Patents by Inventor Ghazaleh KAFAIE SHIRMANESH

Ghazaleh KAFAIE SHIRMANESH 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: 10802301
    Abstract: The optical response of a metasurface is controlled by actuating it via an electrical or magnetic field, temperature control, optical pumping or electromechanical actuation. The metasurface will therefore control the polarization of the incident light. The metasurface comprises an array of patch antennas. The patch antennas are in the form of asymmetrical elements, including rotated rods, cross-shapes, V-shapes, and L-shapes.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: October 13, 2020
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Pin Chieh Wu, Ruzan Sokhoyan, Ghazaleh Kafaie Shirmanesh, Harry A. Atwater
  • Publication number: 20200280174
    Abstract: A light modulation element according to example embodiments includes a substrate; a first lower DBR layer on the substrate including a first material layer alternately stacked with a second material layer having a different refractive index from the first material layer; a second lower DBR layer on the first lower DBR layer with a surface area less than the first lower DBR layer and including a third material layer alternately stacked with a fourth material layer having a different refractive index from the third material layer; an active layer on the second lower DBR layer, including a semiconductor material having a multi-quantum well structure and having a refractive index that varies according to an applied voltage; and an upper DBR layer on the active layer including a fifth material layer alternately stacked with a sixth material layer having a different refractive index from the fifth material layer.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 3, 2020
    Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Duhyun LEE, Muhammad ALAM, Ghazaleh KAFAIE SHIRMANESH, Harry ATWATER, Pin Chieh WU, Ragip PALA
  • Publication number: 20200227632
    Abstract: Electrically tunable metasurfaces including an array of subwavelength metasurface unit elements are presented. The unit elements include a stacked metal-insulator-metal structure within which an active phase change layer is included. A purely insulator, metal, or coexisting metal-insulator phase of the active layer can be electrically controlled to tune an amplitude and phase response of the metasurfaces. In combination with the subwavelengths dimensions of the unit elements, the phase and amplitude response can be controlled in a range from optical wavelengths to millimeter wavelength of incident light. Electrical control of the unit elements can be provided via resistive heating produced by flow of current though a top metal layer of the unit elements. Alternatively, electrical control of the unit elements can be provided via electrical field effect produced by applying a voltage differential between the top and bottom metal layers of the unit elements.
    Type: Application
    Filed: January 10, 2020
    Publication date: July 16, 2020
    Inventors: Yonghwi Kim, Pin Chieh Wu, Ruzan Sokhoyan, Kelly W. Mauser, Rebecca D. Glaudell, Ghazaleh Kafaie Shirmanesh, Harry A. Atwater
  • Patent number: 10509297
    Abstract: An array of unit cells allows beam steering of an incident electromagnetic wave. Each unit cell has a back reflector, a conductive oxide between gate dielectrics, and an antenna. Voltage bias applied to different layers enables the accumulation or depletion of charges at the top and bottom interfaces of the conductive oxide. The charge accumulation and depletion regions control the refractive index of the material, enabling control of the reflected electromagnetic wave.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: December 17, 2019
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Ghazaleh Kafaie Shirmanesh, Ruzan Sokhoyan, Harry A Atwater
  • Publication number: 20190131491
    Abstract: Provided are light emission devices including an output coupler and optical apparatuses having the same. The light emission device may include a QD layer containing quantum dots and a nano-antenna structure including an output coupler configured to control an output characteristic of light emitted from the QD layer. The output coupler may be configured to output an emission wavelength of the QD layer. The nano-antenna structure may include one of a metallic antenna, a dielectric antenna, and a slit-containing structure, or may have a multi-patch antenna structure or a fishbone antenna structure.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 2, 2019
    Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Duhyun LEE, Ruzan SOKHOYAN, Yu-Jung LU, Ghazaleh KAFAIE SHIRMANESH, Harry A. ATWATER, Ragip A. PALA, Chan-Wook BAIK
  • Publication number: 20190129206
    Abstract: An optical modulating device may include a plurality of quantum dot (QD)-containing layers having QDs and a plurality of refractive index change layers. The QD-containing layers may be disposed between the refractive index change layers, respectively. The optical modulating device may be configured to modulate light-emission characteristics of the plurality of QD-containing layers. At least two of the QD-containing layers may have different central emission wavelengths. At least two of the plurality of refractive index change layers may include different materials or have different carrier densities.
    Type: Application
    Filed: October 25, 2018
    Publication date: May 2, 2019
    Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Duhyun LEE, Ruzan SOKHOYAN, Yu-Jung LU, Ghazaleh KAFAIE SHIRMANESH, Harry ATWATER, Ragip PALA, Chanwook BAIK
  • Publication number: 20190107740
    Abstract: Provided is a quantum dot (QD) light modulator and an apparatus including the QD light modulator. The QD light modulator may include a QD-containing layer including QDs having light-emission characteristics, a refractive index change layer arranged adjacent to the QD-containing layer, and a reflector arranged facing the QD-containing layer. The refractive index change layer may include a carrier density change area in which a carrier density changes, and the carrier density change area may be arranged adjacent to the QD-containing layer. The light-emission characteristics of the QD-containing layer may be modulated according to a change in a property of the refractive index change layer. The QD light modulator may further include a nano-antenna structure arranged on the QD-containing layer.
    Type: Application
    Filed: October 10, 2018
    Publication date: April 11, 2019
    Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Duhyun LEE, Ruzan SOKHOYAN, Yu-Jung LU, Ghazaleh Kafaie SHIRMANESH, Harry ATWATER, Ragip PALA, Chanwook BAIK
  • Publication number: 20190079321
    Abstract: The optical response of a metasurface is controlled by actuating it via an electrical or magnetic field, temperature control, optical pumping or electromechanical actuation. The metasurface will therefore control the polarization of the incident light. The metasurface comprises an array of patch antennas. The patch antennas are in the form of asymmetrical elements, including rotated rods, cross-shapes, V-shapes, and L-shapes.
    Type: Application
    Filed: September 7, 2018
    Publication date: March 14, 2019
    Inventors: Pin Chieh WU, Ruzan SOKHOYAN, Ghazaleh KAFAIE SHIRMANESH, Harry A. ATWATER
  • Publication number: 20190033682
    Abstract: An array of unit cells allows beam steering of an incident electromagnetic wave. Each unit cell has a back reflector, a conductive oxide between gate dielectrics, and an antenna. Voltage bias applied to different layers enables the accumulation or depletion of charges at the top and bottom interfaces of the conductive oxide. The charge accumulation and depletion regions control the refractive index of the material, enabling control of the reflected electromagnetic wave.
    Type: Application
    Filed: January 26, 2018
    Publication date: January 31, 2019
    Inventors: Ghazaleh KAFAIE SHIRMANESH, Ruzan SOKHOYAN, Harry A ATWATER