GaAs Schottky Photodiode Fabricated on Glass Substrate Using Epitaxial Lift-Off Technique

Abstract
We report on a substrate-side-illuminated GaAs Schottky photodiode fabricated on a glass substrate using the epitaxial lift-off technique. An external quantum efficiency in excess of 70% was observed at a wavelength of 780 nm. This is approximately 1.6 times higher than that of a conventional photodiode which has an absorption layer of the same thickness and is illuminated through a semitransparent Schottky window.