Colloidal Lithography-Enabled Creation of Metasurface-Integrated MicroLEDs and Devices

Tech ID: 30112 / UC Case 2019-180-0

Brief Description

A resonant-cavity device that utilizes stimulated emission efficiency and/or narrows the emission angular profile.

Background

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.

Description

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.

Advantages

  • 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

Applications

  •  Directionally-emitting LEDs
  •  HCG-integrated LEDs
  •  Micron-scale LEDs

Patent Status

Patent Pending

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Inventors

Other Information

Keywords

SSLEEC, LED, Laser Diode, MicroLED, Light-Emitting Diode, Emission Angular Profile, Emission Stimulation, Metasurface, Colloidal-Based Lithography

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