Optimization of Transmission Mode Metallic (Aluminum) Photocathodes

Abstract Transmission mode metallic photocathodes are studied, especially for aluminum ones, to test complete 8“x8” largearea planar photodetectors in ambient condition. We have derived a quantitative model for transmission mode metallic photocathodes which permits optimization of the thickness of these cathodes (approximately 15∼20 nm) and estimation of quantum efficiency based on the theory and the known parameters from the literatures.