| 光折变晶体钛酸钡锶电荷传输参数的测量 |
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| 引用本文： | 高宪成,黄亦好.光折变晶体钛酸钡锶电荷传输参数的测量[J].光学学报,1993,13(3):68-271. |
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| 作者姓名： | 高宪成 黄亦好 |
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| 作者单位： | 中国科学院福建物质结构研究所 福州350002
(高宪成，黄亦好，翁雅英，陈黎娜)，中国科学院福建物质结构研究所 福州350002(庄健) |
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| 摘 要： | 报道用两波耦合技术测量光折变晶体钛酸钡锶(Ba_(1-x)Sr_xTiO-3,BST)的电荷传输参数φμτ在激光波长λ=515nm和光功率密度I—1W/cm~2下测得光折变响应时间为0.5sec.考虑到BST晶体吸收系数的光强相关性,修改了光栅形成率的函数变量,得到BST晶体的暗电导σ_a和电荷传输参数φμτ的拟合值分别为1.0×10~(-11)(Ωcm)~(-1)和2.8×10~(-10)cm~2/V.
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| 关 键 词： | 光折变晶体 钛酸钡锶 电荷输运 |
| 收稿时间： | 1992/4/3 |
Measurement of charge transport parameter of photorefractive crystal barium strontium titanate |
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| GAO Xiancheng HUANG Yihao WENG Yaying CHEN Lina ZHUANG Jian.Measurement of charge transport parameter of photorefractive crystal barium strontium titanate[J].Acta Optica Sinica,1993,13(3):68-271. |
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| Authors: | GAO Xiancheng HUANG Yihao WENG Yaying CHEN Lina ZHUANG Jian |
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| Abstract: | The charge transport parameter φμτ of the photorefractive crystal barium strontium titanate (Ba1-x SrxTiO3, BST) has been measured by means of two-beam coupling technique. The photorefractive response time for an intensity of 1 W/cm2 at 515 nm has been determined to be 0.5 s. The functional variable for the rate of grating formation has been corrected by taking into account of intensity-dependent absorption coefficient of the crystal. The fitted values of the dark conductivity σd and the charge transport parameter φμτ have been obtained to be 1.0×10-11 (Ωcm)-1 and 2.8×10-10 cm2/V, respectively. |
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| Keywords: | photorefractive crystal barium strontium titanate charge transport parameter |
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