A semiconductor photodetection device includes a light incident facet for receiving
light from an optical waveguide. Light received at the light incident facet is
refracted through a photo-absorption layer to register photonic events. A material
may be introduced between the optical waveguide and the light incident facet to
improve responsiveness of the device. The light incident facet may be at an angle
to the direction of the light emitted from the optical waveguide to cause the incident
light to be refracted through several layers of the semiconductor photodetection device.
