Patents by Inventor Tongcang Li

Tongcang Li 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).

  • Sensors and methods of identifying a gas, and levitated spin-optomechanical systems
    Patent number: 10690604
    Abstract: Sensors and methods are provided that include a diamond material containing a nitrogen vacancy center, the diamond material being configured to be exposed to an environment comprising one or more gases, an optical light source configured to excite the nitrogen vacancy center of the diamond material with an optical light beam produced therefrom, a detector configured to detect a signal originating from the diamond material in response to the optical light beam exciting the nitrogen vacancy center, and the capability of analyzing the signal to identify a specific gas in the environment. Also included are levitated spin-optomechanical systems capable of elevating in a vacuum a diamond material containing a nitrogen vacancy center, applying microwave radiation to the diamond material for controlling and flipping the electron spin of the nitrogen vacancy center, and monitoring electron spin of the nitrogen vacancy center.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: June 23, 2020
    Assignee: Purdue Research Foundation
    Inventors: Tongcang Li, Thai Hoang, Jonghoon Ahn, Jaehoon Bang
  • SENSORS AND METHODS OF IDENTIFYING A GAS, AND LEVITATED SPIN-OPTOMECHANICAL SYSTEMS
    Publication number: 20180059039
    Abstract: Sensors and methods are provided that include a diamond material containing a nitrogen vacancy center, the diamond material being configured to be exposed to an environment comprising one or more gases, an optical light source configured to excite the nitrogen vacancy center of the diamond material with an optical light beam produced therefrom, a detector configured to detect a signal originating from the diamond material in response to the optical light beam exciting the nitrogen vacancy center, and the capability of analyzing the signal to identify a specific gas in the environment. Also included are levitated spin-optomechanical systems capable of elevating in a vacuum a diamond material containing a nitrogen vacancy center, applying microwave radiation to the diamond material for controlling and flipping the electron spin of the nitrogen vacancy center, and monitoring electron spin of the nitrogen vacancy center.
    Type: Application
    Filed: August 21, 2017
    Publication date: March 1, 2018
    Inventors: Tongcang Li, Thai Hoang, Jonghoon Ahn, Jaehoon Bang
  • Multiplane optical microscope
    Patent number: 9823457
    Abstract: This disclosure provides systems, methods, and apparatus related to optical microscopy. In one aspect, an apparatus includes a sample holder, a first objective lens, a plurality of optical components, a second objective lens, and a mirror. The apparatus may directly image a cross-section of a sample oblique to or parallel to the optical axis of the first objective lens, without scanning.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: November 21, 2017
    Assignee: The Regents of the University of California
    Inventors: Tongcang Li, Sadao Ota, Jeongmin Kim, Yuan Wang, Xiang Zhang
  • MULTIPLANE OPTICAL MICROSCOPE
    Publication number: 20150192767
    Abstract: This disclosure provides systems, methods, and apparatus related to optical microscopy. In one aspect, an apparatus includes a sample holder, a first objective lens, a plurality of optical components, a second objective lens, and a mirror. The apparatus may directly image a cross-section of a sample oblique to or parallel to the optical axis of the first objective lens, without scanning.
    Type: Application
    Filed: January 7, 2015
    Publication date: July 9, 2015
    Applicant: The Regents of the University of California
    Inventors: Tongcang Li, Sadao Ota, Jeongmin Kim, Yuan Wang, Xiang Zhang