Patents by Inventor Pearl Rayms-Keller

Pearl Rayms-Keller 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).

  • Patent number: 10734732
    Abstract: An optically tunable metamaterial unit cell is provided for photonic switching. The cell is optically tunable and includes a dielectric substrate with upper and lower surfaces. The cell further includes arrays of metamaterial elements and a layer of photo-capacitive material. The arrays are disposed the upper surface of the dielectric substrate. The metamaterial is capable of reflecting electromagnetic radiation. The layer of photo-capacitive material overlaps the arrays of metamaterial elements. The photo-capacitive material is optically tunable.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: August 4, 2020
    Assignee: United States of America, as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Walter D. Sessions, Pearl Rayms-Keller, Robert B. Nichols, William F. Smith, Karen J. Long, Michael S. Lowry
  • Patent number: 10615506
    Abstract: A control device is provided for photonic switching. The device includes an optically tunable metamaterial unit cell. This structure includes a dielectric substrate; at least two arrays of metamaterial elements located on the top surface thereof, the metamaterial being capable of reflecting electromagnetic radiation, and a layer of photo-capacitive material overlapping the at least two arrays of metamaterial elements, the photo-capacitance of the photo-capacitive material being optically tunable; and a reflectarray or phased array system containing the unit cell.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: April 7, 2020
    Assignee: United States of America, as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Walter D. Sessions, Pearl Rayms-Keller, Robert B. Nichols, William F. Smith, Karen J. Long, Michael S. Lowry
  • Patent number: 9524809
    Abstract: A dielectric composite material is provided for switch control by optical stimulus. The material includes a plurality of photo-conductive particulates; and a transparent binder for containing the plurality of particulates to form a photo-conductive pigment based matrix. The pigment based matrix is disposed on to overlap first and second separate electrodes to produce an electrical junction. Capacitance of the pigment based matrix changes from a first value absent the optical stimulus to a second value in response to illumination at a specific electromagnetic frequency and intensity by the optical stimulus.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: December 20, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Simin Feng, Pearl Rayms-Keller, Michael S. Lowry, Francesco Santiago
  • Patent number: 9095043
    Abstract: A cloak is provided for concealing an object to an electromagnetic field. A first vane encloses the object and a second vane encloses the first vane. The distance between the first and second vanes varies relative to the object, so as to conceal the object to the electromagnetic field.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: July 28, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Walter D. Sessions, Francisco Santiago, Pearl Rayms-Keller, Lucas R. Hale, Craig Andrew Calcagno
  • Patent number: 8784704
    Abstract: A material is provided for switching dielectric constant between distinct first and second values responsive to electromagnetic radiation having a specified energy. The material includes a medium transparent to the radiation and a plurality of particulates. Each particulate has a dipole that assumes one of distinct first and second parameters that correspond to the first and second values. The particulates are suspended within the medium. The parameters are either dipole span or charge strength. The dipole of each particulate sets to the first parameter by default and sets to the second parameter in response to the radiation. The particulates can be composed from undoped semi-insulating gallium arsenide. The medium can be polymethylmethacrylate, for example.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: July 22, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Pearl Rayms-Keller, Michael S. Lowry, Francisco Santiago, Karen J. Long, Walter D. Sessions, Natasha Laguodas Wilkerson, Reniery Cevallos
  • Patent number: 8519382
    Abstract: A photocapacitor device is provided for responding to a photon having at least a specified energy. The photocapacitive device includes a first portion composed of a photocapacitive material; a second portion composed of a non-photocapacitive material; and a depletion region disposed between the first and second portions. The photocapacitive and non-photocapacitive materials respectively have first and second Fermi-energy differences, with the second Fermi-energy difference being higher than the first Fermi-energy difference.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: August 27, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Donald W. Rule, Karen J. Long, Francisco Santiago, Pearl Rayms-Keller, Victor H. Gehman, Jr.