Patent ID: 7804882
Filing Date: 2010-09-28
Classification: B82Y,H01S

Abstract:
1. A nitride semiconductor laser element, comprising a substrate and a nitride semiconductor layer in which a first semiconductor layer, an active layer, and a second semiconductor layer are laminated in a laminating direction in this order on the substrate, wherein a light emission face extends in a direction generally parallel to the laminating direction so that light is emitted from the light emission face in a direction generally perpendicular to the laminating direction, recessed and raised portions are formed in the first semiconductor layer and/or the second semiconductor layer, a semiconductor layer that embeds the recessed and raised portions are formed on the semiconductor layer in which said recessed and raised portions are formed, the semiconductor layer in which the recessed and raised portions are formed is equipped with a side face having a first region extending downward and a second region extending farther downward continuously from the first region, the second region has a greater slope with respect to the normal direction of the substrate than the first region, and the side face in the first region has a substantially constant slope angle, and the side face in the second region has a substantially constant slope angle that is different from the slope angle in the first region.