Resolution characteristics of graded band-gap reflection-mode AlGaAs/GaAs photocathodes

Deng, Wenjuan; Zhang, Daoli; Zou, Ji‐Jun; Peng, Xincun; Wang, Weilu; Zhang, Yijun; Chang, Benkang

doi:10.1016/j.optcom.2015.08.010

Cited by 3 publications

(1 citation statement)

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“…illumination detection research [8]. By analyzing the limited resolution, the detail resolution of the image can be provided [9]. Particularly, transmission-mode GaAs photocathode has been extensively developed in the field of low-light-level imaging due to the high quantum efficiency, small dark emission, adjustable long-wave threshold, and large long-wave response expansion potential [10][11][12][13].…”

Section: Introduction Owadaysmentioning

confidence: 99%

Modelling the Light Scattering Behavior of Transmission-Mode GaAs Photocathode Under the AlGaAs Window Layer Rough Surface

Guo

Shi

Jia³

et al. 2023

IEEE Photonics J.

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To improve the understanding of the optical image resolution of transmission-mode GaAs photocathode, by establishing the surface scattering analysis model of AlGaAs window layer, we have researched the effect of the surface height distribution variance σ on scattering surface transfer function (STF) and point spread function (PSF) of transmission-mode GaAs photocathode. The simulation results show that the decrease of surface height distribution variance σ is beneficial to improve the optical image resolution. This improvement is mainly attributed to the decrease in input light energy attenuation and spatial diffusion caused by smaller surface height distribution variance σ, and thus the signal to noise ratio of scattering degraded optical image is increased.

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