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公开(公告)号：US10816828B2
公开(公告)日：2020-10-27
申请号：US15802086
申请日：2017-11-02
发明人： Wonjae Joo , Juhyung Kang , Soojin Kim , Mark L. Brongersma , Shanhui Fan
摘要： 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.
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公开(公告)号：US11067836B2
公开(公告)日：2021-07-20
申请号：US16557347
申请日：2019-08-30
发明人： Wonjae Joo , Juhyung Kang , Soojin Kim , Mark L. Brongersma , Shanhui Fan
摘要： 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.
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公开(公告)号：US11977312B2
公开(公告)日：2024-05-07
申请号：US17394012
申请日：2021-08-04
发明人： Junghyun Park , Mark L. Brongersma , Yifei Wang
IPC分类号： G02F1/29 , B82Y20/00 , G02B1/00 , G02F1/01 , H04B10/548
CPC分类号： G02F1/292 , G02B1/002 , G02F1/0147 , B82Y20/00 , G02F2202/30 , H04B10/548
摘要： Provided is an optical modulator including a substrate, and a plurality of meta units provided on the substrate and spaced apart from each other, wherein at least one of the plurality of meta units includes a metal layer provided on the substrate, a dielectric layer provided an upper surface and side surfaces of the metal layer, and an antenna provided on an upper surface of the dielectric layer, the antenna including phase change material, wherein a refractive index of the phase change material changes based on a voltage applied to the metal layer to modulate incident light.
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公开(公告)号：US11726250B2
公开(公告)日：2023-08-15
申请号：US17101935
申请日：2020-11-23
发明人： Wonjae Joo , Mark L. Brongersma , Junghyun Park
CPC分类号： G02B5/32 , G02B6/2931 , G02F1/292 , G03H1/26 , G03H1/2645 , G03H1/28 , G03H2001/0473 , G03H2001/266 , G03H2222/13 , G03H2222/14
摘要： A beam steering method and device are provided. The beam steering method includes outputting, from a hologram recording medium on which a plurality of signal light beams having different steering information are recorded, signal light beam having specific steering information, by making reference light having a specific characteristic incident on the hologram recording medium. The method further includes obtaining information about an object existing in the external environment based on the output signal light.
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公开(公告)号：US12032266B2
公开(公告)日：2024-07-09
申请号：US17371821
申请日：2021-07-09
发明人： Junghyun Park , Yifei Wang , Mark L. Brongersma
CPC分类号： G02F1/292 , G02F1/0147 , H01Q3/36 , H01Q3/46 , H04B7/0617 , H04B10/548 , G02F2203/10 , G02F2203/50
摘要： Provided is a phase modulator including an antenna pattern, a lower reflective layer spaced apart from the antenna pattern in a vertical direction, a spacer provided between the antenna pattern and the lower reflective layer, and a phase shift pattern included in the spacer, the phase shift pattern including a phase shift material.
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公开(公告)号：US10649303B2
公开(公告)日：2020-05-12
申请号：US15965369
申请日：2018-04-27
发明人： Wonjae Joo , Mark L. Brongersma , Juhyung Kang
摘要： An optical device and an optical system including the optical device are provided. The optical device may include a reflective layer and a plurality of nano-beams spaced apart from the reflective layer. The plurality of nano-beams may be formed as a metasurface. The nano-beams may have a pattern structure having a plurality of metasurface forms, and the distance of the gaps between the plurality of nano-beams and the reflective layer may be adjustable individually or as a whole. The optical device may be a beam steering device or an optical phase modulator.
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公开(公告)号：US11747528B2
公开(公告)日：2023-09-05
申请号：US16557421
申请日：2019-08-30
发明人： Brandon Born , Mark L. Brongersma , Sunghoon Lee
CPC分类号： G02B5/1847 , G02B5/1819 , G02B5/1861 , G02B5/1866 , G02B27/0081 , G02B27/0101 , G02B27/4272 , G02B5/26 , G02B6/29308
摘要： Provided are a diffraction grating device, a method of manufacturing the diffraction grating device, and an optical apparatus including the diffraction grating device. The diffraction grating device includes a diffraction grating arranged on a light reflection substrate. The diffraction grating includes a plurality of diffraction elements, each diffraction element from among the plurality of diffraction elements having a height that causes a destructive interference between first light rays reflected by a top surface therefore and second light rays reflected by a bottom surface thereof, the first and second light rays being incident on the top and bottom surfaces, respectively, at an incidence angle greater than 45°.
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公开(公告)号：US20220013905A1
公开(公告)日：2022-01-13
申请号：US17371821
申请日：2021-07-09
发明人： Junghyun PARK , Yifei Wang , Mark L. Brongersma
摘要： Provided is a phase modulator including an antenna pattern, a lower reflective layer spaced apart from the antenna pattern in a vertical direction, a spacer provided between the antenna pattern and the lower reflective layer, and a phase shift pattern included in the spacer, the phase shift pattern including a phase shift material.
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公开(公告)号：US20210103085A1
公开(公告)日：2021-04-08
申请号：US17101935
申请日：2020-11-23
发明人： Wonjae Joo , Mark L. Brongersma , Junghyun Park
摘要： A beam steering method and device are provided. The beam steering method includes outputting, from a hologram recording medium on which a plurality of signal light beams having different steering information are recorded, signal light beam having specific steering information, by making reference light having a specific characteristic incident on the hologram recording medium. The method further includes o obtaining information about an object existing in the external environment based on the output signal light.
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公开(公告)号：US11448918B2
公开(公告)日：2022-09-20
申请号：US16777176
申请日：2020-01-30
发明人： Sunghoon Lee , Mark L. Brongersma , Brandon Born
IPC分类号： G02B5/18 , G02F1/1335 , G02B5/30 , G02B27/01
摘要： Provided are a grating device, a screen including the grating device, a method of manufacturing the screen, and a display apparatus including the screen. The grating device includes a transparent substrate and a diffraction grating arranged on the transparent substrate, the diffraction grating includes a plurality of meta-diffraction patterns, and each meta-diffraction pattern has a curved shape with a center of curvature provided in a direction parallel to the substrate. The screen includes a first polarizer, a second polarizer arranged next to the first polarizer, and a diffraction grating that is transparent to polarized light that has passed through the second polarizer and reflects polarized light having a polarization direction perpendicular to the polarized light, wherein the diffraction grating includes a plurality of meta-diffraction patterns, each meta-diffraction pattern having a curved shape with a center of curvature positioned in a travelling direction of incident light.
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