Patents by Inventor Adam Overvig
Adam Overvig 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).
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Patent number: 11906698Abstract: Techniques for creating a replacement for optical elements with diffractive planar components based on metasurfaces are provided. In one example, a substantially flat optical component for lensing incoming electromagnetic radiation having at least one wavelength and a first phase into outgoing electromagnetic radiation having a second phase is provided.Type: GrantFiled: November 22, 2019Date of Patent: February 20, 2024Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Adam Overvig, Sajan Shrestha
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Publication number: 20230367144Abstract: The disclosed matter provides integrated metasurface devices for conversion between a waveguide mode and a free-space optical wave with a designer wavefront. In exemplary embodiments, the integrated metasurface devices include a thin waveguide, a waveguide taper, a leaky-wave metasurface defined within a high refractive index layer of dielectric material, and a low refractive index substrate. The device can manipulate all the four optical degrees of freedom of the free-space wavefront, namely: amplitude, phase, polarization orientation, and polarization ellipticity, by using a leaky-wave metasurface composed of meta-units with four structural degrees of freedom.Type: ApplicationFiled: May 16, 2023Publication date: November 16, 2023Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Andrea Alu, Heqing Huang, Yuan Xu, Adam Overvig
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Publication number: 20230213757Abstract: An optical combiner includes a first layer with a periodic two-dimensional arrangement of structures arranged to support resonance for an input signal of a target wavelength, wherein the structures have a first refractive index. A second layer overlies the structures on the first layer, wherein the second layer includes a second material with a second refractive index, and wherein a difference between the first refractive index and the second refractive index, measured at 587.5 nm, is less than about 1.5. The periodic arrangement of structures is configured such that the optical combiner produces, for the input signal incident on the first layer from air at an oblique elevation angle of greater than about 20°, an output signal with a reflection peak with an average reflection of greater than about 50% within a ± 5° range of the elevation angle.Type: ApplicationFiled: December 9, 2022Publication date: July 6, 2023Inventors: Karl K. Stensvad, Xuexue Guo, Craig R. Schardt, Bing Hao, Andrea Alu, Michele Cotrufo, Adam Overvig
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Patent number: 11675219Abstract: The disclosed subject matter provides systems and methods for spatial and spectral modulation of light. An example system for modulating light can include a substrate and a plurality of meta units, coupled to the substrate and configured to spatially and spectrally modulate the light, wherein the plurality of meta units includes a perturbation and forms a perturbed lattice supporting a quasi-bound state in the continuum.Type: GrantFiled: December 3, 2020Date of Patent: June 13, 2023Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Adam Overvig, Stephanie Malek
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Patent number: 11668497Abstract: Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.Type: GrantFiled: March 21, 2022Date of Patent: June 6, 2023Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Jyotirmoy Mandal, Adam Overvig, Norman Nan Shi, Meng Tian
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Publication number: 20220252309Abstract: Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.Type: ApplicationFiled: March 21, 2022Publication date: August 11, 2022Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Jyotirmoy Mandal, Adam Overvig, Norman Nan Shi, Meng Tian
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Patent number: 11306949Abstract: Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.Type: GrantFiled: June 25, 2019Date of Patent: April 19, 2022Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Jyotirmoy Mandal, Adam Overvig, Norman Nan Shi, Meng Tian
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Publication number: 20200272100Abstract: Systems and methods for controlling optical amplitude and phase of incident electromagnetic are provided, wherein an exemplary system comprises a substrate and a plurality of meta units, attached to the top surface of the substrate and configured to convert the incident electromagnetic radiation into a target electromagnetic radiation by modifying both optical amplitude and phase.Type: ApplicationFiled: February 14, 2020Publication date: August 27, 2020Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Adam Overvig, Sajan Shrestha
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Publication number: 20200096672Abstract: Techniques for creating a replacement for optical elements with diffractive planar components based on metasurfaces are provided. In one example, a substantially flat optical component for lensing incoming electromagnetic radiation having at least one wavelength and a first phase into outgoing electromagnetic radiation having a second phase is provided.Type: ApplicationFiled: November 22, 2019Publication date: March 26, 2020Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Adam Overvig, Sajan Shrestha
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Publication number: 20200025425Abstract: Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.Type: ApplicationFiled: June 25, 2019Publication date: January 23, 2020Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Jyotirmoy Mandal, Adam Overvig, Norman Nan Shi, Meng Tian
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Patent number: 10386097Abstract: Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.Type: GrantFiled: December 18, 2017Date of Patent: August 20, 2019Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Jyotirmoy Mandal, Adam Overvig, Norman Nan Shi, Meng Tian
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Publication number: 20180180331Abstract: Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.Type: ApplicationFiled: December 18, 2017Publication date: June 28, 2018Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORKInventors: Nanfang Yu, Jyotirmoy Mandal, Adam Overvig, Norman Nan Shi