Patent ID: 6831302
Filing Date: 2004-12-14
Classification: H01L,H01S

Abstract:
A light-emitting device, comprising:a multi-layer stack of materials including a layer of n-doped material, a layer of p-doped material, and a light-generating region; and a layer of reflective material that is capable of reflecting at least about 50% of light generated by the light-generating region that impinges on the layer of reflective material, wherein: a surface of the layer of n-doped material is configured so that light generated by the light-generating region can emerge from the light-emitting device via the surface of the layer of n-doped material; the surface of the layer of n-doped material has a dielectric function that varies spatially according to a pattern; a distance between the layer of p-doped material and the layer of reflective material is less than a distance between the layer of n-doped material and the layer of reflective material; and the pattern does not extend into the light-generating region.