Patents by Inventor Barrett Spells

Barrett Spells 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).

  • Two-color barrier photodetector with dilute-nitride active region
    Patent number: 9698192
    Abstract: Embodiments described herein relate to a dual-band photodetector. The dual-band photodetector includes a barrier layer (10) disposed between two infrared absorption layers (8, 12) wherein the barrier layer (10) is lattice matched to at least one of the infrared absorption layers (8, 12). Furthermore, one infrared absorption layer includes dilute nitride to adjust the band gap to a desired cut-off wavelength while maintaining valence-band alignment with the barrier layer. Embodiments also relate to a system and processes for producing the photodetector fabricated from semiconductor materials.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: July 4, 2017
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Adam M. Crook, Matthew J. Reason, Barrett Spells