Comparison of photoemission characteristics between square and circular wire array GaAs photocathodes

Deng Wenjuan; Peng Xincun; Zou Jijun; Wang Weilu; Liu Yun; Zhang Tao; Zhang Yijun; Zhang Daoli

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Comparison of photoemission characteristics between square and circular wire array GaAs photocathodes

机译：方形和圆形线阵列GaAs光电阴极光电特性的比较

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Two types of negative electron affinity gallium arsenide (GaAs) wire array photocathodes were fabricated by reactive ion etching and inductively coupled plasma etching of bulk GaAs material. High density GaAs wire arrays with high periodicity and good morphology were verified using scanning electron microscopy, and photoluminescence spectra confirmed the wire arrays had good crystalline quality. Reflection spectra showed that circular GaAs wire arrays had superior light trapping compared with square ones. However, after Cs/O activation, the square GaAs wire array photocathodes showed enhanced spectral response. The integral sensitivity of the square wire array photocathodes was approximately 2.8 times that of the circular arrays. (C) 2017 Optical Society of America

机译：通过反应离子蚀刻和散装GaAs材料的反应离子蚀刻和电感耦合等离子体蚀刻制造两种类型的负电子亲和力镓砷（GaAs）线阵列光电池。使用扫描电子显微镜验证具有高周期性和良好形态的高密度GaAs线阵列，光致发光光谱证实了线阵列具有良好的晶体质量。反射光谱表明，与正方形的相比，圆形GaAs线阵列具有优异的光捕获。然而，在CS / O激活之后，方形GaAs线阵列光电阴极显示出增强的光谱响应。方形线阵列光电阴极的整体灵敏度约为圆形阵列的2.8倍。（c）2017年光学学会

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来源
《Applied optics》 |2017年第32期|共5页
作者
Deng Wenjuan; Peng Xincun; Zou Jijun; Wang Weilu; Liu Yun; Zhang Tao; Zhang Yijun; Zhang Daoli;
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Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

East China Univ Technol Engn Res Ctr New Energy Technol Jiangxi Prov Nanchang 330013 Jiangxi Peoples R China;

East China Univ Technol Engn Res Ctr New Energy Technol Jiangxi Prov Nanchang 330013 Jiangxi Peoples R China;

East China Univ Technol Engn Res Ctr New Energy Technol Jiangxi Prov Nanchang 330013 Jiangxi Peoples R China;

East China Univ Technol Engn Res Ctr New Energy Technol Jiangxi Prov Nanchang 330013 Jiangxi Peoples R China;

East China Univ Technol Engn Res Ctr New Energy Technol Jiangxi Prov Nanchang 330013 Jiangxi Peoples R China;

Nanjing Univ Sci &

Technol Sch Elect &

Opt Engn Nanjing 210094 Jiangsu Peoples R China;

Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

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Comparison of photoemission characteristics between square and circular wire array GaAs photocathodes

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