Monolithic integration of a tunable photodetector based on InP/air-gap Fabry-Pérot filters

Abstract

We present a tunable photodetector MEMS device consisting of an InP/air-gap Fabry-Perot filter combined with a pin-photodiode structure. Epitaxial growth and advanced surface micromachining are used for the monolithic integration of both devices. Special process steps regarding detector geometry, photo current and signal quality have been investigated to assure high performance.