Patent ID: 7796665
Filing Date: 2010-09-14
Classification: B82Y,H01S

Abstract:
1. A surface emitting laser that oscillates at a wavelength λ, comprising: a multilayer mirror; an active layer; and a photonic crystal layer whose refractive index changes periodically within a plane parallel to a substrate, wherein the multilayer, the active layer, and the photonic crystal layer are laminated in a direction perpendicular to the substrate, wherein the photonic crystal layer separates incident light having a wavelength λ perpendicularly incident on the photonic crystal layer into at least a transmitted light and a diffracted light, wherein the multilayer minor has a reflectance with regard to the diffracted light which is higher than reflectance with regard to the transmitted light, wherein a waveguide including the photonic crystal layer and the multilayer mirror has a resonant mode within a plane parallel to the substrate, and wherein the photonic crystal layer is so configured as to diffract light of the resonant mode into a direction perpendicular to the substrate.