Patent ID: 6323507
Filing Date: 2001-11-27
Classification: H01S

Abstract:
A semiconductor photonic element comprising:(a) a semiconductor substrate having a first surface and a second surface opposite to the first surface;(b) a mesa structure formed on said first surface of said substrate to extend in a specific direction;said mesa structure including an active layer and a pair of p- and n-type cladding layers located respectively at top and bottom sides of said active layer, forming a double heterojunction;(c) a multilayer current-constricting structure for constricting an injection current;said current-constricting structure being formed at each side of said mesa structure to expose a top of said mesa structure from said current-constricting structure;said current-constricting structure comprising a first current-blocking part and a second current-blocking part;said first current-blocking part having a dielectric current-blocking layer that extends to said mesa structure;said dielectric current-blocking layer being contacted with top edges of said mesa structure;said second current-blocking part having a semiconductor current-blocking layer; and(d) a semiconductor burying layer formed to cover said mesa structure and said multilayer current-constricting structure;said semiconductor burying layer being contacted with said top of said mesa structure.