Patent ID: 7986721
Filing Date: 2011-07-26
Classification: H01L

Abstract:
1. A semiconductor optical device comprising: a semiconductor substrate of a first conductive type; a first conductive type semiconductor layer provided on the semiconductor substrate and having a first region and a second region, the first and second regions being arranged along a predetermined plane with the second region surrounding the first region; an active layer provided on the first region of the first conductive type semiconductor layer, the active layer having a mesa structure with a top and a side, and a post shape, a bandgap energy of the first conductive type semiconductor layer being greater than that of the active layer; a second conductive type single semiconductor layer provided on the second region of the first conductive type semiconductor layer, the second conductive type single semiconductor layer contacting the top and the side of the mesa structure, a bandgap energy of the second conductive type single semiconductor layer being greater than that of the active layer, and the second conductive type single semiconductor layer and the second region of the first conductive type semiconductor layer constituting a pn junction; a first distributed Bragg reflector portion including first distributed Bragg reflector layers and second distributed Bragg reflector layers, the first and the second distributed Bragg reflector layers being arranged alternately and being of a first conductive type; a second distributed Bragg reflector portion including third distributed Bragg reflector layers and fourth distributed Bragg reflector layers, the third and fourth distributed Bragg reflector layers being arranged alternately and being of a second conductive type different from the first conductive type, the first conductive type semiconductor layer, the active layer and the second conductive type semiconductor layer being provided between the first distributed Bragg reflector portion and the second distributed Bragg reflector layers, and the second distributed Bragg reflector portion being in contact with the second conductive type single semiconductor layer; and an electrode having an aperture and in contact with the second distributed Bragg reflector portion.