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One transmission-mode extended blue GaAs photocathode is prepared by MOCVD , whose integral sensitivity is 1980 A/lm. Its spectral curve is compared with the spectral curve of ITT photocathode for analyzing optical structure. The comparison indicates that the differences lie in the thickness and the Al mole value of the Ga1-xAlxAs window layer, electron diffusion length, and back-interface recombination velocity, which make the photocathode in this experiment inferior to that of ITT in extended blue performance. However our surface electron-escape probability and the thickness of the GaAs active layer are in accordance with those of ITT, which leads their difference in the long waveband part to be less than in the short one. In addition, our absorptivity in the whole response waveband is smaller than that of ITT photocathode, which leads the spectral response and integral sensitivity of the domestic transmission-mode extended blue GaAs photocathode to be inferior to the exotic one.
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Keywords:
- GaAs photocathode /
- extended blue /
- photoelectric emission /
- optical structure
[1] Guo L J, Wüstenberg J P, Oleksiy A, Bauer M, Aeschlimann M2005 Acta Phys. Sin. 54 3200 (in Chinese) [郭立俊, Wüstenberg J P, Oleksiy A, Bauer M, Aeschlimann M 2005 54 3200]
[2] Zhou LW, Li Y, Zhang Z Q, MonastyrskiMA, Schelve M Y 2005Acta Phys. Sin. 54 3591 (in Chinese) [周立伟,李元,张智诠, Monastyrski M A, Schelve M Y 2005 54 3591]
[3] Liu Z, Sun Y, Peterson S, Pianetta P 2008 Appl. Phys. Lett. 92241107
[4] Zhang Y J, Chang B K, Yang Z, Niu J, Zou J J 2009 Chin. Phys.B 18 4541
[5] Sinor T W, Estrera J P, Phillips D L, Rector M K 1997 Proc. SPIE2551 130
[6] Leopold D J, Buckley J H, Rebillot P 2005 J. Appl. Phys. 98043525.
[7] Kenneth A C, Verle W A, Hugh F M 1990 Proc. SPIE 1243 99
[8] Guo H, Feng N, Xiang S M 2005 Proc. SPIE 5644 579
[9] Zhao J, Zhang Y J, Chang B K, Xiong Y J, Zhang J J, Shi F, ChengH C, Cui D X 2011 Acta Phys. Sin. 60 107802 (in Chinese) [赵静,张益军,常本康,熊雅娟,张俊举,石峰,程宏昌,崔东旭 2011 60 107802]
[10] Aspnes D E, Kelso S M, Logan R A, Bhat R 1986 J. Appl. Phys.60 754
[11] Smith A, Passmore K, Sillmon R 2002 New Developments in Photodetection 3rd Beaune Conference Beaune, France, 17–21 June,2002
[12] Liu Y Z, Wang Z C, Dong Y Q 1995 Electron Emission and Photocathode(Beijing: Beijing University of Science and Technology Press) p327 (in Chinese) [刘元震,王仲春,董亚强 1995 电子发射与光电阴极(北京: 北京理工大学出版社)第327页]
[13] Zhang Y J, Niu J, Zhao J, Zou J J, Chang B K, Shi F, Cheng H C2010 J. Appl. Phys. 108 093108
[14] Tang J F, Gu P F, Liu X, Li H F 2006 Modern Optical Thin FilmTechnology (Zhejiang: Zhejiang University Press) p20 (in Chinese) [唐晋发,顾培夫,刘旭,李海峰 2006 现代光学薄膜技术(浙江: 浙江大学出版社)第20页]
[15] Zhao J, Chang B K, Xiong Y J, Zhang Y J 2011 Chin. Phys. B 20047801
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[1] Guo L J, Wüstenberg J P, Oleksiy A, Bauer M, Aeschlimann M2005 Acta Phys. Sin. 54 3200 (in Chinese) [郭立俊, Wüstenberg J P, Oleksiy A, Bauer M, Aeschlimann M 2005 54 3200]
[2] Zhou LW, Li Y, Zhang Z Q, MonastyrskiMA, Schelve M Y 2005Acta Phys. Sin. 54 3591 (in Chinese) [周立伟,李元,张智诠, Monastyrski M A, Schelve M Y 2005 54 3591]
[3] Liu Z, Sun Y, Peterson S, Pianetta P 2008 Appl. Phys. Lett. 92241107
[4] Zhang Y J, Chang B K, Yang Z, Niu J, Zou J J 2009 Chin. Phys.B 18 4541
[5] Sinor T W, Estrera J P, Phillips D L, Rector M K 1997 Proc. SPIE2551 130
[6] Leopold D J, Buckley J H, Rebillot P 2005 J. Appl. Phys. 98043525.
[7] Kenneth A C, Verle W A, Hugh F M 1990 Proc. SPIE 1243 99
[8] Guo H, Feng N, Xiang S M 2005 Proc. SPIE 5644 579
[9] Zhao J, Zhang Y J, Chang B K, Xiong Y J, Zhang J J, Shi F, ChengH C, Cui D X 2011 Acta Phys. Sin. 60 107802 (in Chinese) [赵静,张益军,常本康,熊雅娟,张俊举,石峰,程宏昌,崔东旭 2011 60 107802]
[10] Aspnes D E, Kelso S M, Logan R A, Bhat R 1986 J. Appl. Phys.60 754
[11] Smith A, Passmore K, Sillmon R 2002 New Developments in Photodetection 3rd Beaune Conference Beaune, France, 17–21 June,2002
[12] Liu Y Z, Wang Z C, Dong Y Q 1995 Electron Emission and Photocathode(Beijing: Beijing University of Science and Technology Press) p327 (in Chinese) [刘元震,王仲春,董亚强 1995 电子发射与光电阴极(北京: 北京理工大学出版社)第327页]
[13] Zhang Y J, Niu J, Zhao J, Zou J J, Chang B K, Shi F, Cheng H C2010 J. Appl. Phys. 108 093108
[14] Tang J F, Gu P F, Liu X, Li H F 2006 Modern Optical Thin FilmTechnology (Zhejiang: Zhejiang University Press) p20 (in Chinese) [唐晋发,顾培夫,刘旭,李海峰 2006 现代光学薄膜技术(浙江: 浙江大学出版社)第20页]
[15] Zhao J, Chang B K, Xiong Y J, Zhang Y J 2011 Chin. Phys. B 20047801
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