Patents by Inventor James R. Nagel

James R. Nagel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Efficient light extraction from weakly-coupled dielectric buttes
    Patent number: 9196763
    Abstract: A light emitting diode (LED) with weakly-coupled dielectric buttes deposited along the surface is disclosed. The buttes improve light extraction from a distributed volume of incoherent sources in a high-index substrate, as well as from light backscattered by a rear metallic contact. A lattice arrangement for the buttes maximizes area coverage, subject to the constraint of weak evanescent wave coupling between them. The butte distribution may be fabricated by epitaxial deposition above a current spreading layer, followed by photolithographic patterning and etching.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: November 24, 2015
    Assignee: Terahertz Device Corporation
    Inventors: James R. Nagel, Mark S. Miller
  • EFFICIENT LIGHT EXTRACTION FROM WEAKLY-COUPLED DIELECTRIC BUTTES
    Publication number: 20150115221
    Abstract: A light emitting diode (LED) with weakly-coupled dielectric buttes deposited along the surface is disclosed. The buttes improve light extraction from a distributed volume of incoherent sources in a high-index substrate, as well as from light backscattered by a rear metallic contact. A lattice arrangement for the buttes maximizes area coverage, subject to the constraint of weak evanescent wave coupling between them. The butte distribution may be fabricated by epitaxial deposition above a current spreading layer, followed by photolithographic patterning and etching.
    Type: Application
    Filed: October 30, 2014
    Publication date: April 30, 2015
    Inventors: James R. Nagel, Mark S. Miller