Colloidal Lithography-Enabled Creation of Metasurface-Integrated MicroLEDs and Devices
Tech ID: 30112 / UC Case 2019-180-0
A resonant-cavity device that utilizes stimulated emission efficiency and/or narrows the emission angular profile.
As III-nitride lighting and display technologies continue improving in luminous efficacy, the realizable light-emitting diode (LED) pixel sizes for near-eye and high-resolution displays continue to decrease. When these LED devices are miniaturized, especially for sizes below 100 microns, maintaining color rendering and resolution becomes a challenge due to the lack of control over the angular emission profile of individual devices or pixels, which ultimately leads to cross-talk with neighboring pixels. Enhancing efficiency through stimulating emission or narrowing the emission angular profile would help solve this issue.
Researchers at the University of California, Santa Barbara have developed a resonant-cavity device that utilizes stimulated emission efficiency and/or narrows the emission angular profile. This invention presents a method for fabricating metasurface-integrated microLED devices, with several general device manifestations intended for enhanced and controllable, directional light emission. The application of colloidal-based lithography allows this device to be a tunable and scalable platform to enable fabrication of directional microLEDs, and addresses the challenges of pixel crosstalk for small-scale LED device applications.
- Enhanced efficiency, produces up to 10-100 square centimeters of patterned material per hour
- Increased theoretical display density, manipulation of display viewing angle, and holographic projection
- Scalable and wavelength-tunable platform
- Quasi-ordered features on length scales
- Directionally-emitting LEDs
- HCG-integrated LEDs
- Micron-scale LEDs