Patent ID: 8331410

Claim:
A light emitting device for providing light emission at a selected wavelength comprising: a first distributed Bragg reflector positioned on a supporting substrate; a first spacer of single crystal dielectric material positioned on the first distributed Bragg reflector, the first spacer having a first surface; an active area including single crystal erbium dielectric material positioned on the first surface of the first spacer, the erbium dielectric material and the single crystal dielectric material of the first spacer being substantially crystal lattice matched at the first surface, the active area being formed to emit light at a normal wavelength for the single crystal erbium dielectric material; and a second spacer of single crystal dielectric material with a second surface, the second spacer being positioned on the active area, and the erbium dielectric material and the single crystal dielectric material of the second spacer being substantially crystal lattice matched at the second surface and the light emission at a selected wavelength from the device is stimulated emission.