Patents by Inventor Shanhui Fan

Shanhui Fan 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: 11408689
    Abstract: Various aspects as described herein are directed to a radiative cooling device and method for cooling an object. As consistent with one or more embodiments, a radiative cooling device includes a solar spectrum reflecting structure configured and arranged to suppress light modes, and a thermally-emissive structure configured and arranged to facilitate thermally-generated electromagnetic emissions from the object and in mid-infrared (IR) wavelengths.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: August 9, 2022
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Aaswath Pattabhi Raman, Shanhui Fan, Eden Rephaeli
  • Publication number: 20220237347
    Abstract: A method is disclosed for designing an analog computer that implements a trained recurrent neural network. A computer simulates a wave-based physical system including a wave propagation domain, a boundary layer that approximates a boundary condition, a source of waves, probes for measuring properties of propagated waves, a material within a central region of the wave propagation domain. The simulation also includes a discretized numerical model of a differential equation describing dynamics of wave propagation in the physical system.
    Type: Application
    Filed: April 19, 2020
    Publication date: July 28, 2022
    Inventors: Tyler William Hughes, Ian A.D. Williamson, Momchil Minkov, Shanhui Fan
  • Patent number: 11359841
    Abstract: A material may be included in a cooling film or cooling panel to achieve cooling even under direct solar irradiation. The material includes one or more constituent materials and an outer surface configured to interact thermally with the atmosphere and with solar radiation. The material exhibits an emissivity of at least 0.8 in spectral range of 5 ?m to 15 ?m, an ultraviolet reflectivity of at least 0.5 in the spectral range of 275 nm to 375 nm, an ultraviolet absorptivity of at least 0.75 in the spectral range of 275 nm to 375 nm, or a combination thereof. A cooling film, or cooling panel, may be affixed to an exterior surface of a vehicle, structure, or system to provide cooling even under direct solar irradiance.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: June 14, 2022
    Assignee: SkyCool Systems, Inc.
    Inventors: Aaswath Raman, Eli A. Goldstein, Shanhui Fan
  • Publication number: 20220182070
    Abstract: In certain examples, methods and semiconductor structures are directed to an apparatus including a photon emitter such as an LED which operates over an emission wavelength range and a photo-voltaic device arranged relative to the photon emitter to provide index-matched optical coupling between the photo-voltaic device and the photon emitter for an emission wavelength range of the photon emitter.
    Type: Application
    Filed: December 3, 2021
    Publication date: June 9, 2022
    Inventors: Shanhui Fan, Bo Zhao, Sid Assawaworrarit, Parthiban Santhanam, Meir Orenstein
  • Publication number: 20220178628
    Abstract: Various aspects as described herein are directed to a radiative cooling apparatuses and methods for cooling an object. As consistent with one or more embodiments, a radiative cooling apparatus includes an arrangement of a plurality of different material located at different depths along a depth dimension relative to the object. The plurality of different material includes a solar spectrum reflecting portion configured and arranged to suppress light modes, thereby inhibiting coupling of the incoming electromagnetic radiation, of at least some wavelengths in the solar spectrum, to the object at a range of angles of incidence relative to the depth dimension. Further, the plurality of material includes a thermally-emissive arrangement configured and arranged to facilitate, simultaneously with the inhibiting coupling of the incoming electromagnetic radiation, the thermally-generated electromagnetic emissions from the object at the range of angles of incidence and in mid-IR wavelengths.
    Type: Application
    Filed: December 16, 2021
    Publication date: June 9, 2022
    Inventors: Aaswath Pattabhi Raman, Shanhui Fan, Eden Rephaeli, Linxiao Zhu, Marc A. Anoma, Eli Goldstein
  • Patent number: 11215407
    Abstract: Various aspects as described herein are directed to a radiative cooling apparatuses and methods for cooling an object. As consistent with one or more embodiments, a radiative cooling apparatus includes an arrangement of a plurality of different material located at different depths along a depth dimension relative to the object. The plurality of different material includes a solar spectrum reflecting portion configured and arranged to suppress light modes, thereby inhibiting coupling of the incoming electromagnetic radiation, of at least some wavelengths in the solar spectrum, to the object at a range of angles of incidence relative to the depth dimension. Further, the plurality of material includes a thermally-emissive arrangement configured and arranged to facilitate, simultaneously with the inhibiting coupling of the incoming electromagnetic radiation, the thermally-generated electromagnetic emissions from the object at the range of angles of incidence and in mid-IR wavelengths.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: January 4, 2022
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Aaswath Pattabhi Raman, Shanhui Fan, Eden Rephaeli, Linxiao Zhu, Marc A. Anoma, Eli Goldstein
  • Publication number: 20210408318
    Abstract: Shockley-Read-Hall (SRH) generation and/or recombination in heterojunction devices is suppressed by unconventional doping at or near the heterointerface. The effect of this doping is to shift SRH generation and/or recombination preferentially into the wider band gap material of the heterojunction. This reduces total SRH generation and/or recombination in the device by decreasing the intrinsic carrier concentration ni at locations where most of the SRH generation and/or recombination occurs. The physical basis for this effect is that the SRH generation and/or recombination rate tends to decrease as ni around the depletion region decreases, so decreasing the effective ni in this manner is a way to decrease SRH recombination.
    Type: Application
    Filed: June 25, 2021
    Publication date: December 30, 2021
    Inventors: Parthiban Santhanam, Shanhui Fan
  • Publication number: 20210402734
    Abstract: Example implementations include a textile apparatus for transporting perspiration and heat, the textile apparatus including a substantially planar and heat-conducting substrate including at least one recess, and a textile film including one or more fibers disposed in contact with at least one substantially planar surface of the substrate and at least one surface of the recess. Example implementations also include a method of manufacturing a textile apparatus for transporting perspiration and heat, the method including forming a nanofiber solution, extruding one or more nanofibers from the nanofiber solution, forming one or more recesses in a substantially planar surface of a substrate, and integrating one or more of the nanofibers with the substantially planar surface of the substrate and at least one surface of the recesses.
    Type: Application
    Filed: June 24, 2021
    Publication date: December 30, 2021
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Yi Cui, Shanhui Fan, Yucan Peng, Wei Li, Bofei Liu
  • Publication number: 20210278566
    Abstract: An isotropic imaging filter is provided that includes a photonic crystal slab, where the photonic crystal slab includes a square lattice of air through holes, a dielectric constant, a thickness (d), a through hole radius (r), and a lattice constant (a), where the square lattice of air holes are separated according to a value of the lattice constant, where the thickness is configured according to d=M(a), where the through hole radii is configured according to r=N(a), where the thickness and the hole radii are configured to generate isotropic bands of guided resonances of an incident image.
    Type: Application
    Filed: February 22, 2021
    Publication date: September 9, 2021
    Inventors: Cheng Guo, Meng Xiao, Momchil Minkov, Yu Shi, Shanhui Fan
  • Publication number: 20210254908
    Abstract: Various aspects as described herein are directed to a radiative cooling device and method for cooling an object. As consistent with one or more embodiments, a radiative cooling device includes a solar spectrum reflecting structure configured and arranged to suppress light modes, and a thermally-emissive structure configured and arranged to facilitate thermally-generated electromagnetic emissions from the object and in mid-infrared (IR) wavelengths.
    Type: Application
    Filed: March 8, 2021
    Publication date: August 19, 2021
    Inventors: Aaswath Pattabhi Raman, Shanhui Fan, Eden Rephaeli
  • Patent number: 11067836
    Abstract: A multi-stack graphene structure includes a graphene stack that includes graphene layers including amorphous graphene and thin film dielectric layers. The graphene layers include amorphous graphene. The graphene layers and the thin dielectric layers are alternately stacked on one another. The multi-stack graphene structure also includes an electric field former configured to apply an electric field to the graphene layers.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: July 20, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., THE BOARD OF TRUSTEES OF THE LELAND STANFORD JR. UNIVERSITY
    Inventors: Wonjae Joo, Juhyung Kang, Soojin Kim, Mark L. Brongersma, Shanhui Fan
  • Publication number: 20210192342
    Abstract: Systems and methods for training photonic neural networks in accordance with embodiments of the invention are illustrated. One embodiment includes a method for training a set of one or more optical interference units (OIUs) of a photonic artificial neural network (ANN), wherein the method includes calculating a loss for an original input to the photonic ANN, computing an adjoint input based on the calculated loss, measuring intensities for a set of one or more phase shifters in the set of OIUs when the computed adjoint input and the original input are interfered with each other within the set of OIUs, computing a gradient from the measured intensities, and tuning phase shifters of the OIU based on the computed gradient.
    Type: Application
    Filed: May 10, 2019
    Publication date: June 24, 2021
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Tyler William Hughes, Momchil Minkov, Ian Williamson, Shanhui Fan
  • Publication number: 20210116781
    Abstract: Systems and methods for activation in an optical circuit in accordance with embodiments of the invention are illustrated. One embodiment includes an optical activation circuit, wherein the circuit comprises a directional coupler, an optical-to-electrical conversion circuit, a time delay element, a nonlinear signal conditioner, and a phase shifter. The directional coupler receives an optical input and provides a first portion to the optical-to-electrical conversion circuit and a second portion to the time delay element, the time delay element provides a delayed signal to the phase shifter, and the optical-to-electrical conversion circuit converts an optical signal from the directional coupler to an electrical signal used to activate the phase shifter to shift the phase of the delayed signal.
    Type: Application
    Filed: May 10, 2019
    Publication date: April 22, 2021
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Tyler William Hughes, Momchil Minkov, Ian Williamson, Shanhui Fan
  • Patent number: 10941990
    Abstract: Various aspects as described herein are directed to a radiative cooling device and method for cooling an object. As consistent with one or more embodiments, a radiative cooling device includes a solar spectrum reflecting structure configured and arranged to suppress light modes, and a thermally-emissive structure configured and arranged to facilitate thermally-generated electromagnetic emissions from the object and in mid-infrared (IR) wavelengths.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: March 9, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Aaswath Pattabhi Raman, Shanhui Fan, Eden Rephaeli
  • Patent number: 10928551
    Abstract: An isotropic imaging filter is provided that includes a photonic crystal slab, where the photonic crystal slab includes a square lattice of air through holes, a dielectric constant, a thickness (d), a through hole radius (r), and a lattice constant (a), where the square lattice of air holes are separated according to a value of the lattice constant, where the thickness is configured according to d=M(a), where the through hole radii is configured according to r=N(a), where the thickness and the hole radii are configured to generate isotropic bands of guided resonances of an incident image.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: February 23, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Cheng Guo, Meng Xiao, Momchil Minkov, Yu Shi, Shanhui Fan
  • Patent number: 10931146
    Abstract: Various embodiments are directed to apparatuses and methods related to source circuitry that provide power to other circuitry. The source circuitry including gain circuitry and a source resonator. The gain circuitry provide powers to the source resonator with a gain that is dependent on a coupling rate between the source circuitry and other circuitry. The source resonator is coupled to the gain circuitry and generates a magnetic field in response to the power. The source circuitry is configured and arranged to wirelessly transfer the power to the other circuitry via the magnetic field.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: February 23, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Shanhui Fan, Sid Assawaworrarit, Xiaofang Yu
  • Publication number: 20210024143
    Abstract: An apparatus includes a substrate, at least one type of tuning material, and a composite material. The substrate has an interface surface or material that manifests, in response to light in a color spectrum, a particular color and a first thermal load. The particular color is associated with the first thermal load. The at least one type of tuning material manifests, in response to light in the color spectrum, the particular color and a second thermal load. The particular color is associated with the second thermal load. The first thermal load is different from the second thermal load. The composite material includes the interface surface or material and the at least one type of tuning material. The composite material manifests, in response to light in the color spectrum, the particular color and a tuned thermal load which is different than the first thermal load and the second thermal load.
    Type: Application
    Filed: March 29, 2019
    Publication date: January 28, 2021
    Inventors: Wei Li, Yu Shi, Shanhui Fan, Zhen Chen
  • Patent number: 10816828
    Abstract: A multi-stack graphene structure includes a graphene stack that includes graphene layers including amorphous graphene and thin film dielectric layers. The graphene layers include amorphous graphene. The graphene layers and the thin dielectric layers are alternately stacked on one another. The multi-stack graphene structure also includes an electric field former configured to apply an electric field to the graphene layers.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: October 27, 2020
    Assignees: SAMSUNG ELECTRONICS CO., LTD., THE BOARD OF TRUSTEES OF THE LELAND STANFORD JR. UNIVERSITY
    Inventors: Wonjae Joo, Juhyung Kang, Soojin Kim, Mark L. Brongersma, Shanhui Fan
  • Publication number: 20200333047
    Abstract: A material may be included in a cooling film or cooling panel to achieve cooling even under direct solar irradiation. The material includes one or more constituent materials and an outer surface configured to interact thermally with the atmosphere and with solar radiation. The material exhibits an emissivity of at least 0.8 in spectral range of 5 ?m to 15 um, an ultraviolet reflectivity of at least 0.5 in the spectral range of 275 nm to 375 nm, an ultraviolet absorptivity of at least 0.75 in the spectral range of 275 nm to 375 nm, or a combination thereof. A cooling film, or cooling panel, may be affixed to an exterior surface of a vehicle, structure, or system to provide cooling even under direct solar irradiance.
    Type: Application
    Filed: April 17, 2020
    Publication date: October 22, 2020
    Inventors: Aaswath Raman, Eli A. Goldstein, Shanhui Fan
  • Patent number: 10544999
    Abstract: In one embodiment of the present disclosure, a device is disclosed comprising a macroscopic thermal body and an extraction structure that is electromagnetically-coupled to the thermal emitting area of the thermal body. The macroscopic thermal body having a thermal emitting area, and the extraction structure configured and arranged to facilitate emission from, or receipt to the thermal emitting area that exceeds a theoretical, Stefan-Boltzmann, emission limit for a blackbody having the same thermal emitting area as the thermal body.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 28, 2020
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Zongfu Yu, Nicholas Sergeant, Torbjorn Skauli, Gang Zhang, Hailiang Wang, Shanhui Fan