Patent ID: 6611003
Filing Date: 2003-08-26
Classification: B82Y,H01L,H01S

Abstract:
A light-emitting element of a surface-emitting type, comprising:a substrate having a first surface and a second surface, said substrate being transparent to light with a wavelength of &lgr;; a diffraction grating lens overlying said first surface of said substrate; a first conductive type semiconductor layer overlying said diffraction grating lens; a light emitting layer formed on said first conductive type semiconductor layer and emitting light with a wavelength of &lgr; by current injection; a second conductive type semiconductor layer formed on said light-emitting layer and having an electrode forming surface; a wavefront converter of a material opaque to the light from said light-emitting layer, formed on said second surface of said substrate, and having a small aperture with a diameter smaller than a wavelength of the light, the light from said light-emitting layer passing through said small aperture to be emitted as an output light, said output light including an evanescent wave; a first electrode formed on a surface of said first conductive type semiconductor layer on the side of said light-emitting layer, and electrically connected to said first conductive type semiconductor layer; and a second electrode formed on said electrode forming surface of said second conductive type semiconductor layer, said diffraction grating lens focusing light emitted from said light-emitting layer on said small aperture of said wavefront converter.