Photo-receiving device, and method of fabricating a photo-device

摘要

A high-speed, high-sensitivity photo-receiving device has a light-absorbing substrate 11, on which a pair of electrodes 12 are provided. An insulative optical guide 15 is located over an exposed surface portion of the substrate constituting an optical window 13. The optical guide is permeable to incident light, and the width of the optical guide does not exceed the wavelength of the incident light.