Patent ID: 7804869
Filing Date: 2010-09-28
Classification: B82Y,H01S

Abstract:
1. A semiconductor device comprising: an n-side waveguide layer; an active layer in contact with the n-side waveguide layer; a p-side waveguide layer in contact with the active layer; an electron blocking layer in contact with the p-side waveguide layer, the electron blocking layer comprising a first composition of two elements from group III of the periodic table and an element from group V of the periodic table; and a cladding layer, the cladding layer including a first cladding sublayer in contact with the electron blocking layer and in contact with a second cladding sublayer, the first cladding sublayer being disposed between the second cladding sublayer and the electron blocking layer; wherein the first cladding sublayer comprises a second composition of two elements from group III of the periodic table and an element from group V of the periodic table, the second composition being different from the first composition; and wherein the first cladding sublayer has a higher conduction band level than the second cladding sublayer.