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Doped GaSe crystals for laser frequency conversion

Light(Science & Applications) 2015年第1期4卷 47-58页

作者： Jin Guo Ji-Jiang Xie Dian-Jun Li Gui-Long Yang Fei Chen Chun-Rui Wang Lai-ming Zhang yury m andreev Konstantin A Kokh Gregory V Lanskii Valery A Svetlichnyi State Key Laboratory of Laser Interaction with matter Changchun Institute of OpticsFine Mechanics and PhysicsCASChangchun 130033China Innovation Laboratory of Electro-Optical Countermeasures Technology Changchun Institute of OpticsFine Mechanics and PhysicsCASChangchun 130033China Laboratory of GeosphereBiosphere Interactions Institute of Monitoring of Climatic and Ecological SystemsSB RASTomsk 634055Russia Laboratory of Advanced materials and Technologies Siberian Physical-Technical Institute of Tomsk State UniversityTomsk 634050Russia Crystal Growth Laboratory Institute of Geology and MineralogySB RASNovosibirsk 630090Russia Novosibirsk State University Novosibirsk 630090Russia

In this review,we introduce the current state of the art of the growth technology of pure,lightly doped,and heavily doped(solid solution)nonlinear gallium selenide(GaSe)crystals that are able to generate broadband emission from the near infrared(IR)(0.8 mm)through the mid-and far-IR(terahertz(THz))ranges and further into the millimeter wave(5.64 mm)*** the first time,we show that appropriate doping is an efficient method controlling a range of the physical properties of GaSe crystals that are responsible for frequency conversion efficiency and exploitation *** appropriate doping,uniform crystals grown by a modified technology with heat field rotation possess up to 3 times lower absorption coefficient in the main transparency window and THz ***,doping provides the following benefits:raises by up to 5 times the optical damage threshold;almost eliminates two-photon absorption;allows for dispersion control in the THz range independent of the mid-IR dispersion;and enables crystal processing in arbitrary directions due to the strengthened ***,doped GaSe demonstrated better usefulness for processing compared with GaSe grown by the conventional technology and up to 15 times higher frequency conversion efficiency.

关键词： frequency conversion GaSe solid solution crystal THz

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mathematical simulation of low cycle fatigue of high-loaded engine parts

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Propulsion and Power Research 2018年第4期7卷 277-287页

作者： yury m.Temis Central Institute of Aviation motors 2 Aviamotornaya st.Moscow 111116Russia

The paper discusses main aspects of low cycle fatigue influence on the lifetime ofengine *** importance and history of the problem,the main experiments and the effectsimpacting the low cycle fatigue of structural materials are described.A hypothesis about theexistence of a thermomechanical surface of structural material,generalized to the case of acyclical loading was used to approximate the loops of cyclic nonisothermal elastoplasticdeformation *** cyclic deformation curve model is based on the following threeparameters:the elastic modulus during unloading,the Bauschinger effect and the conversionparameter of the nonlinear part of its first *** model also accounts for theaccumulated plastic strain,as well as the testing *** criterion of durability isformulated,based on the dependence between the number of halfcycles to failure and theaccumulated plastic *** theory of plasticity,generalized to the case ofcyclic deformation,in combination with the durability model and technology of"dying"elements is applied to the finite element analysis of low cycle fatigue of gas turbine *** results of calculations are demonstrated.

关键词： Gas turbine engine Low cycle fatigue Nonisothermal plasticity Finite element modeling Durability modeling Cyclic loading

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GaSe晶体的CO_2激光倍频及其色散特性研究

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光电子．激光 2013年第5期24卷 903-907页

作者：姜可谢冀江张来明李殿军谢京江 yury andreev 中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室吉林长春130033 中国科学院大学北京130039 俄罗斯科学院西伯利亚分院气候与生态系统监测研究所

为了研究GaSe晶体的倍频(SHG)及色散性质,采用声光调Q可调谐线偏振CO2脉冲激光器,在250 Hz重频脉冲下以共线oo-e相位匹配方式作用于GaSe晶体,得到CO2激光的可调谐SHG输出。测量了基频波长为9.3、9.6、10.3和10.6μm时的相位匹配角,并通... 详细信息

为了研究GaSe晶体的倍频(SHG)及色散性质,采用声光调Q可调谐线偏振CO2脉冲激光器,在250 Hz重频脉冲下以共线oo-e相位匹配方式作用于GaSe晶体,得到CO2激光的可调谐SHG输出。测量了基频波长为9.3、9.6、10.3和10.6μm时的相位匹配角,并通过对比现有文献中色散方程的相位匹配角计算结果和测量结果,确定出最适用于GaSe晶体的色散方程。实验对SHG信号与晶体中光束方位角φ的关系进行测量。本文实验可以作为间接测量晶体色散关系的方法,为GaSe晶体的进一步研究打下基础;同时也可为其它非线性晶体的研究提供参考。

关键词：非线性光学 GaSe性质 CO2倍频(SHG) 相位匹配色散方程

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Capacitance,charge dynamics,and electrolyte-surface interactions in functionalized carbide-derived carbon electrodes

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Progress in Natural Science:materials International 2015年第6期25卷 631-641页

作者： Boris Dyatkin Eugene mamontov Kevin m.Cook yury Gogotsi Department of materials Science & Engineering and A.J.Drexel Nanomaterials Institute Drexel University Spallation Neutron Source Oak Ridge National Laboratory materials Engineering Division Naval Air Systems Command

This study analyzed the dynamics of ionic liquid electrolyte inside of defunctionalized,hydrogenated,and aminated pores of carbide-derived carbon supercapacitor *** approach tailors surface functionalities and tunes nanoporous structures to decouple the influence of pore wall composition on capacitance,ionic resistance,and long-term ***-elastic neutron scattering probes the self-diffusion properties and electrode-ion interactions of electrolyte molecules confined in functionalized ***-temperature ionic liquid interactions in confined pores are strongest when the hydrogen-containing groups are present on the *** property translates into higher capacitance and greater ion transport through pores during electrochemical *** hydrogenated pores,aminated pores do not favorably interact with ionic liquid ions and,subsequently,are outperformed by defunctionalized surfaces.

关键词： Supercapacitor Carbide-derived carbon Neutron scattering Energy storage Porous materials Surface chemistry

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mXenes-The fastest growing materials family in the two-dimensional world

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Chinese Chemical Letters 2020年第4期31卷 919-921页

作者： Bin Xu yury Gogotsi State Key Laboratory of Organic-Inorganic Composites Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China A.J.Drexel Nanomaterials Institute Department of Materials Science States and EngineeringDrexel UniversityPhiladelphiaPA 19104United States

The structural and compositional variety combined with tunable surface characteristics have rendered mXenes as one of the most versatile 2D material families with numerous rapidly expanding application *** are typically synthesized by selective etching of layered carbide and nitride precursors,such as mAX phases,which have the general formula mn+1AXn(n=1-4),where m is an early transition metal.

关键词： mXene render carbide

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Two-dimensional mXenes and their applications

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Frontiers of physics 2023年第1期18卷 1-5页

作者： Guangcun Shan Zejian Ding yury Gogotsi School of Instrumentation Science and Opto-electronics Engineering Beihang UniversityBeijing 100091China Institute of Experimental Physics Saarland University66123 SaarbrückenGermany A.J.Drexel Nanomaterials Institute and Department of Materials Science and EngineeringDrexel UniversityPhiladelphiaPA 19104USA

Two-dimensional(2D)transition metal carbides,nitrides or carbonitrides(mXene)have attracted tremendous attention as a potentially the largest family of inorganic *** have a general formula mn+1XnTx,where m is an early transition metal(2 or more can be present in a random mix or a specific order),X is C and/or N elements(oxygen can partially substitute),and T_(x)(x is variable)represent surface terminations,which can include reactive end groups(such as–OH and=O),halogens and chalcogens,and n can vary from 1 to 4(fractions are possible).All mXenes can either be produced as multilayer particles(ml-mXene)or delaminated(d-mXene)single-layer flakes.

关键词： materials. carbonitride dimensional

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Differences in migration phenology of warblers at two stopover sites in eastern Russia suggest a longitudinal migration pattern

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Avian Research 2023年第1期14卷 7-12页

作者： LászlóBozó yury Anisimov Wieland Heim Eötvös Loránd University Department of Systematic Zoology and Ecology1117BudapestPáazmány Péter sétány1/CHungary Baikalsky State Nature Biosphere Reserve TankhoyRussia Turku University Department of BiologyFI-20014TurkuFinland münster University Institute of Landscape EcologyMünsterGermany

Long-distance migratory birds often face major geographical barriers on their *** some species are able to cross them,others use longer routes to avoid such *** is known about the strategies of Siberian landbird migrants,which either cross or circumvent the deserts and mountain ranges of Central Asia en route to their non-breeding sites in Southeast *** we compare data on migration phenology and morphology from two bird ringing stations in eastern Russia,situated at similar latitudes but with a longitudinal difference of 1500 km,to hypothesise migration *** found significant differences in timing between the two sites(birds migrated significantly earlier in spring and significantly later in autumn in the east),suggesting longitudinal migration as a result of migration ***,morphological differences show a less clear *** argue that most Siberian landbirds might opt for a detour through the Russian Far East instead of a direct route in order to avoid unfavourable stop-over habitat in Central ***,tracking studies will be necessary to prove this.

关键词： East Asian flyway Barrier Detour migration Passerine Phylloscopus

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掺硫硒化镓晶体在太赫兹波段的光学特性

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光学精密工程 2011年第2期19卷 354-359页

作者：罗志伟古新安朱韦臻唐维聪 andreev yury LANSKII Grigory mOROZOV Alexander ZUEV Vladimir 交通大学电子物理系中国新竹30010 Institute of monitoring of Climatic and Ecological Systems of Siberian Branch of Russian Academy of Sciences Tomsk Russia

利用太赫兹时域光谱技术测量了掺硫硒化镓（GaSe1-xSx）晶体在太赫兹波段的光学参数,包括折射系数、吸收系数等。使用自由空间电光取样法获得了太赫兹电磁波的脉冲波形,对不同硫掺杂量的硒化镓晶体进行了研究,在硫的掺杂量为0,0.01,0.14... 详细信息

利用太赫兹时域光谱技术测量了掺硫硒化镓（GaSe1-xSx）晶体在太赫兹波段的光学参数,包括折射系数、吸收系数等。使用自由空间电光取样法获得了太赫兹电磁波的脉冲波形,对不同硫掺杂量的硒化镓晶体进行了研究,在硫的掺杂量为0,0.01,0.14,0.26,0.37时,在0.22.0 THz测得了GaSe1-xSx的折射系数、吸收系数等光学参数。此外还在吸收光谱上观察到E′^（2）和E″^（2）两个声子振动模态,其强度与频率会随着硫的掺杂量而改变,且即使是微量的硫掺杂也会影响吸收光谱上的声子振动模态。最后,在相位匹配ee-e的条件下,模拟了利用锁模钛蓝宝石激光使此类晶体产生太赫兹辐射的可能性。

关键词：掺硫硒化镓晶体太赫兹辐射太赫兹时域光谱

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Electrofishing method improves evaluation of amphibian larvae abundance:a case of“beaver rivers”

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Integrative Zoology 2017年第4期12卷 345-350页

作者： yury Y.DGEBUADZE Ivan V.BASHINSKIY Severtsov Institute of Ecology&Evolution Leninsky ProspectMoscowRussia

There are many locations in Russia where Eurasian beaver(Castor fiber)populations have been *** a keystone species,beavers provide wide-ranging direct and indirect impacts on aquatic *** particular,beaver-created ponds are sites for spawning and nursery places for tadpoles of the brown frogs(genus Rana).Because of such impacts,study techniques for assessing aquatic organism abundance are being *** compared two methods for estimating tadpole abundance:traditional catches by dipnet and *** results show that the dipnet catch data for the shallower ponds with larger water surface area were five times lower than that obtained by ***,we conclude that dipnet catches are not suitable for comparing the relative abundance of tadpoles in the two beaver ponds that were studied.

关键词： abundance of tadpoles beaver ponds Rana

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Problems and Characteristics of Russian Platinum metals Exporters

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贵金属 2012年第A1期33卷 284-286页

作者： andreev A. m. KELCHEVSKAYA N. R. JSC "Ekaterinburg non-ferrous metals processing plant" The Urals Federal University by name of the first President of Russia Boris Yeltsin" Ekaterinburg Russia.

The paper revealed the place and role of Russia in the global market of platinum metals, highlighted features of pricing in the export of Russian platinum group metals, the main problems of pricing in the export contracts related to the instability of markets and imperfect currency and customs legislation of the Russian Federation, proposed innovative ways to solutions to existing problems in the preparation and conclusion of export contracts.

关键词： platinum metals Russia pricing export contracts customs duties customs fees customs value stock quotes discount

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