阴极
材料科学
薄膜
光电子学
纳米技术
电气工程
工程类
作者
M. Kuriki,Z Liptak,Lei Guo,X. Jin,Naoto Yamamoto
出处
期刊:Journal of physics
[IOP Publishing]
日期:2024-01-01
卷期号:2687 (2): 022015-022015
标识
DOI:10.1088/1742-6596/2687/2/022015
摘要
Abstract GaAs cathodes are unique devices which generate a spin-polarized electron beam by the photoelectric effect when illuminated with a circularly polarized laser. Thin-film Negative Electron Affinity (NEA) surfaces have an essential role in spin polarized beam production, but they have limited lifetimes. In this study, we activate GaAs as an NEA cathode by evaporating Cs, K, and Sb metal on its cleaned surface. The experimental results of quantum efficiency measurements taken after evaporative deposition of the multi-alkali surface are presented here.
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