Comparison of photoemission performance of a GaAs photocathode between white light and monochromatic light illumination during activation

Feng Cheng; Liu Jian; Zhang Yijun; Qian Yunsheng; Song Yufei; Bao Yongqiang; Zhao Jing

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Comparison of photoemission performance of a GaAs photocathode between white light and monochromatic light illumination during activation

机译：在激活期间白光与单色光照射之间的GaAs光电阴极的光曝光性能的比较

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To obtain higher quantum efficiency and longer operational lifetime of negative-electron-affinity GaAs-based photocathodes, illumination conditions using different light sources during the activation process are explored. GaAs photocathodes were activated under white light and 633 nm monochromatic light with different intensities, and experimental quantum efficiencies and photocurrent degradations were compared after activation and recaesiation. The results show that GaAs photocathode can obtain higher quantum efficiency and longer lifetime by using illumination of 633 nm monochromatic light, and this advantage can hardly be achieved by adjusting the intensity of white light. This work verifies an improved solution for preparing GaAs-based photocathodes with satisfactory capability. (C) 2019 Optical Society of America

机译：为了获得较高的量子效率和基于负电子亲和GaAs的光电处理的更高量子效率和较长的操作寿命，探讨了在激活过程中使用不同光源的照明条件。在白光下激活GaAs光电域，并在激活和再生后比较了633nm单色光，并在激活和再生后进行实验量子效率和光电流降解。结果表明，通过使用633nm单色光的照明，GaAs光电阴极可以获得更高的量子效率和更长的寿命，并且通过调节白光强度，几乎不能实现这种优势。这项工作验证了一种改进的解决方案，用于以满意的能力制备基于GaAs的光电阴极。（c）2019年光学学会

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《Applied optics》 |2019年第32期|共6页
作者
Feng Cheng; Liu Jian; Zhang Yijun; Qian Yunsheng; Song Yufei; Bao Yongqiang; Zhao Jing;
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作者单位

Nanjing Inst Technol Sch Informat &

Commun Engn Nanjing 211167 Jiangsu Peoples R China;

Nanjing Univ Sci &

Technol Sch Elect &

Opt Engn Nanjing 210094 Jiangsu Peoples R China;

Nanjing Univ Sci &

Technol Sch Elect &

Opt Engn Nanjing 210094 Jiangsu Peoples R China;

Nanjing Univ Sci &

Technol Sch Elect &

Opt Engn Nanjing 210094 Jiangsu Peoples R China;

Nanjing Inst Technol Sch Informat &

Commun Engn Nanjing 211167 Jiangsu Peoples R China;

Nanjing Inst Technol Sch Informat &

Commun Engn Nanjing 211167 Jiangsu Peoples R China;

Nanjing Inst Technol Sch Informat &

Commun Engn Nanjing 211167 Jiangsu Peoples R China;

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Comparison of photoemission performance of a GaAs photocathode between white light and monochromatic light illumination during activation

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