limitations of the tuning range at its shorter wavelength boundary from the nonlinear photonic crystal (NPC) material are found. Calculation shows that the NPC structure enables enhancement of nonlinear generation in the vacuum ultraviolet.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Ikonnikov A. A., Pospelov G. I., Slabko V. V.
Заглавие : Nonlinear optics of randomly structured strontium tetraborate
Коллективы : Conference on Lasers and Electro-Optics Europe, European Quantum Electronics Conference
Место публикации : CLEO/Europe-EQEC 2011: IEEE, 2011. - С. 84
Аннотация: Strontium tetraborate (SBO) is attractive for nonlinear optics of short-wavelength range including VUV due to its transparency window [1]. Nonlinear coefficients of SBO are the largest among crystals transparent below 270 nm. Angular phase matching is, however, absent in SBO, and the only possibility of conversion enhancement is to employ self-organized random nonlinear photonic crystal (NPC) structures discovered in SBO. These NPC are capable of two limiting cases of phase matching, namely, nonlinear diffraction (NLD) and random quasi phase matching (RQPM). NLD allows detection of NPCs and testing their reciprocal superlattice vectors (RSV) spectra via variation of the incidence angle. NLD conversion of broadband fs pulses of modest power from Ti:S oscillator results in 1.9% efficiency, being, to our knowledge, the best result obtained for this type of phase matching. RSV spectrum is wide enough to ensure NLD tunability from 355 to 510 nm. This spectrum is not flat, but the narrowing of the generated radiation spectrum due to non-flatness is rather modest.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Ikonnikov A.A., Pospelov G.I., Slabko V.V., Zhokhova A.A.
Заглавие : Deep UV generation and fs pulses characterization using strontium tetraborate
Коллективы : Nonlinear Optics and Applications
Место публикации : Nonlinear Optics and Applications V: Proceedings of the SPIE. - 2011. - С. 36. - (SPIE Optics + Optoelectronics)
Аннотация: The properties of NPC structures in strontium tetraborate are analyzed. Different types of NPC structures are revealed that possess different nonlinear properties, and their spectral dependences of frequency conversion efficiency are calculated and compared. Experimental study of these structures is reported for the process of doubling of the second harmonic of fs Ti:S laser. Tuning of generated radiation is obtained in the range 187.5 - 232.5 nm, with extreme insensitivity to the angular orientation of NPC. Behavior of tuning curve along investigated fundamental wave range is similar in all studied samples, but efficiency obtained depends on the type of structure. Conversion efficiency andspectral quality of generated radiation is experimentally shown to grow better when using NPC with improved structure. Prospects of VUV converter on a single NPC are discussed. NPCs of SBO are demonstrated to be useful for autocorrelation diagnostics both in random QPM geometry and in the geometry of nonlinear diffraction from virtual beam.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrovsky A.S., Vyunishev A.M., Zaitsev A.I., Rovsky V.E., Slabko V.V., Cherepakhin. A.V.
Заглавие : Nonlinear Photonic Crystals of Strontium Tetraborate: Properties and Conversion of Radiation
Место публикации : Proc. SPIE. - 2010. - Vol.7728. - С. 772819-1–772819-8
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Zaitsev A. I., Cherepakhin A. V., Vyunishev A. M., Rovsky V. E., Slabko V. V.
Заглавие : Nonlinear photonic crystals of strontium tetraborate: Properties and conversion of radiation
Место публикации : Proceedings of SPIE - The International Society for Optical Engineering. - 2010. - Vol. 7728: Nonlinear Optics and Applications IV (12 April 2010 through 15 April 2010, Brussels, ) Conference code: 81010. - ISBN 0277786X (ISSN); 9780819482013 (ISBN), DOI 10.1117/12.853713
Ключевые слова (''Своб.индексиров.''): nonlinear photonic crystal--second harmonic generation--strontium tetraborate--as-grown--average power--domain shape--efficiency enhancement--femtoseconds--fourth harmonics--nonlinear diffraction--nonlinear optical process--nonlinear photonic crystals--quasi-phase-matched--second harmonic generation--tetraborate--ti: sapphire laser--ti:sapphire oscillators--ferroelectricity--harmonic analysis--nonlinear optics--optical materials--photonic crystals--sapphire--strontium--harmonic generation
Аннотация: Random nonlinear photonic crystal (NPC) structures formed by as-grown domains in a non-ferroelectric strontium tetraborate (SBO) are investigated. The domain shape and orientation are similar to those in ferroelectric KTP. Nonlinear diffraction is the simplest way to detect, evaluate and characterize these structures. Reciprocal superlattice vectors spectra of NPC in SBO are very wide and enable broadband efficiency enhancement of nonlinear optical processes. Second harmonic (SH) generation of femtosecond Ti:sapphire oscillator radiation with 1.9% efficiency is obtained using nonlinear diffraction geometry. Random quasi phase matched generation at the wavelengths of fourth harmonic of Ti:sapphire laser is obtained with average power up to 1 ?W. © 2010 Copyright SPIE - The International Society for Optical Engineering.
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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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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shinkorenko A. S., Zinenko V. I., Pavlovskii M. S.
Заглавие : Ab initio investigation of physical properties and phase diagram of magnetic tetraborate crystals M+2B4O7
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст.K.P20. - P.354. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 4
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shinkorenko A. S., Pavlovskii M. S., Zinenko V. I.
Заглавие : Calculation of the electronic structure, lattice dynamics, and optical and magnetic properties of europium tetraborate EuB4O7
Место публикации : Phys. Solid State: Maik Nauka-Interperiodica Publishing, 2016. - Vol. 58, Is. 11. - P.2300-2306. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783416110329
Примечания : Cited References: 20
Аннотация: The electronic band structure, lattice vibration frequencies, and optical and magnetic properties of EuB4O7 crystal with α-SrB4O7-type structure are calculated within the density functional method. It is found that this compound is a dielectric with a band gap of the order of 4 eV. It is found that the ground state of this crystal is the state with ferromagnetic ordering of Eu2+ spins. Exchange interaction constants are calculated; the ferromagnetic ordering temperature is estimated within the molecular field approximation (Tc ≈ 1 K). The EuB4O7 compound is a magnetic pyroelectric and, hence, can exhibit magnetoelectric properties. The calculated polarization change during ferromagnetic ordering of this crystal is 3973 μC/m2. © 2016, Pleiades Publishing, Ltd.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Krylov A. S., Moshkina E. M., Sofronova S. N., Gudim I. A., Temerov V. L., Vtyurin A. N.
Заглавие : Investigation of structural and magnetic phase transitions in multiferroic rare-earth tetraborate crystals with huntite structure by Raman spectroscopy
Коллективы : Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, International Workshop on Relaxor Ferroelectrics
Место публикации : Joint 13th Russia/CIS/Baltic/Japan Symp. on Ferroelectricity and Int. Workshop on Relaxor Ferroelectrics (RCBJSF-IWRF 2016): book of abstracts. - 2016. - Ст.Oral-15
Примечания : References: 4
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A.S.
Заглавие : Nonlinear photonic crystals of strontium tetraborate
Коллективы : "Nonlinear Photonics: Theory, Materials and Applications", Int. Workshop
Место публикации : International Workshop "Nonlinear photonics: theory, materials, applications" (NLP-2011): Book of Abstracts. - 2011. - С. 40
Аннотация: Structural, optical and nonlinear optical properties of strontium tetraborate (SBO) single crystals are summarized. SBO presently is not considered to be a ferroelectric, however, domain structures consisting of alternating oppositely poled domains, strongly resembling those present in such ferroelectrics as potassium titanyl phosphate and lithium niobate, were recently discovered in this crystal. Such geometrical properties as orientation, size, and degree of randomization, of these domain structures are described. The problem of origin of domain structures in SBO is considered, as well as the possibility of their characteristics control. From the point of view of optical properties, domain-structured samples of strontium tetraborate are classified as randomized nonlinear photonic crystals. Comparative study of nonlinear diffraction and random quasi-phase-matching of nanosecond and femtosecond laser pulses in these nonlinear photonic crystals is presented. Prospects of creation of nonlinear optical converters of laser radiation into VUV spectral region based on domain structured strontium tetraborate are discussed.
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11.

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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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A.S., Vyunishev A.M., Zaitsev A.I., Ikonnikov A.A., Pospelov G.I., Slabko V.V.
Заглавие : Phase matched conversion of radiation in nonlinear photonic crystals of strontium tetraborate
Место публикации : Proceedings of SPIE - The International Society for Optical Engineering. - 2011. - Vol. 7993: ICONO 2010: International Conference on Coherent and Nonlinear Optics (23 August 2010 through 26 August 2010, Kazan, ) Conference code: 83828. - ISBN 0277786X (ISSN); 9780819485663 (ISBN), DOI 10.1117/12.872943
Ключевые слова (''Своб.индексиров.''): nonlinear photonic crystal--random quasi phase matching--second harmonic generation--strontium tetraborate--average power--deep uv--enhancement factor--fs pulse--monodomains--nonlinear photonic crystals--quasi-phase-matched frequency doubling--radiation source--random quasi phase matching--rotational shift--second harmonic generation--tetraborate--tuning ranges--band structure--harmonic generation--nonlinear optics--optical materials--phase matching--quantum optics--strontium--photonic crystals
Аннотация: Random quasi-phase-matched frequency doubling of fs pulses to the deep UV was obtained in 1D nonlinear photonic crystal (NPC) of strontium tetraborate. Tuning range of generated radiation is from 187.5 to 215 nm. The spectrum of generated radiation consists from series of peaks with the width of order of 1 A. These peaks are the manifestation of the NPC band structure. Using fs oscillator as the fundamental radiation source, maximum average power of generated radiation is of order 1 ?W, the enhancement factor with respect to monodomain sample being of order of several hundred. The red rotational shift of NPC band structure is experimentally demonstrated. © 2011 SPIE.
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13.

14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Shakhura I. E., Vyunishev A. M., Zaitsev A. I., Zamkov A. V.
Заглавие : Nonlinear optical processes in randomized domain structures of strontium tetraborate
Место публикации : International Conference "Laser Optics 2008" June 23-28, 2008, St.Petersburg, Russia, p.55
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15.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Shakhura I. E, Vyunyshev A. M., Zaitsev A. I., Zamkov A. V.
Заглавие : Nonlinear photonic crystals of strontium tetraborate
Коллективы : "Modern problems of laser physics", International Symposium, "Современные проблемы лазерной физики", Международный симпозиум
Место публикации : V International Symposium "Modern problems of laser physics": Technical digest : Novosibirsk, Russia, 24-30 August, 2008/ "Modern problems of laser physics", International Symposium (5 ; 2008 ; Aug ; Novosibirsk). - 2008. - p.206
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16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Shakhura I. E., Zaitsev A. I., Zamkov A. V.
Заглавие : Nonlinear diffraction and random QPM in strontium tetraborate
Коллективы : International Conference on Advanced Optoelectronics and Lasers
Место публикации : Proceedings of CAOL 2008 : 4th International Conference on Advanced Optoelectronics and Lasers. - Alushta, Crimea, 2008. - С. 398-400. - ISBN 9781424419746 (ISBN), DOI 10.1109/CAOL.2008.4671848 (Шифр 15013520)
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Vyunyshev A. M., Aleksandrovsky A. S., Shakhura I. E., Zaitsev A. I., Zamkov A. V.
Заглавие : Second harmonic generation in randomized domain structure of strontium tetraborate
Коллективы : "Modern problems of laser physics", International Symposium, "Современные проблемы лазерной физики", Международный симпозиум
Место публикации : V International Symposium "Modern problems of laser physics": Technical digest : Novosibirsk, Russia, 24-30 August, 2008/ "Modern problems of laser physics", International Symposium (5 ; 2008 ; Aug ; Novosibirsk). - 2008. - p.226
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shakhura I. E, Aleksandrovsky A. S., Vyunyshev A. M., Zaitsev A. I., Zamkov A. V.
Заглавие : Random quasi phase matching in domain structure of strontium tetraborate crystals
Коллективы : "Modern problems of laser physics", International Symposium, "Современные проблемы лазерной физики", Международный симпозиум
Место публикации : V International Symposium "Modern problems of laser physics": Technical digest : Novosibirsk, Russia, 24-30 August, 2008/ "Modern problems of laser physics", International Symposium (5 ; 2008 ; Aug ; Novosibirsk). - 2008. - p.219-220
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Shakhura I. E., Vyunishev A. M., Zaitsev A. I., Zamkov A. V.
Заглавие : Nonlinear diffraction and random QPM in strontium tetraborate
Место публикации : 4th International Conference on Advanced Optoelectronics and Lasers (CAOL 2008), Sept. 29 2008-Oct. 4, 2008,Alushta, Crimea, Ukraine, p.398
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Shakhura I. E., Zaitsev A. I., Zamkov A. V.
Заглавие : Random quasi-phase-matching in a nonlinear photonic crystal structure of strontium tetraborate
Место публикации : PHYS. REV. A: APS, 2008. - P.031802-1-031802-4. - DOI 10.1103/PhysRevA.78.031802
Примечания : Библиогр.: 20. - This work was supported by RFBR Grant No. 02-07-00497, Grants of the President of the Russian Federation for the support of leading scientific schools No. SS-1011.2008.2 and No. SS-3818.2008.3 , Grant No. RNP.2.1.1.1814, and the Interdisciplinary Integration project of SB RAS 33.
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