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公开(公告)号：US10979635B2
公开(公告)日：2021-04-13
申请号：US16894945
申请日：2020-06-08
Applicant: Massachusetts Institute of Technology
Inventor： Juejun Hu , Tian Gu , Mikhail Shalaginov
Abstract: Wide-angle optical functionality is beneficial for imaging and image projection devices. Conventionally, wide-angle operation is attained by a complicated assembly of optical elements. Recent advances have led to meta-surface lenses or meta-lenses, which are ultra-thin planar lenses with nanoantennas that control the phase, amplitude, and/or polarization of light. Here, we present a meta-lens capable of diffraction-limited focusing and imaging over an unprecedented >170° angular field of view (FOV). The lens is integrated on a one-piece flat substrate and includes an aperture on one side and a single meta-surface on the other side. The meta-surface corrects third-order Seidel aberrations, including coma, astigmatism, and field curvature. The meta-lens has a planar focal plane, which enables considerably simplified system architectures for imaging and projection. The meta-lens design is generic and can be readily adapted to different meta-atom geometries and wavelength ranges to meet diverse application demands.
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公开(公告)号：US20190331529A1
公开(公告)日：2019-10-31
申请号：US16506142
申请日：2019-07-09
Applicant: Massachusetts Institute of Technology
Inventor： Juejun Hu , Tian Gu , Hongtao Lin , Derek Kita , Anuradha M. Agarwal
Abstract: A spectrometer includes an interferometer having a first interference arm and a second interference arm to produce interference patterns from incident light. At least one of the interference arms includes a series of cascaded optical switches connected by two (or more) waveguides of different lengths. Each optical switch directs the incident light into one waveguide or another, thereby changing the optical path length difference between the first interference arm and the second interference arm. This approach can be extended to multi-mode incident light by placing parallel interferometers together, each of which performs spectroscopy of one single mode in the multi-mode incident light. To maintain the compactness of the spectrometer, adjacent interferometers can share one interference arm.
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公开(公告)号：US20140090686A1
公开(公告)日：2014-04-03
申请号：US13651140
申请日：2012-10-12
Applicant: The Massachusetts Institute of Technology
Inventor： Anuradha M. Agarwal , Brian R. Albert , Lirong Zeng Broderick , Jing Cheng , Juejun Hu , Lionel Kimerling , Jifeng Liu , Jurgen Michel , Xing Sheng
IPC: H01L31/052
CPC classification number: H01L31/0475 , H01L31/0549 , H01L31/068 , H01L31/0693 , H01L31/0735 , H01L31/0749 , H01L31/078 , H01L31/1836 , H01L31/1852 , Y02E10/52 , Y02E10/541 , Y02E10/544 , Y02E10/547
Abstract: Provided in one embodiment is an article, comprising: a substrate comprising silicon; and a plurality of solar cells disposed over the substrate, wherein at least one of the plurality of the solar cells comprises one of: (i) a first semiconductor layer disposed over the substrate, the first layer comprising at least one semiconductor material; and (ii) a first Ge-containing layer disposed over the substrate, the first layer comprising a Ge-containing material, and a second layer disposed over the first layer, the second layer comprising at least one semiconductor material. At least some of the solar cells may comprise semiconductor materials of different bandgap values.
Abstract translation: 在一个实施方案中提供了一种制品，其包括：包含硅的基材; 以及设置在所述基板上的多个太阳能电池，其中所述多个太阳能电池中的至少一个包括以下之一：（i）设置在所述基板上的第一半导体层，所述第一层包括至少一种半导体材料; 和（ii）设置在所述衬底上的第一含Ge层，所述第一层包括含Ge材料，以及设置在所述第一层上的第二层，所述第二层包含至少一种半导体材料。 至少一些太阳能电池可以包括不同带隙值的半导体材料。
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公开(公告)号：US20240122473A1
公开(公告)日：2024-04-18
申请号：US18540256
申请日：2023-12-14
Applicant: Massachusetts Institute of Technology
Inventor： Juejun Hu , Tian GU , Mikhail Shalaginov , Fan YANG
CPC classification number: A61B3/14 , A61B3/12 , G02B1/002 , G02B27/0093 , G02B27/0172 , G06F3/013 , A61B3/113
Abstract: Meta-lens based ocular imaging, near-eye display, and eye-tracking systems are described. The systems can include a single focusing optic and an integrated circuit that provides illumination light and includes an imaging array. The focusing optic includes meta-atoms formed on a substrate. The systems may have no moving parts and achieve imaging or image-projection fields-of-view approaching or exceeding 180 degrees. Because of their low part count, the systems can be robust and have a very small form factor.
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公开(公告)号：US11635546B2
公开(公告)日：2023-04-25
申请号：US16624054
申请日：2018-06-28
Inventor： Hualiang Zhang , Jun Ding , Juejun Hu , Tian Gu , Hanyu Zheng
IPC: G02B1/00 , C23C14/04 , C23C14/06 , G02B5/20 , H01J37/317
Abstract: An optical device as described herein includes a host substrate fabricated from a dielectric material transparent in the Infrared range. Additionally, the optical device as discussed herein includes multiple elements disposed on the host substrate. The multiple elements are spaced apart from each other on the host substrate in accordance with a desired pattern. Each of the multiple elements disposed in the host substrate is fabricated from a second material having a refractive index of greater than 4.5. Such an optical device provides an improvement over conventional optical devices that operate in the Infrared range.
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Patent Agency Ranking
公开(公告)号：US11313725B2
公开(公告)日：2022-04-26
申请号：US16928197
申请日：2020-07-14
Applicant: Massachusetts Institute of Technology
Inventor： Tian Gu , Derek Kita , Juejun Hu
Abstract: State-of-the-art portable Raman spectrometers use discrete free-space optical components that must be aligned well and that don't tolerate vibrations well. Conversely, the inventive spectrometers are made with monolithic photonic integration to fabricate some or all optical components on one or more planar substrates. Photonic integration enables dense integration of components, eliminates manual alignment and individual component assembly, and yields superior mechanical stability and resistance to shock or vibration. These features make inventive spectrometers especially suitable for use in high-performance portable or wearable sensors. They also yield significant performance advantages, including a large (e.g., 10,000-fold) increase in Raman scattering efficiency resulting from on-chip interaction of the tightly localized optical mode and the analyte and a large enhancement in spectral resolution and sensitivity resulting from the integration of an on-chip Fourier-transform spectrometer.
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公开(公告)号：US20210262860A1
公开(公告)日：2021-08-26
申请号：US17243157
申请日：2021-04-28
Applicant: Massachusetts Institute of Technology
Inventor： Juejun Hu , Derek Kita , Jerome Michon
Abstract: A method of performing Raman spectroscopy can include guiding a Raman pump beam with an optical fiber, where the Raman pump beam inducing fluorescence in the optical fiber. The beam and the fluorescence are coupled to a photonic integrated circuit (PIC) via the fiber. The beam is used to excite a sample in optical communication with the PIC via evanescent coupling and induces Raman scattering in the sample. The Raman scattering is collected via the PIC, and the Raman pump beam as well as the fluorescence is filtered out from the Raman scattering via the PIC.
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公开(公告)号：US11041759B2
公开(公告)日：2021-06-22
申请号：US16456188
申请日：2019-06-28
Applicant: Massachusetts Institute of Technology
Inventor： Juejun Hu , Derek Kita , Jerome Michon
Abstract: A method of performing Raman spectroscopy can include guiding a Raman pump beam with an optical fiber, where the Raman pump beam inducing fluorescence in the optical fiber. The beam and the fluorescence are coupled to a photonic integrated circuit (PIC) via the fiber. The beam is used to excite a sample in optical communication with the PIC via evanescent coupling and induces Raman scattering in the sample. The Raman scattering is collected via the PIC, and the Raman pump beam as well as the fluorescence is filtered out from the Raman scattering via the PIC.
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公开(公告)号：US12212853B2
公开(公告)日：2025-01-28
申请号：US17209496
申请日：2021-03-23
Applicant: Massachusetts Institute of Technology
Inventor： Juejun Hu , Tian Gu , Mikhail Shalaginov
IPC: H04N23/698 , G02B1/00 , G02B13/06
Abstract: Wide-angle optical functionality is beneficial for imaging and image projection devices. Conventionally, wide-angle operation is attained by a complicated assembly of optical elements. Recent advances have led to meta-surface lenses or meta-lenses, which are ultra-thin planar lenses with nanoantennas that control the phase, amplitude, and/or polarization of light. Here, we present a meta-lens capable of diffraction-limited focusing and imaging over an unprecedented >170° angular field of view (FOV). The lens is integrated on a one-piece flat substrate and includes an aperture on one side and a single meta-surface on the other side. The meta-surface corrects third-order Seidel aberrations, including coma, astigmatism, and field curvature. The meta-lens has a planar focal plane, which enables considerably simplified system architectures for imaging and projection. The meta-lens design is generic and can be readily adapted to different meta-atom geometries and wavelength ranges to meet diverse application demands.
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公开(公告)号：US12189219B2
公开(公告)日：2025-01-07
申请号：US17183267
申请日：2021-02-23
Applicant: Massachusetts Institute of Technology
Inventor： Juejun Hu , Tian Gu , Yifei Zhang , Carlos Andres Rios Ocampo , Mikhail Shalaginov , Xiaoming Qiu
IPC: G02F1/01
Abstract: Reversible phase-change materials (PCMs) can be added to or incorporated into meta-lenses, wave plates, waveguides, gratings, and other optical components to form active optical devices with controllable and adjustable optical characteristics. Local heating can be used to induce solid-state phase changes and large refractive index changes in the PCMs. The phase and index changes can provide large changes in the device's optical characteristics. Optical devices with PCM can be used for imaging applications, orbital angular momentum control, photonic integrated circuits and optical communication systems, beam steering, and other application.
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