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利用光子能量为0.12 eV的10.6 m连续激光分别辐照了禁带宽度为0.91和0.33 eV的光伏碲镉汞探测器. 实验表明,激光辐照下禁带宽度为0.91 eV的探测器输出正电压,而禁带宽度为0.33 eV的探测器对激光的响应方向却与之相反. 为了研究此现象,利用功率密度一定的10.6 m激光辐照不同开路电压状态下禁带宽度为0.91 eV的探测器,实验结果证实初始开路电压是产生输出电压反向现象的原因. 对这一机理进一步分析发现,光伏探测器在光子能量小于禁带宽度的激光辐照下,其开路电压是热激发载流子导致的热生电动势和自由载流子吸收导致的晶格热效应共同决定的.
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关键词:
- 能量小于禁带宽度的光子 /
- 光伏碲镉汞探测器 /
- 热生电动势 /
- 晶格热效应
The photovoltaic HgCdTe detectors with band gaps 0.91 and 0.33 eV are irradiated by 10.6 m laser (0.12 eV photon energy), separately. It is found that output voltage of detector (0.91 eV band gap) is positive, while the response voltage of detector (0.33 eV band gap) is opposite to it. To investigate this phenomenon, the detector with a band gap of 0.91 eV is irradiated by a given power 10.6 m laser under different initial open-circuit voltags. It is experimentally demonstrated that the phenomenon is caused by the initial open-circuit voltage. With further investigation, the open-circuit voltage of the photovoltaic detector is determined by both the thermovoltage caused by thermoexcited carrier and the crystal thermal effect produced by free carrier absorption under sub-bandgap laser irradiation.-
Keywords:
- sub-bandgap photons /
- photovoltaic-HgCdTe detector /
- thermovoltage /
- crystal thermal effect
[1] Bartoli F, Esterowitz L, Kruer M, Allen R 1977 Appl. Opt. 16 2934
[2] Bartoli F J, Esterowitz L, Kruer M R, Allen R E 1975 Appl. Opt. 14 2499
[3] [4] [5] Bartoli F, Esterowitz L, Allen R, Kruer M 1976 J. Appl. Phys. 47 2875
[6] Kuanr A V, Bansal S K, Srivatava G P 1996 Opt. and Laser Technol. 28 345
[7] [8] [9] Cui H Y, Li Z F, Ma F J, Hu X N, Ye Z H, Lu, W 2009 J. Infrared Millim. Waves 28 161 (in Chinese) [崔昊杨、 李志锋、 马法君、 胡晓宁、 叶振华、 陆 卫 2009 红外毫米波学报 28 161]
[10] [11] Song Q L, Wu H R, Hou X Y, Ding X M, Hou X Y, Li F Y, Zhou Z G 2006 Appl. Phys. Lett. 88 232101
[12] Le Y X, Jiang H M 2008 High Power Laser and Particle Beams 20 1233(in Chinese) [贺元兴、 江厚满 2008 强激光与粒子束 20 1233]
[13] [14] [15] Li L, Lu Q S, Jiang H M, Cheng X A 2007 Acts Opt. Sin. 27 85 (in Chinese) [李 莉、 陆启生、 江厚满、 程湘爱 2007 光学学报 27 85]
[16] [17] Li L, Lu Q S 2008 Acts Opt. Sin. 28 1953 (in Chinese) [李 莉、 陆启生 2008光学学报 28 1953]
[18] [19] Krishnamurthy S, Sher A, Chen A B 2000 J. Appl. Lett. 88 260
[20] Takagi Y, Kobayashi, Yoshihara K 1992 Opt. Lett. 17 658
[21] [22] [23] Cui H Y, Li Z F, Li Y J, Liu Z L, Xu X S, Lu W, Ye Z H, Hu X N, Wang C 2008 Acta Phys. Sin. 57 0238 (in Chinese) [崔昊杨、 李志锋、 李亚军、 刘昭麟、 陈效双、 陆 卫、 叶振华、 胡晓宁、 王 茺 2008 57 0238]
[24] [25] Yang G, Chen Z H 2007 Acta Phys. Sin. 56 1182 (in Chinese) [杨 光、 陈正豪 2007 56 1182]
[26] [27] Zhu L, Yang W G, Xu L L, Chen D A, Wang W. Cui Y P 2007 Acta phys. Sin. 56 569 (in Chinese) [朱 利、 杨文革、 徐玲玲、 徐安定、 王 文、 崔一平 2007 56 569]
[28] Li L,Lu Q S 2010 High Power Laser and Particle Beams 22 2535 (in Chinese) [李 莉、 陆启生 2010 强激光与粒子束 22 2535]
[29] [30] Loch M, Widenhorn R, Bodegom E 2005 Proc of SPIE 5677 201
[31] [32] [33] Green M A 2003 Res. Appl. 11 333
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[1] Bartoli F, Esterowitz L, Kruer M, Allen R 1977 Appl. Opt. 16 2934
[2] Bartoli F J, Esterowitz L, Kruer M R, Allen R E 1975 Appl. Opt. 14 2499
[3] [4] [5] Bartoli F, Esterowitz L, Allen R, Kruer M 1976 J. Appl. Phys. 47 2875
[6] Kuanr A V, Bansal S K, Srivatava G P 1996 Opt. and Laser Technol. 28 345
[7] [8] [9] Cui H Y, Li Z F, Ma F J, Hu X N, Ye Z H, Lu, W 2009 J. Infrared Millim. Waves 28 161 (in Chinese) [崔昊杨、 李志锋、 马法君、 胡晓宁、 叶振华、 陆 卫 2009 红外毫米波学报 28 161]
[10] [11] Song Q L, Wu H R, Hou X Y, Ding X M, Hou X Y, Li F Y, Zhou Z G 2006 Appl. Phys. Lett. 88 232101
[12] Le Y X, Jiang H M 2008 High Power Laser and Particle Beams 20 1233(in Chinese) [贺元兴、 江厚满 2008 强激光与粒子束 20 1233]
[13] [14] [15] Li L, Lu Q S, Jiang H M, Cheng X A 2007 Acts Opt. Sin. 27 85 (in Chinese) [李 莉、 陆启生、 江厚满、 程湘爱 2007 光学学报 27 85]
[16] [17] Li L, Lu Q S 2008 Acts Opt. Sin. 28 1953 (in Chinese) [李 莉、 陆启生 2008光学学报 28 1953]
[18] [19] Krishnamurthy S, Sher A, Chen A B 2000 J. Appl. Lett. 88 260
[20] Takagi Y, Kobayashi, Yoshihara K 1992 Opt. Lett. 17 658
[21] [22] [23] Cui H Y, Li Z F, Li Y J, Liu Z L, Xu X S, Lu W, Ye Z H, Hu X N, Wang C 2008 Acta Phys. Sin. 57 0238 (in Chinese) [崔昊杨、 李志锋、 李亚军、 刘昭麟、 陈效双、 陆 卫、 叶振华、 胡晓宁、 王 茺 2008 57 0238]
[24] [25] Yang G, Chen Z H 2007 Acta Phys. Sin. 56 1182 (in Chinese) [杨 光、 陈正豪 2007 56 1182]
[26] [27] Zhu L, Yang W G, Xu L L, Chen D A, Wang W. Cui Y P 2007 Acta phys. Sin. 56 569 (in Chinese) [朱 利、 杨文革、 徐玲玲、 徐安定、 王 文、 崔一平 2007 56 569]
[28] Li L,Lu Q S 2010 High Power Laser and Particle Beams 22 2535 (in Chinese) [李 莉、 陆启生 2010 强激光与粒子束 22 2535]
[29] [30] Loch M, Widenhorn R, Bodegom E 2005 Proc of SPIE 5677 201
[31] [32] [33] Green M A 2003 Res. Appl. 11 333
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