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Общее количество найденных документов : 50
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1.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I.
Заглавие : Random quasi-phase-matching and nonlinear diffraction in nonlinear photonic crystal structures of strontium tetraborate : conference paper
Коллективы : Ultrafast optics conference (9; 2013 ; March; 2-8; Davos Congr. Center, Switzerland)
Место публикации : Ultrafast optics conference. - Davos, 2013. - Ст.Fr2.3
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2.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Trabs P., Noack F., Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Radionov N.V., Petrov V.
Заглавие : Generation of fs-pulses down to 121 nm by frequency doubling using random quasi-phase-matching in strontium tetraborate
Коллективы : Ultrafast optics conference (9; 2013 ; March; 2-8; Davos Congr. Center, Switzerland)
Место публикации : Ultrafast optics conference. - Davos, 2013. - Ст.Fr2.4
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3.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I., Trabs P., Noack F., Petrov V., Slabko V. V., Radionov N. V.
Заглавие : Nonlinear photonic crystals of strontium tetraborate: properties and radiation conversion to the VUV
Коллективы : "Modern problems of laser physics", International symposium
Место публикации : VI International symposium on modern problems of laser physics (MPLP'2013): [Proceedings]. - 2013. - Ст.B1. - P.197
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4.

Вид документа : Статья из журнала
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
Коллективы : International Conference on Coherent and Nonlinear Optics
Место публикации : Proc. of SPIE: SPIE-Int. Soc. Optical Engineering, 2011. - Vol. 7993. - Ст.799302. - P. - ISSN 0277-786X, DOI 10.1117/12.872943. - ISSN 978-0-81948-566-3
Примечания : Cited References: 9
Предметные рубрики: OPTICAL CRYSTALS
Ключевые слова (''Своб.индексиров.''): nonlinear photonic crystal--strontium tetraborate--second harmonic generation--random quasi phase matching
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 angstrom. 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 mu 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.
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5.

Вид документа : Статья из журнала
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 (5; 2011 ; Apr. ; 19-21; Prague, Czech Republic)
Место публикации : Proc. of SPIE: SPIE-Int. Soc. Optical Engineering, 2011. - Vol. 8071. - Ст.80710K. - ISSN 0277-786X, DOI 10.1117/12.886189. - ISSN 978-0-81948-661-5
Примечания : Cited References: 12
Предметные рубрики: CRYSTAL
Ключевые слова (''Своб.индексиров.''): nonlinear photonic crystal--strontium tetraborate--second harmonic generation--random quasi phase matching--ultrafast diagnostics
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 and spectral 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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6.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Vyunishev A. M., Zaitsev A. I.
Заглавие : Nonlinear photonic crystals of strontium tetraborate
Место публикации : Photonic Crystals: Fabrication, Band Struct. and Appl. - New York: Nova Science Publishers, 2011. - P.245-275. - ISBN 978-161668953-7
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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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Moiseev N. V., Popov P. A., Solomennik V. D., Zaitsev A. I., Cherepakhin A. V.
Заглавие : Heat capacity and thermodynamic properties of crystalline SrB4O7
Место публикации : Inorg. Mater.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 48, Is. 5. - P.504-507. - ISSN 0020-1685, DOI 10.1134/S0020168512050123
Примечания : Cited References: 24. - This work was supported in part by the RF President's Grants Council (grant no. NSh-4645.2010.2), the RF Ministry of Education and Science (analytical departmental targeted program Development of the Scientific Potential of Higher Education Institutions, grant no. RNP 2.1.1/10747), Bryansk State University (project no. 1.1.11), and the Physical Sciences Division of the Russian Academy of Sciences (Physics of Advanced Materials and Structures Program, project no. 2.5.2).
Предметные рубрики: STRONTIUM TETRABORATE
SINGLE-CRYSTALS
LUMINESCENCE
Аннотация: The heat capacity of a strontium tetraborate (SrB4O7) single crystal has been determined in the temperature range 55-300 K by adiabatic calorimetry, and its Debye characteristic temperature, entropy change, enthalpy increment, and phonon mean free path have been calculated as functions of temperature.
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8.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popov P. A., Solomennik V. D., Zaitsev A. I., Zamkov A. V., Gorev M. V.
Заглавие : Heat conductivity and thermal expansion of crystal strontium tetraborate SrB4O7
Место публикации : Dokl. Phys.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 57, Is. 2. - P.54-56. - ISSN 1028-3358, DOI 10.1134/S1028335812020036
Примечания : Cited References: 13. - This work was in part supported by a grant of the President of the Russian Federation (NSh-4645.2010.2), by the ABTsP "Development of the Scientific Potential of Higher Schools" (grant no. 2.1.1/10747), and by the Programs of OFN of the Russian Academy of Sciences "Physics of New Materials and Structures" (grant no. 2.5.2).
Аннотация: An experimental investigation of the heat conductivity and thermal expansion of an strontium tetraborate (SBO) crystal in wide temperature intervals was demonstrated. The single crystals used for manufacturing samples were grown by the Czochralski method from a melt with a stoichiometric ratio of components. The blend was synthesized from strontium carbonate and boric acid. The components were mechanically mixed in a carbon-glass bowl with the addition of a small amount of distilled water. The mixture was heated on a sandy bath to 60-90°C and shuffled with periodic addition of small portions of water until the carbonic-gas bubbles ceased to release. The growth of crystals was carried out on a seed oriented in the crystallographic direction b, and the extraction rate amounted to 2.4 mm/day over 6 days. the results obtained indicate the promising use of the SBO crystal matrix as a multifunctional optical material.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vyunishev A. M., Aleksandrovsky A. S., Zaitsev A. I., Slabko V. V.
Заглавие : Čerenkov nonlinear diffraction in random nonlinear photonic crystal of strontium tetraborate
Место публикации : Appl. Phys. Lett.: American Institute of Physics, 2012. - Vol. 101, Is. 21. - Ст.211114. - ISSN 0003-6951, DOI 10.1063/1.4767385
Примечания : Cited References: 29. - The work was supported by RFBR through the Grant No. 12-02-31167, by the Ministry of Education and Science of Russian Federation (Contract No. 14.B37.21.0730 and Grant No. 2.1.1/3455), by RAS Projects 24.29 and 24.31, by PSB RAS Projects 2.5.2 and 3.9.5, by SB RAS Projects 43 and 101, and by SFU Grant F12.
Предметные рубрики: POLED LITHIUM-NIOBATE
2ND-HARMONIC GENERATION
BARIUM NIOBATE
PULSES
Аннотация: Čerenkov-type second harmonic generation of femtosecond pulses in random one-dimensional nonlinear photonic crystal of strontium tetraborate is investigated experimentally and theoretically. Sidebands in angular-spectral dependence of generated second harmonic were detected and found to be in perfect agreement with calculations. Spectral maximum of generated radiation experiences deviation from Čerenkov relation due to influence of nonlinear photonic crystal structure. Pulse duration and local spectrum of Čerenkov second harmonic are measured and found to be in fair agreement with each other.
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10.

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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