Patents by Inventor Benjamin Stanford Williams

Benjamin Stanford Williams 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).

  • INHOMOGENEOUS FOCUSING AND BROADBAND METASURFACE QUANTUM-CASCADE LASERS
    Publication number: 20200067281
    Abstract: A reflectarray metasurface for quantum-cascade lasing includes: (1) a substrate; and (2) an array of subcavities disposed on the substrate. Each subcavity in the array of subcavities includes (a) a first metallic layer disposed on the substrate; (b) a layer of a quantum-cascade laser active material disposed on the first metallic layer; and (c) a second metallic layer disposed on the layer of the quantum-cascade laser active material. At least some subcavities in the array of subcavities have inhomogeneous widths, and the array of subcavities is configured to reflect an incident light of at least one resonant frequency with amplification.
    Type: Application
    Filed: October 5, 2017
    Publication date: February 27, 2020
    Inventors: Christopher CURWEN, Benjamin Stanford WILLIAMS, Luyao XU
  • Quantum cascade external cavity laser with metasurfaces
    Patent number: 9728930
    Abstract: A metasurface reflector for quantum cascade lasing is disclosed. The metasurface reflector uses an array of subcavities disposed on a substrate and spaced with a sub-wavelength period. Each of the subcavities includes a layer of quantum-cascade-laser-active material sandwiched between two metallic layers. The array of subcavities reflect an incident light of a resonant frequency with amplification. When used with an output coupler, a quantum cascade laser beam can be generated.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: August 8, 2017
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Benjamin Stanford Williams, Luyao Xu, Daguan Chen
  • QUANTUM CASCADE EXTERNAL CAVITY LASER WITH METASURFACES
    Publication number: 20170077667
    Abstract: A metasurface reflector for quantum cascade lasing is disclosed. The metasurface reflector uses an array of subcavities disposed on a substrate and spaced with a sub-wavelength period. Each of the subcavities includes a layer of quantum-cascade-laser-active material sandwiched between two metallic layers. The array of subcavities reflect an incident light of a resonant frequency with amplification. When used with an output coupler, a quantum cascade laser beam can be generated.
    Type: Application
    Filed: September 13, 2016
    Publication date: March 16, 2017
    Inventors: Benjamin Stanford Williams, Luyao Xu, Daguan Chen