Patent ID: 8569088
Filing Date: 2013-10-29
Classification: B82Y,H01L,H01S

Abstract:
1. A semiconductor light-emitting element, comprising: a substrate; and a nitride semiconductor multilayer film provided on an upper surface of the substrate and including an active layer that produces light during operation, wherein a recess, a stepped portion, or a protruding portion is formed in an active layer or a layer of the nitride semiconductor multilayer film which contacts a lower surface of the active layer, a ridge stripe, which has a front end facet and a rear end facet facing the front end facet and serves as an optical waveguide, is formed in an upper part of the nitride semiconductor multilayer film, a distance from a lateral center of the ridge stripe to a lateral center of the recess, the stepped portion, or the protruding portion changes continuously or in stages from the front end facet toward the rear end facet, and bandgap energy of the active layer changes continuously or in stages from the front end facet toward the rear end facet, wherein a depth of the recess, a depth of the stepped portion, or a height of the protruding portion changes continuously or in stages from the front end facet toward the rear end facet.