Patent ID: 8759812
Filing Date: 2014-06-24
Classification: B82Y,H01S

Abstract:
1. A semiconductor light emitting device configured to emit light by energy relaxation of an electron between subbands of a plurality of quantum wells, the device comprising: an active layer provided in a stripe shape extending in a direction parallel to an emission direction of the light, including the plurality of quantum wells, and emitting the light with a wavelength of 10 μm or more; and at least a pair of cladding layers provided along the extending direction in the stripe shape and having a lower refractive index than the active layer, each of the cladding layers being provided both on the active layer and under the active layer respectively, and at least one portion of the cladding layers containing a material having a different lattice constant from the active layer and having a lower optical absorption at a wavelength of the light than the other portion containing a material lattice-matched to the active layer.