Patent ID: 8718110
Filing Date: 2014-05-06
Classification: B82Y,H01S

Abstract:
1. A nitride semiconductor laser comprising: an electrically conductive support substrate with a primary surface, the primary surface comprising a gallium nitride based semiconductor; an active layer provided on the primary surface; and a p-type cladding region provided on the primary surface, the primary surface being inclined relative to a reference plane perpendicular to a reference axis, the reference axis extending in a direction of a c-axis of the gallium nitride based semiconductor, the active layer being provided between the support substrate and the p-type cladding region, the p-type cladding region including a first p-type Group III nitride semiconductor layer and a second p-type Group III nitride semiconductor layer, the first p-type Group III nitride semiconductor layer comprising an InAlGaN layer, the second p-type Group III nitride semiconductor layer comprising a semiconductor different from a material of the InAlGaN layer, the InAlGaN layer including built-in anisotropic strain, the first p-type Group III nitride semiconductor layer being provided between the second p-type Group III nitride semiconductor layer and the active layer, and a resistivity of the second p-type Group III nitride semiconductor layer being lower than a resistivity of the first p-type Group III nitride semiconductor layer.