Patents by Inventor Michael Benjamin JOHNSTON

Michael Benjamin JOHNSTON 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).

  • Terahertz electromagnetic radiation detector
    Patent number: 12385787
    Abstract: A detector for detecting terahertz electromagnetic radiation comprises a substrate and a pair of electrically isolated detector elements supported thereon. Each detector element comprises a pair of antenna elements having a gap therebetween and a switch element comprising one or more pieces of photoconductive semiconductor material connected between the antenna elements across the gap. The pairs of antenna elements of the respective detector elements are configured so that, when the switch element is conductive, current is generated between the antenna elements by polarisation components of incident terahertz electromagnetic radiation having polarisation directions in respective sensing directions that are perpendicular, thereby providing simultaneous detection of perpendicular polarisation components of incident terahertz electromagnetic radiation.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: August 12, 2025
    Assignee: OXFORD UNIVERSITY INNOVATION LIMITED
    Inventors: Michael Benjamin Johnston, Kun Peng
  • TERAHERTZ ELECTROMAGNETIC RADIATION DETECTOR
    Publication number: 20230070738
    Abstract: A detector for detecting terahertz electromagnetic radiation comprises a substrate and a pair of electrically isolated detector elements supported thereon. Each detector element comprises a pair of antenna elements having a gap therebetween and a switch element comprising one or more pieces of photoconductive semiconductor material connected between the antenna elements across the gap. The pairs of antenna elements of the respective detector elements are configured so that, when the switch element is conductive, current is generated between the antenna elements by polarisation components of incident terahertz electromagnetic radiation having polarisation directions in respective sensing directions that are perpendicular, thereby providing simultaneous detection of perpendicular polarisation components of incident terahertz electromagnetic radiation.
    Type: Application
    Filed: February 25, 2021
    Publication date: March 9, 2023
    Inventors: Michael Benjamin JOHNSTON, Kun PENG