“…AlGaN-based solar-blind photodetectors with high solar rejection and high activity performance were demonstrated for a wide range of commercial and military applications, such as ozone layer monitoring, sterilization/detection of biological and chemical agents, flame detection/fire alarms, engine monitoring, secure intersatellite communication, and missile plume detection [3][4][5]. The AlGaN-photocathodebased image intensifier also has low noise ratio, high sensitivity, and high responsivity, and was one of the best devices used to make a high-performance UV detector [6,7]. A few studies have also been reported on transmission-mode AlGaN photocathodes.…”