Patent ID: 6770945
Filing Date: 2004-08-03
Classification: G02B,H01L,Y02E

Abstract:
A semiconductor photo-detector, comprising:an intrinsic or a first conduction type semiconductor layer, a photo-absorption layer comprising a superlattice semiconductor layer or a multiple quantum well semiconductor layer, and a schottky electrode which are disposed on a substrate having a top surface and an end surface meeting at an edge; said photo-absorption layer being spaced from said edge of said substrate adjoining said end surface; a semiconductor multilayer structure of large schottky-barrier height having a schottky barrier higher in schottky barrier height than a schottky barrier between said photo-absorption layer and said schottky electrode being formed between said photo-absorption layer and said schottky electrode; and a light incident facet on said end surface forming an acute angle with said top surface, wherein incident light is refracted at said light incident facet and transits said photo-absorption layer at an angle with respect to an orthogonal of said photo-absorption layer.