Patents by Inventor MARK C. WEIDMAN

MARK C. WEIDMAN 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: 11851582
    Abstract: Subwavelength conducting particles can be arranged on conducting surfaces to provide arbitrary thermal emissivity spectra. For example, a thermal emissivity spectrum can be tailored to suppress a thermal signature of an object without sacrificing radiative cooling efficiency.
    Type: Grant
    Filed: December 24, 2021
    Date of Patent: December 26, 2023
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik Edward Josberger, Mark C. Weidman
  • Publication number: 20230367171
    Abstract: According to various embodiments, a tunable optical device comprises a tunable optical metasurface on a substrate with an integrated driver circuit. In some embodiments, the tunable optical device includes a photon shield layer to prevent optical radiation from disrupting operation of the driver circuit. In some embodiments, the tunable optical device includes a diagnostic circuit to detect and disable defective optical structures of the metasurface. In some embodiments, the tunable optical device includes an integrated heater circuit that maintains a liquid crystal of the metasurface above a minimum operating temperature. In some embodiments, the tunable optical device includes an integrated lidar sequencing controller, a steering pattern subcircuit, and a photodetector circuit.
    Type: Application
    Filed: October 31, 2022
    Publication date: November 16, 2023
    Inventors: Gleb M. Akselrod, Mark C. Weidman, Erik Edward Josberger, Tyler Williamson, Yizhak Sabba
  • Patent number: 11493823
    Abstract: According to various embodiments, a tunable optical device comprises a tunable optical metasurface on a substrate with an integrated driver circuit. In some embodiments, the tunable optical device includes a photon shield layer to prevent optical radiation from disrupting operation of the driver circuit. In some embodiments, the tunable optical device includes a diagnostic circuit to detect and disable defective optical structures of the metasurface. In some embodiments, the tunable optical device includes an integrated heater circuit that maintains a liquid crystal of the metasurface above a minimum operating temperature. In some embodiments, the tunable optical device includes an integrated lidar sequencing controller, a steering pattern subcircuit, and a photodetector circuit.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: November 8, 2022
    Assignee: Lumotive, LLC
    Inventors: Gleb M. Akselrod, Mark C. Weidman, Erik Edward Josberger, Tyler Williamson, Yizhak Sabba
  • Patent number: 11487184
    Abstract: According to various embodiments, a tunable optical device comprises a tunable optical metasurface on a substrate with an integrated driver circuit. In some embodiments, the tunable optical device includes a photon shield layer to prevent optical radiation from disrupting operation of the driver circuit. In some embodiments, the tunable optical device includes a diagnostic circuit to detect and disable defective optical structures of the metasurface. In some embodiments, the tunable optical device includes an integrated heater circuit that maintains a liquid crystal of the metasurface above a minimum operating temperature. In some embodiments, the tunable optical device includes an integrated lidar sequencing controller, a steering pattern subcircuit, and a photodetector circuit.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: November 1, 2022
    Assignee: Lumotive, LLC
    Inventors: Gleb M. Akselrod, Mark C. Weidman, Erik Edward Josberger, Tyler Williamson, Yizhak Sabba
  • Patent number: 11487183
    Abstract: According to various embodiments, a cover is sealed over a metasurface on a substrate to create a sealed chamber. Liquid crystal, or another tunable refractive index dielectric material, is positioned within the sealed chamber around optical structures of the metasurface before or after the cover is sealed. For example, the liquid crystal may be injected through small vias or holes to fill a sealed chamber. In some embodiments, a glass cover is shaped or patterned with photoresist to protrude into the sealed chamber to reduce the thickness of the liquid crystal used to fill the sealed chamber. A driver to control the metasurface may be, for example, integrated within the substrate, be attached to exposed bond pads of the metasurface, and/or be embodied as a control layer connected to the metasurface through the substrate by through-substrate vias (TSVs).
    Type: Grant
    Filed: March 17, 2022
    Date of Patent: November 1, 2022
    Assignee: Lumotive, LLC
    Inventors: Gleb M. Akselrod, Erik Edward Josberger, Mark C. Weidman, Prasad Padmanabha Iyer
  • Patent number: 11429008
    Abstract: According to various embodiments, a tunable optical metasurface includes an array of elongated resonator rails arranged parallel to one another. Liquid crystal is positioned within an optical field region between adjacent resonator rails. A controller can selectively apply a voltage differential pattern to the elongated resonator rails to adjust a phase response thereof. According to various embodiments, a cross-backplane reflector is utilized that allows for mid-array routing or edge-array routing of electrical connections between the controller and the resonator rails. The cross-backplane reflector comprises a plurality of elongated optical reflectors extending parallel to one another and perpendicular to the array of resonator rails. An optically transmissive (e.g., transparent) dielectric may electrically separate the resonator rails from the optical reflectors. A pattern of vias formed therein facilitates electrical connections between the optical reflectors and the resonator rails.
    Type: Grant
    Filed: March 3, 2022
    Date of Patent: August 30, 2022
    Assignee: Lumotive, LLC
    Inventors: Gleb M. Akselrod, Erik Edward Josberger, Mark C. Weidman, Prasad Padmanabha Iyer
  • Publication number: 20220186044
    Abstract: Subwavelength conducting particles can be arranged on conducting surfaces to provide arbitrary thermal emissivity spectra. For example, a thermal emissivity spectrum can be tailored to suppress a thermal signature of an object without sacrificing radiative cooling efficiency.
    Type: Application
    Filed: December 24, 2021
    Publication date: June 16, 2022
    Inventors: GLEB M. AKSELROD, ERIK EDWARD JOSBERGER, MARK C. WEIDMAN
  • Patent number: 11208568
    Abstract: Subwavelength conducting particles can be arranged on conducting surfaces to provide arbitrary thermal emissivity spectra. For example, a thermal emissivity spectrum can be tailored to suppress a thermal signature of an object without sacrificing radiative cooling efficiency.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: December 28, 2021
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik Edward Josberger, Mark C. Weidman
  • Patent number: 10968522
    Abstract: The disclosure provides a method for fabricating a metallic optical metasurface having an array of hologram elements. The method includes forming a first copper layer protected with a conducting or dielectric barrier layer over a backplane structure by a damascene process. The first copper layer comprises a plurality of nano-gaps vertically extending from the backplane structure. The plurality of nano-gaps is filled with a dielectric material. The method also includes removing the dielectric material and a portion of the conducting or dielectric barrier layer to expose the portions in the nano-gaps of the first copper layer. The method may further include depositing a dielectric coating layer over the top portion and exposed side portions of the first copper layer to form a protected first copper layer, and filling the gaps with an electrically-tunable dielectric material that has an electrically-tunable refractive index.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: April 6, 2021
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik Edward Josberger, Mark C. Weidman
  • Patent number: 10886317
    Abstract: The method is provided for fabricating an optical metasurface. The method may include depositing a conductive layer over a holographic region of a wafer and depositing a dielectric layer over the conducting layer. The method may also include patterning a hard mask on the dielectric layer. The method may further include etching the dielectric layer to form a plurality of dielectric pillars with a plurality of nano-scale gaps between the pillars.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: January 5, 2021
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Patent number: 10790324
    Abstract: A 2D hologram system with a matrix addressing scheme is provided. The system may include a 2D array of sub-wavelength hologram elements integrated with a refractive index tunable core material on a wafer substrate. The system may also include a matrix addressing scheme coupled to the 2D array of sub-wavelength hologram elements and configured to independently control each of the sub-wavelength hologram elements by applying a voltage.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: September 29, 2020
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Publication number: 20200303443
    Abstract: The method is provided for fabricating an optical metasurface. The method may include depositing a conductive layer over a holographic region of a wafer and depositing a dielectric layer over the conducting layer. The method may also include patterning a hard mask on the dielectric layer. The method may further include etching the dielectric layer to form a plurality of dielectric pillars with a plurality of nano-scale gaps between the pillars.
    Type: Application
    Filed: April 6, 2020
    Publication date: September 24, 2020
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Patent number: 10763290
    Abstract: Embodiments include a LIDAR scanning system. A laser is configured to emit pulses of light. A transmit reconfigurable-metasurface is configured to reflect an incident pulse of light as an illumination beam pointing at a field of view. This pointing is responsive to a first holographic beam steering pattern implemented in the transmit reconfigurable-metasurface. A receive reconfigurable-metasurface is configured to reflect a return of the illumination beam to an optical detector. This pointing is responsive to a second holographic beam steering pattern implemented in the receiving reconfigurable-metasurface. An optical detector includes an array of detector pixels. Each detector pixel includes (i) a photodetector configured to detect light in the return of the illumination beam and (ii) a timing circuit configured to determine a time of flight of the detected light. The optical detector is also configured to output a detection signal indicative of the detected light and the time of flight.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: September 1, 2020
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Publication number: 20200203413
    Abstract: A 2D hologram system with a matrix addressing scheme is provided. The system may include a 2D array of sub-wavelength hologram elements integrated with a refractive index tunable core material on a wafer substrate. The system may also include a matrix addressing scheme coupled to the 2D array of sub-wavelength hologram elements and configured to independently control each of the sub-wavelength hologram elements by applying a voltage.
    Type: Application
    Filed: November 5, 2019
    Publication date: June 25, 2020
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Patent number: 10622393
    Abstract: The method is provided for fabricating an optical metasurface. The method may include depositing a conductive layer over a holographic region of a wafer and depositing a dielectric layer over the conducting layer. The method may also include patterning a hard mask on the dielectric layer. The method may further include etching the dielectric layer to form a plurality of dielectric pillars with a plurality of nano-scale gaps between the pillars.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: April 14, 2020
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Patent number: 10468447
    Abstract: A 2D hologram system with a matrix addressing scheme is provided. The system may include a 2D array of sub-wavelength hologram elements integrated with a refractive index tunable core material on a wafer substrate. The system may also include a matrix addressing scheme coupled to the 2D array of sub-wavelength hologram elements and configured to independently control each of the sub-wavelength hologram elements by applying a voltage.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: November 5, 2019
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Publication number: 20190301025
    Abstract: The disclosure provides a method for fabricating a metallic optical metasurface having an array of hologram elements. The method includes forming a first copper layer protected with a conducting or dielectric barrier layer over a backplane structure by a damascene process. The first copper layer comprises a plurality of nano-gaps vertically extending from the backplane structure. The plurality of nano-gaps is filled with a dielectric material. The method also includes removing the dielectric material and a portion of the conducting or dielectric barrier layer to expose the portions in the nano-gaps of the first copper layer. The method may further include depositing a dielectric coating layer over the top portion and exposed side portions of the first copper layer to form a protected first copper layer, and filling the gaps with an electrically-tunable dielectric material that has an electrically-tunable refractive index.
    Type: Application
    Filed: April 2, 2018
    Publication date: October 3, 2019
    Inventors: Gleb M. Akselrod, Erik Edward Josberger, Mark C. Weidman
  • Publication number: 20190252441
    Abstract: The method is provided for fabricating an optical metasurface. The method may include depositing a conductive layer over a holographic region of a wafer and depositing a dielectric layer over the conducting layer. The method may also include patterning a hard mask on the dielectric layer. The method may further include etching the dielectric layer to form a plurality of dielectric pillars with a plurality of nano-scale gaps between the pillars.
    Type: Application
    Filed: February 4, 2019
    Publication date: August 15, 2019
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Patent number: 10332923
    Abstract: A hologram system may include a hologram chip comprising a wafer substrate having a first plurality of conductive pads on a hologram surface region connected to a second plurality of conductive pads on an interconnect surface region. The hologram chip may also include an array of sub-wavelength hologram elements integrated with a refractive index tunable core material on the hologram region of the wafer substrate. The hologram system may also include a control circuit chip having a third plurality of conductive pads connected to the second plurality of conductive pads on the interconnect region of the wafer substrate. The interconnect region is on the same side of the wafer substrate as the hologram region. The first plurality of conductive pads is directly connected to the array of sub-wavelength hologram elements.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: June 25, 2019
    Assignee: Elwha LLC
    Inventors: Erik E. Josberger, Gleb M. Akselrod, Mark C. Weidman
  • Patent number: 10199415
    Abstract: The method is provided for fabricating an optical metasurface. The method may include depositing a conductive layer over a holographic region of a wafer and depositing a dielectric layer over the conducting layer. The method may also include patterning a hard mask on the dielectric layer. The method may further include etching the dielectric layer to form a plurality of dielectric pillars with a plurality of nano-scale gaps between the pillars.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: February 5, 2019
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman