Patent ID: 8855160
Filing Date: 2014-10-07
Classification: H01L,H01S

Abstract:
1. A horizontal-cavity surface-emitting laser comprising, on a semiconductor substrate: a cavity structure that includes a multilayer structure obtained by stacking a first conductive-type cladding layer, an active layer for generating light, and a second conductive-type cladding layer in this order and that reflects or resonates light in the in-plane direction; a waveguide layer that is constructed in the cavity structure and has extended regions on the semiconductor substrate to guide the light generated from the active layer; and a reflecting part that is constructed at one end of the waveguide layer and changes the light path of laser light emitted from the cavity structure to emit the laser light from the rear surface of the semiconductor substrate, wherein a first electrode constructed on the semiconductor substrate around a side region of the cavity structure and the reflecting part, and a second electrode constructed on the main surface of the cavity structure, are provided, the first electrode includes a first portion that is constructed along one side region of the reflecting part located in the perpendicular direction to the traveling direction of light guided through the waveguide layer, and a second portion that is constructed along one side region of the cavity structure and the other side region of the reflecting part that are located in the direction parallel to the traveling direction of light guided through the waveguide layer, the shape of the second portion of the first electrode is formed using a rectangle having a first short side provided around a side region of the reflecting part, and a rectangle having a second short side provided around a side region of the cavity structure, and the width of the first short side and the width of the second short side are different from each other.