Open AccessEffect of vacuum treatment on CsI photocathode performance in UV photon detectors
Author(s) -
Baishali Garai,
V. Radhakrishna,
K. Rajanna
Publication year - 2013
Publication title -
optical materials express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 66
ISSN - 2159-3930
DOI - 10.1364/ome.3.000948
Subject(s) - photocathode , materials science , optics , optoelectronics , detector , photon , vacuum ultraviolet , photodetector , physics , electron , nuclear physics
CsI can be used as a photocathode material in UV photon detectors. The detection efficiency of the detector strongly depends on the photoemission property of the photocathode. CsI is very hygroscopic in nature. This limits the photoelectron yield from the photocathode when exposed to humid air even for a short duration during photocathode mounting or transfer. We report here on the improvement of photoemission properties of both thick (300 nm) and thin (30 nm) UV-sensitive CsI film exposed to humid air by the process of vacuum treatment. (C) 2013 Optical Society of Americ