Spontaneous/stimulated light emitting μ-cavity device
View Patent ↗A light emitting device with a μ-cavity including a first spacer of single crystal dielectric material and an active area including single crystal erbium dielectric material positioned on the first spacer. The erbium dielectric material and the single crystal dielectric material of the first spacer are substantially crystal lattice matched at their juncture. A second spacer of single crystal dielectric material is positioned on the active area. The erbium dielectric material and the single crystal dielectric material of the second spacer are substantially crystal lattice matched at the second surface. The high-κ erbium dielectric provides a high gain μ-cavity that emits increased amounts of light in either spontaneous or stimulated modes of operation.
1. 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.
2. A light emitting device as claimed in claim 1 further including a second distributed Bragg reflector positioned on the second spacer.
3. A light emitting device as claimed in claim 2 wherein the selected wavelength of the light emission from the device is different than the normal wavelength of the active region, and at least the active region and the second spacer have thicknesses designed to shift the light emission from the normal wavelength to the selected wavelength.
4. A light emitting device as claimed in claim 1 wherein the single crystal erbium dielectric material includes one of erbium oxide, erbium nitride, and erbium oxy-nitride.
5. A light emitting device as claimed in claim 4 wherein the single crystal erbium dielectric material includes erbium oxide.
6. A light emitting device as claimed in claim 1 wherein the single crystal dielectric material of the first spacer includes a silicon dielectric material.
7. A light emitting device as claimed in claim 6 wherein the single crystal silicon dielectric material includes one of silicon oxide, silicon nitride, and silicon oxy-nitride.
8. A light emitting device as claimed in claim 1 wherein the single crystal dielectric material of the second spacer includes a silicon dielectric material.
9. A light emitting device as claimed in claim 8 wherein the single crystal silicon dielectric material includes one of silicon oxide, silicon nitride, and silicon oxy-nitride.