TRANSMISSION PHOTOCATHODES

摘要

A transmission photodetector operable at wavelengths greater than 0.86 micrometers comprising a substrate transparent to the radiation to be detected, at least one epitaxial intermediate layer comprising (Ga1-xAlx)1-yInyAs and an epitaxial p-type Ga1-yInyAs detector layer. The said one intermediate layer may be p-type. If desired a second epitaxial intermediate layer comprising (Ga1-xAlx)1-zInzAs may be provided between the substrate and the said one intermediate layer. In the foregoing 0