Patents by Inventor Sang-Yen Cho

Sang-Yen Cho 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).

  • Metasurface-based active retroreflector
    Patent number: 12216376
    Abstract: An optoelectronic device apparatus using active, frequency-selective metasurfaces to achieve retroreflection at a pre-determined single frequency and optionally provide signal modulation on the reflected light beam. The apparatus may use several active, frequency-selective metasurfaces to replace traditional optical lens and mirrors.
    Type: Grant
    Filed: January 20, 2023
    Date of Patent: February 4, 2025
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Sang-Yen Cho, Weimin Zhou
  • METASURFACE-BASED ACTIVE RETROREFLECTOR
    Publication number: 20240248366
    Abstract: An optoelectronic device apparatus using active, frequency-selective metasurfaces to achieve retroreflection at a pre-determined single frequency and optionally provide signal modulation on the reflected light beam. The apparatus may use several active, frequency-selective metasurfaces to replace traditional optical lens and mirrors.
    Type: Application
    Filed: January 20, 2023
    Publication date: July 25, 2024
    Inventors: Sang-Yen Cho, Weimin Zhou