Patent ID: 6724013
Filing Date: 2004-04-20
Classification: B82Y,H01S

Abstract:
A semiconductor laser structure comprising:a substrate; a plurality of III-V nitride semiconductor layers formed on said substrate, at least one of said plurality of III-V nitride semiconductor layers forms an active region over a n-type cladding layer; a first semiconductor layer being p-type nitride material formed on the active region, the first semiconductor layer including a blocking layer to prevent leakage of electrons injected into the active layer from leaking out of the blocking layer, the first semiconductor layer further including a hole injection layer over the blocking layer, the bandgap of the blocking layer being larger than the bandgap of the hole injection layer; a second semiconductor layer formed on said first semiconductor layer, said second semiconductor layer being an n-type nitride, a tunnel junction disposed between said first semiconductor layer and said second semiconductor layer for injecting current into said active region, said blocking layer preventing electrons from leaking from said blocking layer to the tunnel junction; and wherein a sufficient forward bias is applied to said active region to cause lasing from an edge of said semiconductor laser structure.