Patents by Inventor Simin Feng

Simin Feng 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: 10734732
    Abstract: An optically tunable metamaterial unit cell is provided for photonic switching. The cell is optically tunable and includes a dielectric substrate with upper and lower surfaces. The cell further includes arrays of metamaterial elements and a layer of photo-capacitive material. The arrays are disposed the upper surface of the dielectric substrate. The metamaterial is capable of reflecting electromagnetic radiation. The layer of photo-capacitive material overlaps the arrays of metamaterial elements. The photo-capacitive material is optically tunable.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: August 4, 2020
    Assignee: United States of America, as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Walter D. Sessions, Pearl Rayms-Keller, Robert B. Nichols, William F. Smith, Karen J. Long, Michael S. Lowry
  • Patent number: 10615506
    Abstract: A control device is provided for photonic switching. The device includes an optically tunable metamaterial unit cell. This structure includes a dielectric substrate; at least two arrays of metamaterial elements located on the top surface thereof, the metamaterial being capable of reflecting electromagnetic radiation, and a layer of photo-capacitive material overlapping the at least two arrays of metamaterial elements, the photo-capacitance of the photo-capacitive material being optically tunable; and a reflectarray or phased array system containing the unit cell.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: April 7, 2020
    Assignee: United States of America, as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Walter D. Sessions, Pearl Rayms-Keller, Robert B. Nichols, William F. Smith, Karen J. Long, Michael S. Lowry
  • Patent number: 10185911
    Abstract: A radio frequency identifier (RFID) tag is provided for receiving and reflecting electromagnetic energy at select frequency bands of visible and infrared wavelengths. The RFID tag includes an electrically conductive backplane; a dielectric substrate disposed on the backplane; a light guide film (LGF) disposed on the substrate, and metamaterial elements. The LGF has an exposed surface segregated into domains. The metamaterial devices are disposed on a domain. Each device is tuned to respond to a corresponding frequency among the select frequency bands.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: January 22, 2019
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Robert B. Nichols, Victor H. Gehman, Jr.
  • Publication number: 20180203189
    Abstract: A light transmission system is provided for operating an optically responsive circuit. The system includes a light guide film (LGF) to transmit light emitted from its edge, and a scattering node for directing the light to the circuit. The circuit is disposed on a proximate face of the LGF. The scattering node is disposed on a distal face of the LGF opposite the circuit. The circuit can be an integrated circuit, a light detection sensor or a photovoltaic cell.
    Type: Application
    Filed: August 18, 2016
    Publication date: July 19, 2018
    Applicant: United States of America, as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Michael H. Fugate, Simin Feng, Walter D. Sessions, Robert B. Nichols, Victor H. Gehman, JR.
  • Publication number: 20180166596
    Abstract: A photoconductive device is provided for changing dielectric properties in response to select electromagnetic radiation. The device includes an optical core, an optical filter disposed on the core, and an optically clear insulator disposed on the filter. One example core is a quantum dot. Another example core is an optically clear core overlaid by a photoconductive coating disposed thereon.
    Type: Application
    Filed: May 23, 2017
    Publication date: June 14, 2018
    Applicant: United States of America, as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Michael S. Lowry, Simin Feng, Robert B. Nichols, Mark E. Preddy
  • Patent number: 9864100
    Abstract: A metafilm coating having omni-directional bending of electromagnetic waves to the normal direction includes at least one medium having an effective relative permittivity of epsilon-near-zero, ?. The real component of the effective relative permittivity along the z-axis, (?z), perpendicular to the x-y plane, of the at medium, is about zero. At least one receptor is associated with the medium.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: January 9, 2018
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventor: Simin Feng
  • Patent number: 9524809
    Abstract: A dielectric composite material is provided for switch control by optical stimulus. The material includes a plurality of photo-conductive particulates; and a transparent binder for containing the plurality of particulates to form a photo-conductive pigment based matrix. The pigment based matrix is disposed on to overlap first and second separate electrodes to produce an electrical junction. Capacitance of the pigment based matrix changes from a first value absent the optical stimulus to a second value in response to illumination at a specific electromagnetic frequency and intensity by the optical stimulus.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: December 20, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kevin A. Boulais, Simin Feng, Pearl Rayms-Keller, Michael S. Lowry, Francesco Santiago
  • Patent number: 9515390
    Abstract: An electromagnetic reflector for reflecting an electromagnetic signal is provided based on meta-surface phase control using photo-capacitive materials, varactors or other tuning means. The shape of the metamaterial unit cell enhances the resonance and phase shift. The reflector includes first and second cells having respective first and second phase states, along with a switch for selecting between the first and second cells.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: December 6, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Simin Feng, Kevin A. Boulais, Frank L. Wallace, Blaise L. Corbett, Victor H. Gehman, Jr.
  • Patent number: 9500772
    Abstract: A metafilm is provided for operating on a photon at a defined wavelength, for super-scattering, absorption, and for laser absorber switch. The metafilm includes dimers and a conductive substrate for embedding the dimers in an array. Each dimer comprises a pair of a gain element and a loss element. The substrate, and the gain and loss elements have complex permittivity values. The metafilm super-scatters (e.g., lases) the photon in response to increasing the imaginary component of either the substrate or the loss element, and absorbs the photon in response to increasing the imaginary component of the gain element.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: November 22, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Simin Feng
  • Publication number: 20160172816
    Abstract: A metafilm is provided for operating on a photon at a defined wavelength, for super-scattering, absorption, and for laser absorber switch. The metafilm includes dimers and a conductive substrate for embedding the dimers in an array. Each dimer comprises a pair of a gain element and a loss element. The substrate, and the gain and loss elements have complex permittivity values. The metafilm super-scatters (e.g., lases) the photon in response to increasing the imaginary component of either the substrate or the loss element, and absorbs the photon in response to increasing the imaginary component of the gain element.
    Type: Application
    Filed: December 7, 2015
    Publication date: June 16, 2016
    Applicant: United States of America, as represented by the Secretary of the Navy
    Inventor: Simin Feng
  • Patent number: 9118027
    Abstract: Nanoplasmonic cavities for photovoltaic applications include at least one transparent conductive substrate. The nanoplasmonic cavities comprising a sandwich of layers incorporating a first plasmonic electrically conductive nanostructure layer, at least one photoabsorber layer and a at least one electron transfer layer and a second plasmonic electrically conductive nanostructure layer.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: August 25, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: M. Joseph Roberts, Simin Feng, Zachary A. Sechrist
  • Patent number: 9117950
    Abstract: Nanoplasmonic cavities for photovoltaic applications include at least one transparent conductive substrate. A first plasmonic electrically conductive nanostructure layer is associated with the transparent conductive substrate. At least one photoabsorber layer is associated with the first plasmonic electrically conductive nanostructure layer. At least one electron transfer layer is associated with the photoabsorber layer. A second plasmonic electrically conductive nanostructure layer is associated with the electron transfer layer. Multiple nanoplasmonic cavities can be electrically connected to provide greater photovoltaic efficiency.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: August 25, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: M. Joseph Roberts, Simin Feng, Zachary A. Sechrist
  • Patent number: 9087944
    Abstract: Nanoplasmonic cavities for photovoltaic applications include at least one transparent conductive substrate. A first plasmonic electrically conductive nanostructure layer is associated with the transparent conductive substrate. At least one photoabsorber layer is associated with the first plasmonic electrically conductive nanostructure layer. At least one electron transfer layer is associated with the photoabsorber layer. A second plasmonic electrically conductive nanostructure layer is associated with the electron transfer layer.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: July 21, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: M. Joseph Roberts, Simin Feng, Zachary A. Sechrist
  • Patent number: 9010408
    Abstract: Altering the direction of thermal radiation of any objects into any construction directions including grazing angles. Embodiments of the invention provide a new technique for thermal control and management.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: April 21, 2015
    Assignee: The Government of the United States of America as Represented by the Secretary of the Navy
    Inventor: Simin Feng
  • Patent number: 8995055
    Abstract: An angular and spectral selective absorber in ultrathin metamaterials is an absorber having an absorption wavelength, ?. Embodiments of the invention include at least one primary layer having a thickness, d, and a relative permittivity of epsilon-near-zero, ?. At least one reflective secondary layer is associated with the primary layer. The association is by bonding.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: March 31, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventor: Simin Feng
  • Patent number: 8927933
    Abstract: A dual-band wide-angle absorber/thermal emitter includes at least one primary layer having a permittivity described by the Drude-Lorentz model. At least one reflective secondary layer is associated with the primary layer.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: January 6, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventor: Simin Feng
  • Patent number: 8635039
    Abstract: A graphical technique and three phase unwrapping techniques for retrieving bulk permittivity and permeability tensors of materials, and more specifically, the new technique provides for retrieving isotropic and anisotropic material parameters.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: January 21, 2014
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventor: Simin Feng
  • Patent number: 8481153
    Abstract: An apparatus and method for imparting wide angle low reflection on any high reflective surfaces through resonant excitation of plasmonic leaky mode of a nanocavity.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: July 9, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Simin Feng, Mark B. Moran, M. Joseph Roberts, Linda F. Johnson