Patent ID: 9748440
Date: 2017-08-29
CPC Classifications: H01L,H01S

Claim:
1. A device, comprising: a semiconductor layer comprising a plurality of compositional inhomogeneous regions, wherein a difference between an average band gap for the plurality of compositional inhomogeneous regions and an average band gap for a remaining portion of the semiconductor layer is at least 26 meV, wherein a characteristic size of each of the plurality of compositional inhomogeneous regions is smaller than an inverse of a dislocation density for the semiconductor layer, and wherein the plurality of compositional inhomogeneous regions includes large scale compositional inhomogeneous regions and small scale inhomogeneous regions, the large scale compositional inhomogeneous regions having large lateral areas and the small scale compositional inhomogeneous regions having small lateral areas, wherein the large scale compositional inhomogeneous regions are larger than the square of a characteristic distance between threading dislocations and the small scale compositional inhomogeneous regions are smaller than the square of the characteristic distance between the threading dislocations.