Patent ID: 6917032

Claim:
A semiconductor photo-detection device, comprising: a semiconductor photo-detector comprising: a first semiconductor layer having a first conduction type, a second semiconductor layer having a second conduction type, and a photo-absorption part comprising a photo-absorption layer sandwiched between said first semiconductor layer and said second semiconductor layer disposed on a substrate having a top surface and an end surface meeting at an edge; at least said photo-absorption layer being spaced from said edge of said substrate adjoining said end surface; a light incident facet on said end surface forming an acute angle with said top surface; an optical waveguide disposed opposing said light incident facet; and a solid or liquid interposed between said light incident facet and said optical waveguide; wherein incident light from said optical waveguide applied to said light incident facet 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.