Patent ID: 8917750
Filing Date: 2014-12-23
Classification: B82Y,H01S

Abstract:
1. A III-nitride semiconductor laser diode to emit light at a wavelength of not less than 490 nm, comprising: a support base comprising a III-nitride, the support base including a primary surface, and the primary surface having one of semipolar nature and nonpolar nature; an n-type cladding region provided above the support base; a p-type cladding region provided above the support base; and a core semiconductor region provided between the p-type cladding region and the n-type cladding region, the n-type cladding region comprising an n-type gallium nitride based semiconductor, the p-type cladding region comprising a p-type gallium nitride based semiconductor, the core semiconductor region comprising a first optical guide layer, an active layer and a second optical guide layer, the first optical guide layer including a first GaN layer, the second optical guide layer including a second GaN layer and a second InGaN layer, the active layer being in physical contact with the second InGaN layer, the second InGaN layer being in physical contact with the second GaN layer; the second GaN layer being in physical contact with the p-type cladding region, the active layer being provided between the first optical guide layer and the second optical guide layer, and a total thickness of the first GaN layer and the second GaN layer being not less than 600 nm, wherein the primary surface is inclined at an inclination angle in one of a range of not less than 63 degrees and not more than 80 degrees and a range of not less than 100 degrees and not more than 117 degrees with reference to a reference plane perpendicular to a c-axis of the III-nitride in a direction from the c-axis to an m-axis of the III-nitride.