Semiconductor photoreceiving device

摘要

The present invention provides a photoreceiving device that is inexpensive and has good properties as a photoreceiving device for selectively receiving long wavelength light. This is a semiconductor photoreceiving device 10 for selectively receiving long wavelength light from multiplexed light including long wavelength light A and short wavelength light B. This photoreceiving device comprises a multilayered film 22 comprising alternately stacked layers of materials having mutually different indexes of refraction and the thicknesses and number of which are designed so as to transmit said long wavelength light and reflect said short wavelength light; and a first light-absorbing layer 14 composed of a material having a band gap wavelength longer than the wavelength of said long wavelength light.