Patent ID: 8379686
Filing Date: 2013-02-19
Classification: H01S

Abstract:
1. A two-dimensional photonic crystal surface-emitting laser light source, comprising: a) a substrate made of a material that is transparent to light having an objective wavelength; b) a laser oscillator including an active layer and a two-dimensional photonic crystal, wherein light is generated within the active layer and is amplified in the active layer itself, wherein the wavelength of the light is fixed to the objective wavelength, the two-dimensional photonic crystal including a plate-shaped body material in which a large number of modified refractive index areas whose refractive index differs from that of the body material are periodically arranged, and wherein the laser oscillator is located below the substrate; c) a mount layer for mounting the two-dimensional photonic crystal emission laser light source on an external base member, where the mount layer is located below the two-dimensional photonic crystal and the active layer in such a manner where a distance between a lower surface of the mount layer and the active layer is smaller than a distance between an upper surface of the substrate and the active layer; d) a window-shaped electrode on the upper surface of the substrate, where the electrode has a window for emitting laser light having the objective wavelength therethrough; e) a mount surface electrode located on the lower surface of the mount layer and having an area smaller than that of the window-shaped electrode inclusive of an area of the window; and f) a reflector for reflecting the laser light having the objective wavelength, where the reflector is provided below the laser oscillator, wherein: a majority of the emitted laser light is emitted through the window-shaped electrode, the modified refractive index areas are arranged in a square lattice pattern and have an asymmetrical shape with respect to at least one of axes of the square lattice pattern, and the modified refractive index areas have an equilateral-triangular shape.