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Aleksandrovsky, A. S.
Random quasi-phase-matching and nonlinear diffraction in nonlinear photonic crystal structures of strontium tetraborate : conference paper / A. S. Aleksandrovsky, A. M. Vyunishev, A. I. Zaitsev // Ultrafast optics conference. - Davos, 2013. - Ст. Fr2.3

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр Иванович; Александровский, Александр Сергеевич; Ultrafast optics conference (9 ; 2013 ; March; 2-8 ; Davos Congr. Center, Switzerland)
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Deep UV generation and fs pulses characterization using strontium tetraborate / A. S. Aleksandrovsky [et al.] ; ed. V. V. Slabko // Proc. of SPIE. - 2011. - Vol. 8071. - Ст. 80710K, DOI 10.1117/12.886189. - Cited References: 12 . - ISSN 0277-786X. - ISSN 978-0-819

РУБ Optics
Рубрики:
CRYSTAL
Кл.слова (ненормированные):
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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Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр Иванович; Ikonnikov, A. A.; Pospelov, G. I.; Slabko, V. V.; Слабко, Виталий Васильевич; Zhokhova, A. A.; Slabko, V. V. \ed.\; Nonlinear Optics and Applications (5 ; 2011 ; Apr. ; 19-21 ; Prague, Czech Republic)
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Generation of fs-pulses down to 121 nm by frequency doubling using random quasi-phase-matching in strontium tetraborate / P. Trabs [et al.] // Ultrafast optics conference. - Davos, 2013. - Ст. Fr2.4

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Держатели документа:
Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy, 2A Max-Born-Str., D-12489 Berlin, Germany
L. V. Kirensky Institute of Physics, Akademgorodok, Krasnoyarsk 660036, Russia and Siberian Federal University, Krasnoyarsk 660079, Russia

Доп.точки доступа:
Trabs, P.; Noack, F.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев, Александр Иванович; Radionov, N.V.; Petrov, V.; Ultrafast optics conference (9 ; 2013 ; March; 2-8 ; Davos Congr. Center, Switzerland)
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    Growth, Structure, and Optical Properties of Nonlinear LiGa0.55In0.45Te2 Single Crystals / P. Krinitsin [et al.] // Cryst. Growth Des. - 2019. - Vol. 19, Is. 3. - P. 1805-1814, DOI 10.1021/acs.cgd.8b01788. - Cited References: 43. - This work was supported by state assignment project #0330-2016-0008 and partially by the Russian Foundation of Basic Research (Grant Nos. 15-02-03408a, 17-45-540775r_a, and 17-52-53031), national scientific foundations of China (Grant Nos. 11474292, 51702330, 11611530680, 91622118, and 91622124), the special foundation of the director of Technical Institute of Physics and Chemistry (TIPC), the China "863" project (No. 2015AA034203) and the Youth Innovation Promotion Association, CAS (outstanding member for Z.L. and Grant 2017035 for X.J.). Some part of the experiments was performed in the multiple-access center "High-Resolution Spectroscopy of Gases and Condensed Matter" at the IA&E SBRAS (Novosibirsk, Russia). The authors are grateful to N. F. Beisel from the Analytical laboratory of the Nikolaev Institute of Inorganic Chemistry SB RAS for atomic-emission spectral analysis of the studied crystals. . - ISSN 1528-7483. - ISSN 1528-7505
   Перевод заглавия: Синтез, структура и оптические свойства нелинейнооптического кристалла LiGa0.55In0.45Te2

РУБ Chemistry, Multidisciplinary + Crystallography + Materials Science, Multidisciplinary
Рубрики:
PHASE-MATCHING PROPERTIES
ELECTRONIC-STRUCTURE
MID-IR
Аннотация: In search of new nonlinear optical crystals for the mid-IR range, we grew single crystals of LiGa0.55In0.45Te2 (LGITe) of optical quality; its structure was established, and the spectroscopic properties were studied. LGITe crystallizes in a tetragonal chalcopyrite-like (I4̅2d) structure at 667 ± 5 °C. Crystals are transparent in the 0.76–14.8 μm spectral region with some absorption bands related to OH/H2O and Ge–O vibrations. Analysis of the Tauc plots showed that LGITe is a direct band gap semiconductor with the band gap Eg = 1.837 eV at 300 K. The Raman spectrum for LGITe is very similar to that for LiGaTe2: the most intense band A1 near 120 cm–1 corresponds to the Li–Te vibration. DFT calculations were carried out for the first time to simulate the energy band structure (band gap ∼1.67 eV), density of states (DOS), birefringence (0.049 at 2 μm), and nonlinear susceptibility (d14 = d36 = −48.73 pm/V). For ternary LiInTe2 these parameters are Δn = 0.007 and d14 = d36 = −61.4 pm/V, respectively. The calculated optical properties indicate that LiGa0.55In0.45Te2 is a promising mid-IR nonlinear optical crystal with nonlinear parameters higher than those of LiGaTe2.

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Держатели документа:
Sobolev Inst Geol & Mineral SB RAS, 3 Ac Koptyug Ave, Novosibirsk 630090, Russia.
Novosibirsk State Univ, 2 Pyrogova Str, Novosibirsk 630090, Russia.
Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Univ Chinese Acad Sci, Beijing 100190, Peoples R China.
Inst Automat & Electrometry SB RAS, Novosibirsk 630090, Russia.

Доп.точки доступа:
Krinitsin, Pavel; Yelisseyev, Alexander; Jiang, Xingxing; Isaenko, Lyudmila; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lin, Zheshuai; Pugachev, Alexey; Russian Foundation of Basic Research [15-02-03408a, 17-45-540775r_a, 17-52-53031]; national scientific foundations of China [11474292, 51702330, 11611530680, 91622118, 91622124]; special foundation of the director of Technical Institute of Physics and Chemistry (TIPC); China "863" project [2015AA034203]; Youth Innovation Promotion Association, CAS [2017035]; [0330-2016-0008]
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Microstrip diplexer with Π-shaped matching circuit / A. A. Leksikov [et al.] // Prog. Electromagn. Res. Lett. - 2020. - Vol. 88. - P. 59-65, DOI 10.2528/PIERL19083005. - Cited References: 15. - The work is supported by the Ministry of science and highest education of the Russian Federation (contract #03.G25.31.0279). . - ISSN 1937-6480
Кл.слова (ненормированные):
Geometry -- Microstrip devices -- Timing circuits -- 1-D models -- Central frequency -- Compact size -- Fractional bandwidths -- Frequency-dependent couplings -- Matching circuit -- Microstrip diplexer -- Strip conductors -- Multiplexing equipment
Аннотация: We propose a new method to match diplexer channels with a common port in which a Π-shaped strip conductor is used as a matching circuit. The applicability of the method is illustrated by simulating and fabricating a microstrip diplexer for GPS/GLONASS applications. The central frequencies of the channels are 1.234 GHz and 1.597 GHz, and their fractional bandwidths are 6.8% and 7.3%, respectively; minimum insertion losses are 1.05 dB and 1.08 dB. The main advantage of the diplexer is its compact size: 16.8 mm × 9.0 mm × 6.4 mm in housing. Using 1D models and a quasi-TEM approach, the frequency-dependent coupling coefficients between the matching circuit and input resonators of the channels are calculated, and the influence of the matching circuit’s geometrical parameters on its coupling with diplexer channels is studied. © 2020, Electromagnetics Academy. All rights reserved.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Leksikov, A. A.; Лексиков, Александр Александрович; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Govorun, I. V.; Говорун, Илья Валерьевич; Afonin, A. O.; Афонин, Алексей Олегович; Ugryumov, A. V.; Угрюмов, Андрей Витальевич; Leksikov, An. A.; Лексиков, Андрей Александрович
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Microwave-assisted synthesis of the new solid-solution (V1–xCrx)2GaC (0 ≤ x ≤ 1), a Pauli paramagnet almost matching the Stoner criterion for x = 0.80 / N. Kubitza, R. Xie, I. Tarasov [et al.] // Chem. Mater. - 2023. - Vol. 35, Is. 11. - P. 4427-4434, DOI 10.1021/acs.chemmater.3c00591. - Cited References: 54. - This work has been supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within CRC/TRR 270, projects B03 and B02, A05 (Project-ID 405553726) . - ISSN 0897-4756. - ISSN 1520-5002
Аннотация: MAX phases that exhibit long-range magnetic order in the bulk are still very hard to synthesize. Chromium and manganese are the cutoff elements when transitioning through the 3dmetals that still form stable full and doped MAX phases, respectively. An iron-based (on the M-site) bulk MAX phase does not exist. Therefore, other strategies to induce long-range magnetic ordering in bulk MAX phases are necessary to open the path to new functional materials. Here, we demonstrate the nonconventional synthesis of a hitherto unknown MAX phase solid-solution (V1–xCrx)2GaC by microwave heating. The full series with 0 ˂ x ˂ 1 (x = 0.20, 0.40, 0.50, 0.60, 0.80) forms almost single phase with minimal differences in their morphology. Their magnetic properties, however, differ rather significantly, with a maximum susceptibility around x = 0.80. Both the experimental and theoretical/ab initio magnetic analysis confirm that the solid-solution (V1–xCrx)2GaC is an itinerant Pauli paramagnet that almost fulfills the Stoner criterion for ferromagnetic order (for compositions with x around 0.80). This is a powerful insight into how chemical composition couples with electronic structure and the resulting bulk magnetic properties because it provides crucial guidelines to produce long-range ordered magnetic MAX phases.

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Держатели документа:
Department of Chemistry, Technische Universität Darmstadt, 64287 Darmstadt, Germany
Institute of Materials Science, Technische Universität Darmstadt, 64287 Darmstadt, Germany
Faculty of Physics and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, 47057 Duisburg, Germany

Доп.точки доступа:
Kubitza, Niels; Xie, Ruiwen; Tarasov, I. A.; Тарасов, Иван Анатольевич; Shen, Chen; Zhang, Hongbin; Wiedwald, Ulf; Birkel, Christina S.
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Nonlinear optical characterization of spontaneously grown domain structures in SBO crystals / A. S. Aleksandrovsky [et al.] // Proceedings of SPIE - The International Society for Optical Engineering. - 2007. - Vol. 6729: ICONO 2007: Coherent and Nonlinear Optical Phenomena (28 May 2007 through 1 June 2007, Minsk, ) Conference code: 70618, DOI 10.1117/12.751986 . - ISBN 0277786X (ISSN); 081946886X (ISBN); 9780819468864 (ISBN)
Кл.слова (ненормированные):
Domains -- Nonlinear crystals -- Nonlinear diffraction -- Nonlinear generation -- Quasi phase matching -- Nonlinear crystals -- Nonlinear diffraction -- Nonlinear generation -- Quasi phase matching -- Computation theory -- Crystal growth -- Crystal structure -- Crystallography -- Diffraction -- Phase matching -- Nonlinear optics
Аннотация: Spontaneously grown partially ordered domain structures in SBO crystals are characterized via nonlinear diffraction. Domains have the form of sheets lying in cb plane with the domain walls oriented perpendicularly to the a crystallographic axis. The thickness of domains varies in quite wide range. The effective thickness of domains contributing to the nonlinear diffraction is determined from Fourier spectrum of inverse superlattice wave vectors to lie between 180 nm and 8 microns. General properties of spatial Fourier spectrum are reproducible from one growth procedure to another, however, details of spectrum noticeably vary. Enhancement factors for random QPM are calculated and found to be of order of several thousand in the near UV.

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Держатели документа:
L. V. Kirensky Institute of Physics, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Polytechnic Institute, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Kuzey, I. E. ; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Zaitsev, A. I.; Зайцев Александр Иванович; Zamkov, A. V.; Замков Анатолий Васильевич
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    Novel Cr3+-doped garnet phosphor with broadband efficient far-red emission for photochrome matching plant-lighting / X. Dai, X. Zou, H. Zhang [et al.] // Adv. Opt. Mater. - 2024. - Vol. 12, Is. 11. - Ст. 2302380, DOI 10.1002/adom.202302380. - Cited References: 54. - The work was supported by the National Natural Science Foundations of China (No. 12274144), the Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (No. 2023KJ122), the Key Realm R&D Program of Guangdong Province (No. 2021B0707010003), the Guangdong Provincial Science and Technology Project (No. 2022A1515010229), and the Project of GDUPS (2018) for Prof. Bingfu LEI . - ISSN 2195-1071
   Перевод заглавия: Новый гранатовый люминофор, легированный Cr3+, с широкополосным эффективным излучением в дальнем красном диапазоне для фотохромного освещения растений
Кл.слова (ненормированные):
Ca2YAl3–xGe2O12:xCr3+ -- garnets -- plant growth LEDs -- pc-LEDs -- photoluminescence
Аннотация: Cr3+-doped phosphors are highly recognized in various fields for their remarkable luminous efficiency and spectral flexibility, including modern agriculture and horticulture. However, the shortage of suitable Cr3+-doped phosphors for far-red LED devices has inhibited their popularization in plant lighting. Herein, an innovative Cr3+-doped phosphor Ca2YAl3Ge2O12:Cr3+ (CYAG:Cr3+), achieving a broad far-red emission at 770 nm upon 450 nm blue light excitation is designed. The optimal CYAG:Cr3+ phosphor exhibits a high internal quantum yield of 78.2% and low thermal-quenching behavior of 85%@373 K. Thus, the fabricated phosphor-converted LEDs (pc-LEDs) for plant far-red lighting have a high output power of 33.3 mW and photovoltaic conversion efficiency of 11.5% at 100 mA. The potential of CYAG:Cr3+ in plant lighting is assessed by supplementing the far-red lighting of Italian lettuce with fabricated pc-LEDs, and the biomass of Italian lettuce is significantly increased by 33%. The successful development of CYAG:Cr3+ phosphors provides a high-quality option for plant far-red light devices and further stimulates the development of new Cr3+-doped plant-lighting phosphors.

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Держатели документа:
Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangdong, Guangzhou, 510642, China
Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong, Maoming, 25100, China
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, 660036, Russian Federation
The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China

Доп.точки доступа:
Dai, X.; Zou, X.; Zhang, H.; Chen, W.; Yang, C.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Z.; Liu, Y.; Zhang, X.; Zheng, M.; Lei, B.
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Optical and nonlinear optical properties of orthorhombic BiB3O6 / A. V. Cherepakhin [et al.] // Opt. Mater. - 2012. - Vol. 34, Is. 5. - P. 790-792, DOI 10.1016/j.optmat.2011.11.004. - Cited References: 13. - The work was supported by Ministry of Education and Science of Russian Federation (Contract 16.740.11.0150), Grant of President of Russian Federation for support of leading scientific schools No. SS-4645.2010.2, Grant No. RNP.2.1.1.3455, Project 3.9.1 of PSB RAS, and Projects No. 27.1 and No. 5 of SB RAS. . - ISSN 0925-3467

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
BISMUTH BORATE BIB3O6
   CRYSTAL
   LASER
   GENERATION
   GROWTH
   BIBO
Кл.слова (ненормированные):
Orthorhombic bismuth triborate delta-BiBO -- Refractive indices -- Nonlinear optical coefficients -- Nonlinear optical materials -- Phase matching
Аннотация: Dispersion of refraction coefficients of orthorhombic BiB3O6 in the wavelength range between 435.8 and 1060 nm is studied, nonlinear optical coefficients are determined, and phase matching angles, angular and spectral bandwidths for second harmonic generation processes are calculated. delta-BiBO may be suitable for doubling of lasers with a wavelength in the 1.3 mu m region as well as the matrix for self-doubling lasing media. (C) 2011 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660079, Russia

Доп.точки доступа:
Cherepakhin, A. V.; Черепахин, Александр Владимирович; Zaitsev, A. I.; Зайцев, Александр Иванович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Zamkov, A. V.; Замков, Анатолий Васильевич
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10.

Phase matched conversion of radiation in nonlinear photonic crystals of strontium tetraborate / A. S. Aleksandrovsky [et al.] // 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, DOI 10.1117/12.872943 . - ISBN 0277786X (ISSN); 9780819485663 (ISBN)
Кл.слова (ненормированные):
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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Держатели документа:
Kirensky Institute of Physics, Akademgorodok 50/38, 660036, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodniy 79, 660041, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aleksandrovsky, A.S.; Vyunishev, A.M.; Zaitsev, A.I.; Ikonnikov, A.A.; Pospelov, G.I.; Slabko, V.V.
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