Patents by Inventor Harry A. Atwater

Harry A. Atwater 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: 10775648
    Abstract: Systems and methods in accordance with embodiments of the invention implement electrically tunable metasurfaces.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 15, 2020
    Assignee: California Institute of Technology
    Inventor: Harry A. Atwater
  • Publication number: 20200284904
    Abstract: Provided are an optical modulating device and a system including the optical modulating device. The optical modulating device includes a substrate, and a phase modulator formed on the substrate and including a Fabry-Perot cavity. The Fabry-Perot cavity of the phase modulator includes a first reflective layer, a second reflective layer, and a tunable core formed between the first reflective layer and the second reflective layer, wherein the tunable core is formed of a semiconductor material and is configured to modulate a phase of light corresponding to modulation of a refractive index of the tunable core according to electrical control.
    Type: Application
    Filed: May 27, 2020
    Publication date: September 10, 2020
    Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Duhyun LEE, Muhammad ALAM, Harry ATWATER, Ragip PALA, Byunghoon NA, Seunghoon HAN
  • 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: 10696428
    Abstract: A space-based solar power station, a power generating satellite module and/or a method for collecting solar radiation and transmitting power generated using electrical current produced therefrom, and/or compactible structures and deployment mechanisms used to form and deploy such satellite modules and power generation tiles associated therewith are provided. Each satellite module and/or power generation tile may be formed of a compactable structure and deployment mechanism capable of reducing the payload area required to deliver the satellite module to an orbital formation within the space-based solar power station and reliably deploy it once in orbit.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: June 30, 2020
    Assignee: California Institute of Technology
    Inventors: Sergio Pellegrino, Harry A. Atwater, Seyed Ali Hajimiri, Manan Arya, Christophe Leclerc, Nicolas Lee
  • Patent number: 10700234
    Abstract: In conventional solar cells with metal contacts, a non-negligible fraction of the incoming solar power is immediately lost either through absorption or reflection upon interaction with the contacts. Effectively transparent contacts (“ETCs”) for solar cells can be referred to as three-dimensional contacts designed to redirect incoming light onto a photoabsorbing surface of a solar cell. In many embodiments, the ETCs have triangular cross-sections. Such ETCs can be placed on a photoabsorbing surface such that at least one of their sides forms an angle with the photoabsorbing surface. In this configuration, the ETCs can redirect incident light onto the photoabsorbing surface, mitigating or eliminating reflection loss compared to conventional solar cells. When constructed in accordance with a number of embodiments of the invention, ETCs can be effectively transparent and highly conductive.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: June 30, 2020
    Assignee: California Institute of Technology
    Inventors: Rebecca Saive, Harry A. Atwater, Sisir Yalamanchili, Colton Bukowsky, Thomas Russell
  • Publication number: 20200201083
    Abstract: Resonant optical cavities incorporating black phosphorus to enable electrically tunable control of light are disclosed. Methods and devices are described that use black phosphorus as an electrically tunable optical material to control phase, amplitude and/or polarization of light from visible to mid-infrared wavelengths. The operating wavelength of the optical cavities depends on the thickness of the embedded black phosphorous. Tunable control of light is performed by adjusting the doping level of black phosphorous.
    Type: Application
    Filed: December 20, 2019
    Publication date: June 25, 2020
    Inventors: William S. WHITNEY, Michelle C. SHERROTT, Harry A. ATWATER
  • Publication number: 20200152821
    Abstract: In conventional solar cells with metal contacts, a non-negligible fraction of the incoming solar power is immediately lost either through absorption or reflection upon interaction with the contacts. Effectively transparent contacts (“ETCs”) for solar cells can be referred to as three-dimensional contacts designed to redirect incoming light onto a photoabsorbing surface of a solar cell. In many embodiments, the ETCs have triangular cross-sections. Such ETCs can be placed on a photoabsorbing surface such that at least one of their sides forms an angle with the photoabsorbing surface. In this configuration, the ETCs can redirect incident light onto the photoabsorbing surface, mitigating or eliminating reflection loss compared to conventional solar cells. When constructed in accordance with a number of embodiments of the invention, ETCs can be effectively transparent and highly conductive.
    Type: Application
    Filed: January 16, 2020
    Publication date: May 14, 2020
    Applicant: California Institute of Technology
    Inventors: Rebecca Saive, Harry A. Atwater, Sisir Yalamanchili, Colton Bukowsky, Thomas Russell
  • Publication number: 20200063487
    Abstract: Systems and methods for transparent materials implementing effectively transparent conductors in accordance with various embodiments of the invention are illustrated. One embodiment includes a window including a first transparent layer of transparent material having a first surface and a second surface, a first plurality of triangular conductors in optical communication with the first transparent layer of glass, wherein each of the first plurality of triangular conductors includes a base side that is parallel to the first surface of the first transparent layer of glass and wherein the first plurality of triangular conductors is configured to redirect a portion of incident light, wherein the portion of incident light travels through both the first surface and the second surface of the first transparent layer of glass.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 27, 2020
    Applicant: California Institute of Technology
    Inventors: Rebecca Saive, Harry A. Atwater, Thomas C.R. Russell, Michael D. Kelzenberg, Lucas J. Myers
  • Publication number: 20200051263
    Abstract: A structured light generator includes a light source configured to emit light, and a first meta optical device including a first metasurface including nanostructures having sub-wavelength dimensions that are less than a wavelength of the light emitted from the light source, the first metasurface being configured to form a distribution of light rays from the light emitted from the light source to thereby radiate structured light.
    Type: Application
    Filed: October 17, 2019
    Publication date: February 13, 2020
    Applicants: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seunghoon HAN, Ali Naqavi, Harry Atwater
  • Publication number: 20200024007
    Abstract: Multi-functional coilable thin-walled structures that can be implemented within space-based satellite modules, and methods for their manufacture are provided. Multi-functional coilable thin-walled structures are comprised of at least one longeron that is capable of rolling and collapsing upon itself. In some embodiments, the coilable thin-walled longeron is a flange longeron. The flange longeron contains at least two major regions: a web and a plurality of flanges. The web region comprises portions of flanges that are bonded to one another. The plurality of flanges separate from one another on the same end of the web region. The plurality of flanges are similar in thickness and shape.
    Type: Application
    Filed: July 17, 2019
    Publication date: January 23, 2020
    Applicant: California Institute of Technology
    Inventors: Sergio Pellegrino, Harry A. Atwater, Seyed Ali Hajimiri, Eleftherios E. Gdoutos, Christophe Leclerc, Fabien A. Royer, Antonio Pedivellano
  • Publication number: 20200028005
    Abstract: Bifacial solar cells have been gaining momentum due to their promise of reducing the price of photovoltaic generated electricity by increasing power output. In addition to front side illumination, bifacial solar cells can also accept photons incident on the rear side. In many embodiments, increased power output values of up to and around 50% can be achieved. In some circumstances, other values can be achieved. For example, ˜40-70% under cloudy conditions and between ˜13-35% under sunny conditions, depending on the height of the ground clearance, can be achieved. Other factors such as but not limited to the (spectral) albedo of the surroundings as well as the geometry in which the cells are mounted can strongly influence the power output. As can readily be appreciated, the exact amount of increased power output can vary widely depending on the configuration and operating conditions of the bifacial solar cell.
    Type: Application
    Filed: January 9, 2019
    Publication date: January 23, 2020
    Applicant: California Institute of Technology
    Inventors: Rebecca Saive, Thomas Russell, Harry A. Atwater
  • Patent number: 10520758
    Abstract: An optical modulating device includes a permittivity change layer having a variable permittivity, a dielectric layer disposed on the permittivity change layer, a nanoantenna disposed on the dielectric layer, and a light-emitting structure disposed adjacent to the permittivity change layer.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: December 31, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seunghoon Han, Ruzan Sokhoyan, Harry Atwater, Ghazaleh Kafaie, Ragip Pala, Yu-Jung Lu, Ho Wai Lee, Yao-Wei Huang, Krishnan Thyagarajan
  • 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
  • Patent number: 10489924
    Abstract: A structured light generator includes a light source configured to emit light, and a first meta optical device including a first metasurface including nanostructures having sub-wavelength dimensions that are less than a wavelength of the light emitted from the light source, the first metasurface being configured to form a distribution of light rays from the light emitted from the light source to thereby radiate structured light.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: November 26, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seunghoon Han, Ali Naqavi, Harry Atwater
  • Publication number: 20190326460
    Abstract: Luminescent solar concentrators having a grid-based PV design can be implemented in many different ways. In several embodiments, the LSC is implemented using infrared luminophore technology combined with a PV design implementing a grid of PV cells. LSCs can incorporate quantum dots that absorb uniformly across the visible spectrum and photoluminesce down-shifted energy light in the infrared wavelength regime. Some embodiments include PV cells utilizing micro-grid structures that can be implemented for scalable and controllably transparent applications, such as but not limited to power windows targeted for building integrated photovoltaic applications. In a number of embodiments, the LSCs can utilize a unique PV cell form factor and spectral filter coatings to increase the thermal insulation of the window and enhance photocurrent capture by a silicon micro-grid.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Applicants: California Institute of Technology, The Regents of the University of California, The Board of Trustees of the University of Illinois
    Inventors: David R. Needell, Haley Bauser, Harry A. Atwater, Armand P. Alivisatos, Ralph Nuzzo, Ognjen Ilic, Colton Bukowsky, Brent A. Koscher, Megan Phelan
  • Patent number: 10454565
    Abstract: A space-based solar power station, a power generating satellite module and/or a method for collecting solar radiation and transmitting power generated using electrical current produced therefrom is provided. Power transmitters can be coordinated as a phased array and the power generated by the phased array is transmitted to one or more power receivers to achieve remote wireless power generation and delivery. In many embodiments, a reference signal is distributed within the space-based solar power station to coordinate the phased array. In several embodiments, determinations of the relative locations of the antennas in the array are generated by an array of sun sensors that estimate the shape of the module to evaluate the phase shift and/or amplitude modulation to apply to the reference signal at each power transmitter.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: October 22, 2019
    Assignee: California Institute of Technology
    Inventors: Sergio Pellegrino, Seyed Ali Hajimiri, Harry A. Atwater, Thibaud Talon
  • Patent number: 10444355
    Abstract: Provided are an optical modulating device and a system employing the same. The optical modulating device includes a phase modulator including a meta surface including a nanoantenna configured to couple light incident on the phase modulator, and including a quantum well layer having a multi-quantum well and configured to modulate a phase of light by modulating a refractive index according to an electrical control, and a reflective layer provided at on the phase modulator opposite to a side of the meta surface of the phase modulator and configured to resonate light coupled through the nanoantenna.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: October 15, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Ragip Pala, Harry Atwater, Muhammad Alam, Duhyun Lee, Byunghoon Na, Seunghoon Han
  • Publication number: 20190312168
    Abstract: Photovoltaics configured to be manufactured without epitaxial processes and methods for such manufacture are provided. Methods utilize bulk semiconducting crystal substrates, such as, for example, GaAs and InP such that epitaxy processes are not required. Nanowire etch and exfoliation processes are used allowing the manufacture of large numbers of photovoltaic cells per substrate wafer (e.g., greater than 100). Photovoltaic cells incorporate electron and hole selective contacts such that epitaxial heterojunctions are avoided during manufacture.
    Type: Application
    Filed: April 2, 2019
    Publication date: October 10, 2019
    Applicant: California Institute of Technology
    Inventors: Phillip R. Jahelka, Harry A. Atwater, Wen-Hui Cheng, Rebecca D. Glaudell
  • Patent number: 10402993
    Abstract: A structured light generator includes a light source configured to emit light, and a first meta optical device including a first metasurface including nanostructures having sub-wavelength dimensions that are less than a wavelength of the light emitted from the light source, the first metasurface being configured to form a distribution of light rays from the light emitted from the light source to thereby radiate structured light.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: September 3, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seunghoon Han, Ali Naqavi, Harry Atwater