K2SbCs光电阴极光谱响应特性模拟  

Theoretical Investigation of Spectral Response Characteristics of K_2SbCs Photoelectric Cathode

作　　者：赵敏 孙建宁[2,3] 钱芸生[4] 司曙光 金睦淳[2] 刘健[4] 侯巍[2] ZHAO Min;SUN Jianning;QIAN Yunsheng;SI Shuguang;JIN Muchun;LIU Jian;HOU Wei(Institute of Physics in Kunming,Kunming 650223,China;Northern Night Vision Technology Co.Ltd,Nanjing 211106,China;Nanjing University of Science and Technology,Nanjing 210094,China;Science and Technology on Low-Light-Level Night Vision Laboratory,Xi’an 710065,China)

机构地区：[1]昆明物理研究所,云南昆明650223 [2]北方夜视技术股份有限公司南京分公司,江苏南京211106 [3]微光夜视技术重点实验室,陕西西安710065 [4]南京理工大学,江苏南京210094

出　　处：《红外技术》2018年第3期289-293,共5页Infrared Technology

基　　金：国家重大科学仪器设备开发专项(2016YFF0100400)。

摘　　要：为了探索高性能K_2SbCs光电阴极的特征结构,对光电阴极量子效率公式进行了推导,并利用推导出的公式对K_2SbCs光电阴极量子效率(≈30%)曲线进行拟合,得到拟合相对误差较小结构参数。另外,根据拟合结果分析了对光谱响应造成影响的因素,包括阴极厚度、光电逸出深度、阴极结构参量、光谱响应截止波长等。探索了该光电阴极结构参数范围,据此分析并设计高性能透射式K_2CsSb光电阴极。We report a theoretical investigation of the characteristics of high-performance K2SbCs photocathode.First,we derived a modified formula for the photocathode quantum efficiency.The quantum efficiency(≈30%)curve of the K2SbCs photocathode was then fitted using the modified formula,and the structural parameters were extracted with in reasonable error limits.Next,the fitting results were used to analyze the factors affecting the spectral response,such as the cathode thickness,escape depth of the excited photoelectrons,structure parameters of the cathode,and cut-off wavelength of the spectral response.Finally,the range of parameters affecting the photocathode structure was explored.Our study will be helpful in designing high-performance transmission-mode K2CsSb photocathodes.

关 键 词：K2SbCs光电阴极 量子效率 积分灵敏度 光学性能 

分 类 号：TN203[电子电信—物理电子学]