Patents by Inventor Joel Q. Grim

Joel Q. Grim 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: 11150495
    Abstract: A technique is described to deterministically tune the emission frequency of individual semiconductor photon sources, for example quantum dots. A focused laser is directed at a film of material that changes form when heated (for example, a phase change material that undergoes change between crystal and amorphous forms) overlaid on a photonic membrane that includes the photon sources. The laser causes a localized change in form in the film, resulting in a change in emission frequency of a photon source.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: October 19, 2021
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Joel Q. Grim, Allan S. Bracker, Samuel Carter, Daniel Gammon
  • Patent number: 10921519
    Abstract: Emission frequency of quantum dots in a photonic crystal membrane can be tuned by laser light treatment. For example, a focused laser can heat InAs quantum dots embedded within a <200 nm photonic crystal GaAs membrane. At temperatures above about 600° C., indium atoms from the quantum dots and gallium atoms from the membrane interdiffuse, alloying the quantum dots with the surrounding membrane. This causes the quantum dots to become more gallium rich, which shifts the emission to higher frequencies.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: February 16, 2021
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Joel Q. Grim, Samuel Carter, Allan S. Bracker, Daniel Gammon
  • Publication number: 20190369420
    Abstract: A technique is described to deterministically tune the emission frequency of individual semiconductor photon sources, for example quantum dots. A focused laser is directed at a film of material that changes form when heated (for example, a phase change material that undergoes change between crystal and amorphous forms) overlaid on a photonic membrane that includes the photon sources. The laser causes a localized change in form in the film, resulting in a change in emission frequency of a photon source.
    Type: Application
    Filed: May 24, 2019
    Publication date: December 5, 2019
    Inventors: Joel Q. Grim, Allan S. Bracker, Samuel Carter, Daniel Gammon
  • Publication number: 20190079245
    Abstract: Emission frequency of quantum dots in a photonic crystal membrane can be tuned by laser light treatment. For example, a focused laser can heat InAs quantum dots embedded within a <200 nm photonic crystal GaAs membrane. At temperatures above about 600° C., indium atoms from the quantum dots and gallium atoms from the membrane interdiffuse, alloying the quantum dots with the surrounding membrane. This causes the quantum dots to become more gallium rich, which shifts the emission to higher frequencies.
    Type: Application
    Filed: September 11, 2018
    Publication date: March 14, 2019
    Inventors: Joel Q. Grim, Samuel Carter, Allan S. Bracker, Daniel Gammon