Patent ID: 7772586
Filing Date: 2010-08-10
Classification: B82Y,H01L,H01S

Abstract:
1. An optical semiconductor device, comprising an n-type cladding layer, an active layer and a p-type cladding layer on an InP substrate, wherein said p-type cladding layer has a superlattice structure comprising plural first layers and plural second layers alternately laminated; each of said first layers employs MgZnCdSe, each of said second layers employs ZnTe; a p-type carrier concentration of the p-type cladding layer having said first layers and said second layers is equal to or larger than 1×10 a layer thickness of each of said first layers is larger than that of each of said second layers, and a band gap width of each of said first layers is larger than that of each of said second layers.