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公开(公告)号：US11162841B2
公开(公告)日：2021-11-02
申请号：US16692776
申请日：2019-11-22
Inventor： Seunghoon Han , Amir Arbabi , Andrei Faraon , Ehsan Arbabi
Abstract: A spectrometer includes a substrate; a slit which is provided on the substrate and through which light is incident onto the substrate; a metasurface including nanostructures that is configured to reflect and focus the light incident thereon through the slit, at different angles based on respective wavelengths; and a sensor which is provided on one side of the substrate that is opposite to another side of the substrate at which the metasurface is disposed, and configured to receive the light from the metasurface.
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公开(公告)号：US11092486B2
公开(公告)日：2021-08-17
申请号：US16213810
申请日：2018-12-07
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： MohammadSadegh Faraji-Dana , Ehsan Arbabi , Amir Arbabi , Andrei Faraon
Abstract: Compact optical devices such as spectrometers are realized with metasurfaces within a dielectric medium confined by reflective surfaces. The metasurfaces control the phase profiles of the reflected electromagnetic waves within the device. In a compact spectrometer, the metasurfaces within the device separate the electromagnetic waves in different wavelengths. The metasurfaces are designed according to their phase profile by varying the size of the array of scatterers.
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公开(公告)号：US11450970B2
公开(公告)日：2022-09-20
申请号：US16209788
申请日：2018-12-04
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Seyedeh Mahsa Kamali , Ehsan Arbabi , Andrei Faraon
IPC: H01Q1/42 , H01Q15/24 , G02B27/09 , G02B27/44 , G03F7/20 , G02F1/00 , G02B5/30 , G02B1/00 , G02B27/00
Abstract: Cascaded metasurfaces can control the phase, amplitude and polarization of an electromagnetic beam, shaping it in three dimensional configuration not achievable with other methods. Each cascaded metasurface has dielectric or metallic scatterers arranged in a period array. The shape of the scatterers determines the three dimensional configuration of the output beam and is determined with iterative calculations through computational simulations.
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公开(公告)号：US20200256725A1
公开(公告)日：2020-08-13
申请号：US16692776
申请日：2019-11-22
Inventor： Seunghoon Han , Amir Arbabi , Andrei Faraon , Ehsan Arbabi
Abstract: A spectrometer includes a substrate; a slit which is provided on the substrate and through which light is incident onto the substrate; a metasurface including nanostructures that is configured to reflect and focus the light incident thereon through the slit, at different angles based on respective wavelengths; and a sensor which is provided on one side of the substrate that is opposite to another side of the substrate at which the metasurface is disposed, and configured to receive the light from the metasurface.
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公开(公告)号：US10578492B2
公开(公告)日：2020-03-03
申请号：US16146523
申请日：2018-09-28
Inventor： Duhyun Lee , Andrei Faraon , Ehsan Arbabi , Sadegh Faraji-Dana , Mahsa Seyedeh Kamali , Yu Horie , Chanwook Baik
IPC: G01J4/04
Abstract: A polarimeter for measuring a polarization rotation caused by a measurement object is provided, the polarimeter including an optically active material. The polarimeter includes a light source unit for irradiating a measurement object with light having a specific polarization; an anisotropic meta surface element for splitting reaction light, obtained by reacting the light of the specific polarization irradiated by the light source unit with the measurement object, into first and second reaction light; and a detection unit for detecting the first and second reaction light separated by the anisotropic meta surface element according to polarization. The polarization rotation caused by the measurement object may be calculated by comparing detection signals of the first and second reaction light detected by the detection unit.
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Patent Agency Ranking
公开(公告)号：US11268854B2
公开(公告)日：2022-03-08
申请号：US16677792
申请日：2019-11-08
Inventor： Seunghoon Han , Amir Arbabi , Andrei Faraon , Ehsan Arbabi , Hyeonsoo Park
Abstract: A spectrometer includes a substrate; a slit which is provided on the substrate and through which light is incident onto the substrate; a metasurface including nanostructures that is configured to reflect and focus the light incident thereon through the slit, at different angles based on respective wavelengths; and a sensor which is provided on one side of the substrate that is opposite to another side of the substrate at which the metasurface is disposed, and configured to receive the light from the metasurface.
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公开(公告)号：US10670782B2
公开(公告)日：2020-06-02
申请号：US15410735
申请日：2017-01-19
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Ehsan Arbabi , Amir Arbabi , Seyedeh Mahsa Kamali , Yu Horie , Andrei Faraon
Abstract: Metasurfaces comprise an array of pillars in a lattice. The dimensions of the pillars and the spacing are varied to obtain desired optical properties. The dispersionless metasurfaces can focus optical light over a broad wavelength range. Specific dispersion profiles for the metasurfaces can be designed. Gratings can be fabricated having similar properties as the array of pillars. Pillars in the metasurfaces can have different cross-section profiles.
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公开(公告)号：US11855348B2
公开(公告)日：2023-12-26
申请号：US17843302
申请日：2022-06-17
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Seyedeh Mahsa Kamali , Ehsan Arbabi , Andrei Faraon
IPC: G02B1/00 , G02B27/00 , G02B27/09 , G02B27/44 , G02B5/30 , G02F1/00 , G03F7/00 , G03F7/20 , H01Q1/42 , H01Q15/24
CPC classification number: H01Q15/242 , G02B27/0944 , G02B27/44 , G02F1/00 , G03F7/70408 , H01Q1/422 , H01Q1/425 , G02B1/002 , G02B5/3083 , G02B27/0012
Abstract: Cascaded metasurfaces can control the phase, amplitude and polarization of an electromagnetic beam, shaping it in three dimensional configuration not achievable with other methods. Each cascaded metasurface has dielectric or metallic scatterers arranged in a period array. The shape of the scatterers determines the three dimensional configuration of the output beam and is determined with iterative calculations through computational simulations.
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公开(公告)号：US11385450B2
公开(公告)日：2022-07-12
申请号：US16863181
申请日：2020-04-30
Applicant: California Institute of Technology
Inventor： Hyounghan Kwon , Ehsan Arbabi , Andrei Faraon
Abstract: Quantitative phase gradient microscopes (QPGM) using metasurface layers including birefringent lenses are disclosed. The birefringent lenses are manufactured by patterning nanoposts on two different transparent substrates or on opposite sides of the same transparent substrate. Methods to generate phase gradient images (PGI) of objects using the described devices are also disclosed.
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公开(公告)号：US20220011161A1
公开(公告)日：2022-01-13
申请号：US17486326
申请日：2021-09-27
Inventor： Seunghoon Han , Amir Arbabi , Andrei Faraon , Ehsan Arbabi
Abstract: A spectrometer includes a transparent substrate including a first surface and a second surface that face each other and are substantially parallel to each other; a slit provided on the first surface and through which light is incident onto the transparent substrate; a spectrum optical system including metasurface including a plurality of nanostructures that are two-dimensionally arranged and satisfy a sub-wavelength scattering condition, wherein the metasurface includes a focusing metasurface which includes first nanostructures of the plurality of nanostructures, and is configured to reflect, disperse, and focus the light incident thereon through the slit, at different angles based on respective wavelengths; and a sensor configured to receive the light from the focusing metasurface. When L is a total length of an optical path from the slit to the sensor and D is a thickness of the transparent substrate, L and D satisfy the following inequality: L/D>3.
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