Polarization direction of optical devices using selected spatial configurations
View Patent ↗A GaN based light emitting diode device which emits polarized light or light of various degrees of polarization for use in the creation of optical devices. The die are cut to different shapes, or contain some indicia that are used to represent the configuration of the weak dipole plane and the strong dipole plane. This allows for the more efficient manufacturing of such light emitting diode based optical devices.
1. A light emitting diode device comprising:
a gallium-containing substrate comprising a shape including a width and a length, the width (W) and the length (L) being different in magnitude, wherein the shape is similar to a rectangular shape in which one side is cut at an angle; and
an LED device provided on the gallium-containing substrate and configured to emit partially or fully polarized electromagnetic radiation, the polarized electromagnetic radiation comprising a weak dipole plane and a strong dipole plane, the weak dipole plane being orthogonal to the strong dipole plane, the strong dipole plane being parallel or perpendicular to the width of the substrate.
2. The diode of claim 1 wherein the gallium-containing substrate comprises a semi-polar GaN substrate.
3. The diode of claim 1 wherein the gallium-containing substrate comprises a non-polar GaN substrate.
4. The diode of claim 1 wherein the length and the width are characterized by an aspect ratio (L/W) of 1.5 and greater.
5. The diode of claim 1 wherein the length and the width are characterized by an aspect ratio (L/W) of 2 and greater.
6. The diode of claim 1 wherein the gallium-containing substrate comprises a gallium species and a nitrogen species.
7. The diode of claim 1 wherein the LED device is formed on a semi-polar plane of the gallium-containing substrate.
8. The diode of claim 1 wherein the LED device is formed on a non-polar plane of the gallium-containing substrate.
9. The diode of claim 1 wherein the gallium-containing substrate is characterized by a wurtzite crystalline structure.
10. An optical device comprising:
two or more GaN substrates configured in a package, each of the GaN substrates characterized by a shape including a width and a length, the width (W) and the length (L) being different in magnitude, wherein the shape is similar to a rectangular shape in which one side is cut at an angle; and
an LED device provided on each of the GaN substrates, the LED device being configured to emit partially or fully polarized electromagnetic radiation, the polarized electromagnetic radiation comprising a weak dipole plane and a strong dipole plane, the weak dipole plane being orthogonal to the strong dipole plane, the strong dipole plane being parallel or perpendicular to the width of the GaN substrate.
11. The device of claim 10 wherein at least one of the GaN substrates comprises a semipolar GaN substrate.
12. The device of claim 10 wherein at least one of the GaN substrates comprises a non-polar GaN substrate.
13. The device of claim 10 wherein each of the LED devices is configured to emit the polarized electromagnetic radiation in a common direction.