Patent ID: 6927422

Claim:
A double heterojunction light emitting device, comprising: an n-type semiconductor cladding layer selected from a group consisting of 3C—SiC, 4H—SiC, 6H—SiC and diamond; said n-type cladding layer having an outer surface and having a first generally flat surface; a plurality of quantum dots formed of one or more indirect band gap materials selected from a group consisting of Ge, SiGe, SiGeC, 3C—SiC, and hexagonal SiC on said first generally flat surface; each of said quantum dots having a thickness measured generally perpendicular to said first generally flat surface that is no greater than about 250 Angstroms; said plurality of quantum dots defining a second generally flat surface that is spaced from and generally parallel to said first generally flat surface; a p-type semiconductor cladding layer selected from a group consisting of 3C—SiC, 4H—SiC, 6H—SiC and diamond; said p-type cladding layer having an outer surface and having a third generally flat surface that is direct-wafer-bonded to said second generally flat surface; a first metal contact on said outer surface of said n-type cladding layer; and a second metal contact on said outer surface of said p-type cladding layer.