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半绝缘GaAs光电导开关的瞬态热效应

施卫 马湘蓉 薛红

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半绝缘GaAs光电导开关的瞬态热效应

施卫, 马湘蓉, 薛红

Transient thermal effect of semi-insulating GaAs photoconductive switch

Shi Wei, Ma Xiang-Rong, Xue Hong
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  • 实验用波长1064 nm,触发光能为1.0 mJ的激光脉冲触发电极间隙为4 mm的半绝缘GaAs光电导开关,当光电导开关的偏置电压达到3800 V时,开关进入非线性(lock-on)工作模式,在偏置电场和触发光能不变的条件下,开关输出稳定的非线性电脉冲,1500次触发后GaAs开关表面出现因丝状电流引起损伤的痕迹.分析认为:在一定触发光能和电场阈值条件下,开关芯片内存在两种瞬态热效应:热弛豫效应和光激发电荷畴-声子曳引效应.热弛豫时间很短,在皮秒甚至亚皮秒量级,热弛豫过程导致了热传导的弛豫行为;当光激发电荷畴以107 cm/s的速度从阴极向阳极渡越时,在这两种效应的作用下使得开关芯片瞬态温度变化发生了弛豫振荡现象.光激发电荷畴-声子曳引效应在位错运动方向上传播,声子流携带的热能集中在移动的平面内,使得移动区域温度升高,移动轨迹经多次叠加累积呈现出丝状的损伤痕迹.
    Results of experiments of the 4 mm gap semi-insulating(SI) GaAs photoconductive switch triggered by 1064 nm, 1.0 mJ pulse laser showed the nonlinear mode when the bias field was 3800 V. Under the same bias electric field and trigger light energy conditions, the switch outputs stably nonlinear electrical pulses, and the switch surface injury mark is caused by filamentation after 1500 times triggering. Analysis shows that under given conditions of trigger energy and electric field, two transient thermal effects occur in the switch chip, namely the thermal relaxation and photoactivated charge domain-phonon drag, respectively. Thermal relaxation time is shortened to the order of picoseconds or subpicoseconds, thermal relaxation process leads to the thermal conduction relaxation. When photoactivated charge domain moves at 107cm/s speed from cathode to anode, switch chip transient temperature makes relaxation oscillations owing to these effects, and the rapid increase of temperature in the chip is constrained. Photoactivated charge domain-phonon drag effect transmits in the direction of the dislocation movement, the temperature in mobile region increases when the flow of thermal energy carried by the phonons was concentrated in the movement plane, the injury of filamentation is produced by superposition and cumulation of mobile tracks.
    • 基金项目: 国家重点基础研究发展计划(批准号:2007CB310406),国家自然科学基金(批准号: 50837005和10876026),电力设备电气绝缘国家重点实验室(批准号:EIPE09203)资助的课题.
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    Shi W, Qu G H, Xu M, Xue H, Ji W L, Zhang L, Tian L Q 2009 Appl. Phys. Lett. 94 072110

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  • [1]

    Loubrie G M, Zutavem F J, Baca A G, Hjalmarson H P, Plut T A, Helgeson W D, Malley W O, Ruebush M H, Brown D J 1997 IEEE Trans. Plasma Science 25 124

    [2]

    Islam N E, Schamiloglu E, Fledderman B 1998 Appl. Phys. Lett. 73 1988

    [3]

    Shi W, Tian L Q 2006 Appl. Phys. Lett 89 202103

    [4]

    Jia W L, Ji W L, Shi W 2007 Acta Phys. Sin. 56 2042 ( in Chinese) [贾婉丽、纪卫莉、施 卫 2007 物理学报 56 2042]

    [5]

    Shi W, Wang X M, Hou L, Xu Ming, Liu Zheng 2008 Acta Phys. Sin. 57 6816 (in Chinese ) [施 卫、王馨梅、侯 磊、徐 明、刘 铮 2008 物理学报 57 6816]

    [6]

    Shi W, Qu G H, Wang X M 2009 Acta Phys. Sin. 58 477 (in Chinese ) [施 卫、屈光辉、王馨梅 2009 物理学报 58 477]

    [7]

    Liang L, Yu Y H, Peng Y B 2008 Chin. Phys. B 17 2627

    [8]

    Xu X J, Chen S W, Xu H H, Sun Y 2009 Chin. Phys. B 18 3900

    [9]

    Shi W, Zhang X B, Li Q 2002 China. Phys. Lett .19 351

    [10]

    Shi W, Tian L Q 2004 Chinese Journal of Semiconductor 25 691 (in Chinese) [施 卫、田立强 2004 半导体学报 25 691]

    [11]

    Shi W, Tian L Q, Liu Z, Zhang L Q, Zhang Z Z 2008 Appl. Phys. Lett. 92 043511

    [12]

    Li J X, Zhang M J, Niu S X and Wang Y C 2008 Chin. Phys. B 17 4516

    [13]

    Liu Y M, Yu Z Y, Ren X M 2009 Chin. Phys. B 18 881

    [14]

    Shah. J, 1978 Solid-State Electron 21 43

    [15]

    Liu J 2001 Micro/Nano-scale Heat Transfer (Beijing: Science Press) p 208 (in Chinese) [刘 静 2001 微米/纳米尺度传热学 (北京:科学出版社) 第208页]

    [16]

    Albert M T Kim, 2001 Ph. D. Dissertation (Massachusetts: Harvard University)

    [17]

    Herring C, Geballe T H, Kunzler J E 1954 Phys. Rev. 94 279

    [18]

    Herring C 1954 Phy. Rev. 92 1163

    [19]

    Herring C 1954 Phy. Rev. 92 857

    [20]

    Cheng Y S, Zhou P Y, Feng Y Q 1996 Physical effect and applications (Tianjin: Tianjin university press) p161 (in Chinese) [陈宜生、周佩瑶、冯艳全 1996 物理效应及其应用 (天津:天津大学出版社) 第161页]

    [21]

    Dugdale J S 1977 The Electrical Properties of Metals and Alloys (Edward Arnold publishers Ltd) p183

    [22]

    Shi W 2001 Chinese Journal of Semiconductors 22 1481

    [23]

    Shi W, Dai H Y, Sun X W 2003 Chinese Optics Letters 1 553

    [24]

    Tian L Q, Shi W 2008 J. Appl. Phys. 103 124512

    [25]

    Shi W, Qu G H, Xu M, Xue H, Ji W L, Zhang L, Tian L Q 2009 Appl. Phys. Lett. 94 072110

    [26]

    Kayasit P, Joshi R P 2001 J. Appl. Phys. 89 1411

    [27]

    Shah J, Leheny R F, Wiegmann W 1977 Phys. Rev. B 16 1577

    [28]

    Zutavern F J, Loubriel G M, Mclaughling D L 1992 Proc. SPIE 1632 152

    [29]

    Kambour K, Kang S, Myles C W, Hjalmarson H P 2000 IEEE Tran. Plasma Science 28 1497

    [30]

    Zutavern F J, Loubriel G M, O’Malley M W, Helgeson W D, Mclaughlin D L 1992 IEEE Power Modulator Symposium, Conference Record of the Twentieth, 23—25 Jun 1992 p305

    [31]

    Peierls R 1940 Proc. Phys. Soc. London 52 34

    [32]

    Nabarro F R N 1947 Proc. Phys. Soc. London 59 256

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出版历程
  • 收稿日期:  2009-07-19
  • 修回日期:  2009-12-07
  • 刊出日期:  2010-04-05

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