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公开(公告)号：US10950749B2
公开(公告)日：2021-03-16
申请号：US16175113
申请日：2018-10-30
Inventor： Duhyun Lee , Ruzan Sokhoyan , Yu-Jung Lu , Ghazaleh Kafaie Shirmanesh , Harry A. Atwater , Ragip A. Pala , Chan-Wook Baik
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.
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公开(公告)号：US10520758B2
公开(公告)日：2019-12-31
申请号：US16002473
申请日：2018-06-07
Inventor： Seunghoon Han , Ruzan Sokhoyan , Harry Atwater , Ghazaleh Kafaie , Ragip Pala , Yu-Jung Lu , Ho Wai Lee , Yao-Wei Huang , Krishnan Thyagarajan
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.
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公开(公告)号：US20240168358A1
公开(公告)日：2024-05-23
申请号：US18516490
申请日：2023-11-21
Applicant: California Institute of Technology
Inventor： Claudio U. Hail , Morgan D. Foley , Ruzan Sokhoyan , Lior Michaeli , Harry A. Atwater
IPC: G02F1/19
CPC classification number: G02F1/19 , G02F2202/30
Abstract: Systems and methods for optical nanostructures that use the interference of high order Mie resonances to locally control wavefront with high quality factor in two dimensions are described. The high-order Mie-resonant metasurfaces can be used to create band-stop filters, beam deflectors, lenses, beam splitters and holograms with high quality factor.
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公开(公告)号：US10012851B2
公开(公告)日：2018-07-03
申请号：US15214919
申请日：2016-07-20
Inventor： Seunghoon Han , Ruzan Sokhoyan , Harry Atwater , Ghazaleh Kafaie , Ragip Pala , Yu-Jung Lu , Ho Wai Lee , Yao-Wei Huang , Krishnan Thyagarajan
CPC classification number: G02F1/0121 , G02B5/008 , G02F1/0102 , G02F1/0147 , H01L33/06 , H01L33/44
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.
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公开(公告)号：US11662504B2
公开(公告)日：2023-05-30
申请号：US16740322
申请日：2020-01-10
Applicant: California Institute of Technology
Inventor： Yonghwi Kim , Pin Chieh Wu , Ruzan Sokhoyan , Kelly W Mauser , Rebecca D Glaudell , Ghazaleh Kafaie Shirmanesh , Harry A Atwater
CPC classification number: G02B1/002 , G02B26/06 , G02F1/0147 , G02F2202/30 , H10N70/231 , H10N70/8613 , H10N70/8828 , H10N70/8833
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.
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Patent Agency Ranking
公开(公告)号：US10921618B2
公开(公告)日：2021-02-16
申请号：US16170573
申请日：2018-10-25
Inventor： Duhyun Lee , Ruzan Sokhoyan , Yu-Jung Lu , Ghazaleh Kafaie Shirmanesh , Harry Atwater , Ragip Pala , Chanwook Baik
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.
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公开(公告)号：US10509297B2
公开(公告)日：2019-12-17
申请号：US15881689
申请日：2018-01-26
Applicant: California Institute of Technology
Inventor： Ghazaleh Kafaie Shirmanesh , Ruzan Sokhoyan , Harry A Atwater
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.
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公开(公告)号：US11204514B2
公开(公告)日：2021-12-21
申请号：US16156628
申请日：2018-10-10
Inventor： Duhyun Lee , Ruzan Sokhoyan , Yu-Jung Lu , Ghazaleh Kafaie Shirmanesh , Harry Atwater , Ragip Pala , Chanwook Baik
IPC: G02F1/03 , G02F1/017 , G02F1/13357 , G02F1/015
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.
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公开(公告)号：US10802301B2
公开(公告)日：2020-10-13
申请号：US16124948
申请日：2018-09-07
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Pin Chieh Wu , Ruzan Sokhoyan , Ghazaleh Kafaie Shirmanesh , Harry A. Atwater
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.
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公开(公告)号：US20200227632A1
公开(公告)日：2020-07-16
申请号：US16740322
申请日：2020-01-10
Applicant: California Institute of Technology
Inventor： Yonghwi Kim , Pin Chieh Wu , Ruzan Sokhoyan , Kelly W. Mauser , Rebecca D. Glaudell , Ghazaleh Kafaie Shirmanesh , Harry A. Atwater
IPC: H01L45/00
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.
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