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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.
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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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