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掺硫硒化镓晶体在太赫兹波段的光学特性

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

Doped GaSe crystals for laser frequency conversion

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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

Particle Simulation of the Fast Ignition Mechanism for Laser Fusion

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Chinese Physics Letters 2001年第6期18卷 799-801页

作者： ZHANG Jia-Tai He Bin N.E.andreev Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088 Joint Institute for High Temperature Russian Academy of SciencesMoscow 127412Russia

We have developed the two and half-dimension electromagnetic relativistic electron and mobile ion cloud-in-cell(CIC)*** of the fast ignition and interaction of ultra-intense and ultra-short pulse laser with plasma are analysed theoretically and simulated numerically using CIC *** flows of relativistic electron and form of the channel are *** results show that the temperature of superhot electron is about MeV to tens of MeV,and the boring velocity is 0.05c-0.1c with c being the light *** preliminary scale laws are *** simulation quantitatively reproduces the experimental results at early and long times.

关键词： relativistic intense dimension

Major Trends in Population Growth Around the World

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China CDC weekly 2021年第28期3卷 604-613页

作者： Danan Gu Kirill andreev Matthew E.Dupre United Nations Population Division New YorkUSA Department of Population Health Sciences&Department of Sociology Duke UniversityNorth CarolinaUSA

Summary The world’s population continues to grow,albeit at a slower *** decelerating growth is mainly attributable to fertility declines in a growing number of ***,there are substantial variations in the future trends of populations across regions and countries,with sub-Saharan African countries being projected to have most of the increase.

关键词： Population Growth fertility

Collimated quasi-monochromatic beams of accelerated electrons in the interaction of a weak-contrast intense femtosecond laser pulse with a metal foil

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High Power Laser Science and Engineering 2013年第2期1卷 80-87页

作者： Yu.A.Malkov A.N.Stepanov D.A.Yashunin L.P.Pugachev P.R.Levashov N.E.andreev K.Yu.Platonov A.A.andreev Institute of Applied Physics Russian Academy of Sciences ul. Ulyanova 46 603950 Nizhny Novgorod Russia Joint Institute of High Temperatures Russian Academy of Sciences Izhorskaya ul. 13 125412 Moscow Russia Federal State Unitary Enterprise ‘‘Scientific and Industrial Corporation ‘Vavilov State Optical Institute’’’ Birzhevay liniya 12 St 199034 Petersburg Russia

We demonstrated experimentally the formation of monoenergetic beams of accelerated electrons by focusing femtosecond laser radiation with an intensity of 2×1017W/cm2onto the edge of an aluminum *** electrons had energy distributions peaking in the 0.2–0.8 MeV range with energy spread less than 20%.The acceleration mechanism related to the generation of a plasma wave as a result of self-modulation instability of a laser pulse in a dense plasma formed by a prepulse(arriving 12 ns before the main pulse)is ***-dimensional and two-dimensional Particle in Cell(PIC)simulations of the laser–plasma interaction showed that effective excitation of a plasma wave as well as trapping and acceleration of an electron beam with an energy on the order of 1 MeV may occur in the presence of sharp gradients in plasma density and in the temporal shape of the pulse.

关键词： acceleration of electrons femtosecond laser radiation plasma wave self-modulation instability

Review of the relativistic magnetron

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Matter and Radiation at Extremes 2019年第6期4卷 44-62页

作者： Dmitrii andreev Artem Kuskov Edl Schamiloglu Department of Electrical and Computer Engineering University of New MexicoAlbuquerqueNew Mexico 87131-0001USA

The cavity magnetron is the most compact,efficient source of high-power microwave(HPM)*** imprint that the magnetron has had on the world is comparable to the invention of the nuclear ***-and low-power magnetrons are used in many applications,such as radar systems,plasma generation for semiconductor processing,and—the most common—microwave ovens for personal and industrial *** the invention of the magnetron in 1921 by Hull,scientists and engineers have improved and optimized magnetron technology by altering the geometry,materials,and operating conditions,as well as by identifying applications.A major step in advancing magnetrons was the relativistic magnetron introduced by Bekefi and Orzechowski at MIT(USA,1976),followed by the invention of the relativistic magnetron with diffraction output(MDO)by Kovalev and Fuks at the Institute of Applied Physics(Soviet Union,1977).The performance of relativistic magnetrons did not advance significantly thereafter until researchers at the University of Michigan and University of New Mexico(UNM)independently introduced new priming techniques and new cathode topologies in the 2000s,and researchers in Japan identified a flaw in the original Soviet MDO ***,the efficiency of the MDO has reached 92%with the introduction of a virtual cathode and magnetic mirror,proposed by Fuks and Schamiloglu at UNM(2018).This article presents a historical review of the progression of the magnetron from a device intended to operate as a high-voltage switch controlled by the magnetic field that Hull published in 1921,to the most compact and efficientHPMsource in the twenty-first century.

关键词： relativistic microwave mirror

Optical properties and phase-matching in LiInS2

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Chinese Optics Letters 2003年第4期1卷 237-240页

作者：黄金哲任德明胡孝勇曲彦臣 Yuri andreev Pavel Geiko Anna Shaiduko Sergey Grechin Institute of Opto-Electronics Harbin Institute of TechnologyHarbin 150001 Institute of Optical Monitoring SB RAS Tomsk 634055 Russia SRIRL Bauman Moscow State Technical University Moscow 107005 Russia

Investigation results on linear and non-linear optical properties, damage threshold and potential efficiencies of biaxial negative LiInS2 crystal are represented. It shows that the crystal has phase-matching and group-velocity matching in wide spectral range for second harmonic, sum- and difference-frequency generation of visible, near and middle IR lasers. The possibilities of designing middle IR optical parametric oscillator (OPO) pumped by Nd:YAG and dye lasers and specially possibility of frequency conversion with 3 um range femtosecond erbium lasers are given.

关键词： Crystals Optical frequency conversion Optically pumped lasers

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

Nanostructured TiO2(B):the effect of size and shape on anode properties for Li-ion batteries

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Progress in Natural Science:Materials International 2013年第3期23卷 235-244页

作者： Zheng Liu Yuri G.andreev A.Robert Armstrong Sergio Brutti Yu Ren Peter G.Bruce School of Chemistry and EaStChem University of St AndrewsSt AndrewsFife KY16 9STUK Dipartimento di Scienze Unversità della BasilicataV.le Ateneo Lucano 10Potenza 85100Italy National Institute of Clean-and-low-carbon Energy(NICE) Future Science& Technology CityChangping

Reducing the dimensions of electrode materials from the micron to the nanoscale can have a profound influence on their properties and hence on the performance of electrochemical devices,***-ion batteries,that employ such ***2(B) has received growing interest as a possible anode for Li-ion batteries in recent *** offers the possibility of higher energy storage compared with the commercialized ***,nanowire,nanotube,and nanoparticle morphologies have been prepared and ***,to date these materials have not be compared in one *** the current review we first summarize the different synthesis methods for the preparation of nanostructured TiO2(B);then present the effects of size and shape on the electrochemical *** TiO2(B) with nanometer dimensions exhibit a higher capacity to store Li,regardless of rate,due to structural distortions inherent at the nanoscale.

关键词： TiO2(B) Synthesis Anode Nanostructure Li-ion batteries