Patents by Inventor Brian J. Roxworthy
Brian J. Roxworthy 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: 11921363Abstract: An interferometer comprises a plurality of waveguide branches comprising a plurality of bus waveguides and a plurality of photonic resonators. A first waveguide branch of the plurality of waveguide branches comprises a first photonic resonator coupled to a first bus waveguide. The first photonic resonator is disposed to couple and circle a first portion of an optical beam at the first photonic resonator to generate a first phase shift of the first portion of the optical beam, where the first phase shift is the same as a second phase shift of a second photonic resonator coupled to a second bus waveguide. The interferometer forms at least a portion of an in-phase and quadrature (IQ) modulator.Type: GrantFiled: January 9, 2023Date of Patent: March 5, 2024Assignee: Aeva, Inc.Inventors: Brian J. Roxworthy, Pradeep Srinivasan
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Patent number: 11808851Abstract: A system including one or more waveguides to receive a first returned reflection having a first lag angle and generate a first waveguide signal, receive a second returned reflection having a second lag angle different from the first lag angle, and generate a second waveguide signal. The system includes one or more photodetectors to generate a first output signal within a first frequency range, and generate, based on the second waveguide signal and a second LO signal, a second output signal within a second frequency range. The system includes an optical frequency shifter (OFS) to shift a frequency of the second LO signal to cause the second output signal to shift from within the second frequency range to within the first frequency range to generate a shifted signal. The system includes a processor to receive the shifted signal to produce one or more points in a point set.Type: GrantFiled: June 20, 2022Date of Patent: November 7, 2023Assignee: Aeva, Inc.Inventors: Brian J. Roxworthy, Pradeep Srinivasan, Ashwin Samarao
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Patent number: 11754785Abstract: Methods and apparatuses for mode conversion. An apparatus that includes a substrate, a first waveguide, a second waveguide, a micro-electro-mechanical systems (MEMS) perturber, and a controller is provided. The first waveguide is formed on the substrate includes: (i) an input section, (ii) a bend section, and (iii) an output section. The second waveguide is also formed on the substrate and is disposed adjacent to a portion of the input section of the first waveguide. A portion of the second waveguide is separated from the input section of the first waveguide by a coupling gap. The perturber is disposed above the first waveguide and configured to move between a first position that is distal from a surface of the input section of the first waveguide and a second position that is closer to the surface of the input section of the first waveguide than the second position. The controller is configured to control a movement of the perturber between the first position and the second position.Type: GrantFiled: August 20, 2021Date of Patent: September 12, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Marcel W. Pruessner, Dmitry A. Kozak, Todd H. Stievater, Brian J. Roxworthy
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Publication number: 20230161183Abstract: An interferometer comprises a plurality of waveguide branches comprising a plurality of bus waveguides and a plurality of photonic resonators. A first waveguide branch of the plurality of waveguide branches comprises a first photonic resonator coupled to a first bus waveguide. The first photonic resonator is disposed to couple and circle a first portion of an optical beam at the first photonic resonator to generate a first phase shift of the first portion of the optical beam, where the first phase shift is the same as a second phase shift of a second photonic resonator coupled to a second bus waveguide. The interferometer forms at least a portion of an in-phase and quadrature (IQ) modulator.Type: ApplicationFiled: January 9, 2023Publication date: May 25, 2023Inventors: Brian J. Roxworthy, Pradeep Srinivasan
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Publication number: 20230138571Abstract: A system including one or more waveguides to receive a first returned reflection having a first lag angle and generate a first waveguide signal, receive a second returned reflection having a second lag angle different from the first lag angle, and generate a second waveguide signal. The system includes one or more photodetectors to generate a first output signal within a first frequency range, and generate, based on the second waveguide signal and a second LO signal, a second output signal within a second frequency range. The system includes an optical frequency shifter (OFS) to shift a frequency of the second LO signal to cause the second output signal to shift from within the second frequency range to within the first frequency range to generate a shifted signal. The system includes a processor to receive the shifted signal to produce one or more points in a point set.Type: ApplicationFiled: June 20, 2022Publication date: May 4, 2023Inventors: Brian J. Roxworthy, Pradeep Srinivasan, Ashwin Samarao
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Publication number: 20230055779Abstract: Methods and apparatuses for mode conversion. An apparatus that includes a substrate, a first waveguide, a second waveguide, a micro-electro-mechanical systems (MEMS) perturber, and a controller is provided. The first waveguide is formed on the substrate includes: (i) an input section, (ii) a bend section, and (iii) an output section. The second waveguide is also formed on the substrate and is disposed adjacent to a portion of the input section of the first waveguide. A portion of the second waveguide is separated from the input section of the first waveguide by a coupling gap. The perturber is disposed above the first waveguide and configured to move between a first position that is distal from a surface of the input section of the first waveguide and a second position that is closer to the surface of the input section of the first waveguide than the second position. The controller is configured to control a movement of the perturber between the first position and the second position.Type: ApplicationFiled: August 20, 2021Publication date: February 23, 2023Inventors: Marcel W. Pruessner, Dmitry A. Kozak, Todd H. Stievater, Brian J. Roxworthy
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Patent number: 11550171Abstract: An interferometer comprises a plurality of waveguide branches comprising a plurality of bus waveguides and a plurality of photonic resonators. A first waveguide branch of the plurality of waveguide branches comprises a first photonic resonator coupled to a first bus waveguide. The first photonic resonator is disposed to couple and circle a first portion of an optical beam at the first photonic resonator to generate a first phase shift of the first portion of the optical beam, where the first phase shift is the same as a second phase shift of a second photonic resonator coupled to a second bus waveguide.Type: GrantFiled: November 30, 2021Date of Patent: January 10, 2023Assignee: Aeva, Inc.Inventors: Brian J. Roxworthy, Pradeep Srinivasan
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Publication number: 20220221742Abstract: An interferometer comprises a plurality of waveguide branches comprising a plurality of bus waveguides and a plurality of photonic resonators. A first waveguide branch of the plurality of waveguide branches comprises a first photonic resonator coupled to a first bus waveguide. The first photonic resonator is disposed to couple and circle a first portion of an optical beam at the first photonic resonator to generate a first phase shift of the first portion of the optical beam, where the first phase shift is the same as a second phase shift of a second photonic resonator coupled to a second bus waveguide.Type: ApplicationFiled: November 30, 2021Publication date: July 14, 2022Inventors: Brian J. Roxworthy, Pradeep Srinivasan
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Patent number: 11372105Abstract: A system including one or more waveguides to receive a first returned reflection having a first lag angle and generate a first waveguide signal, receive a second returned reflection having a second lag angle different from the first lag angle, and generate a second waveguide signal. The system includes one or more photodetectors to generate a first output signal within a first frequency range, and generate, based on the second waveguide signal and a second LO signal, a second output signal within a second frequency range. The system includes an optical frequency shifter (OFS) to shift a frequency of the second LO signal to cause the second output signal to shift from within the second frequency range to within the first frequency range to generate a shifted signal. The system includes a processor to receive the shifted signal to produce one or more points in a point set.Type: GrantFiled: October 6, 2021Date of Patent: June 28, 2022Assignee: Aeva, Inc.Inventors: Brian J. Roxworthy, Pradeep Srinivasan, Ashwin Samarao
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Patent number: 11209677Abstract: An interferometer comprises a plurality of waveguide branches, where each waveguide branch of the plurality of waveguide branches is disposed to shift a phase of a corresponding portion of the optical beam. Each waveguide branch comprises a bus waveguide and a photonic resonator coupled to the bus waveguide, where the photonic resonator is disposed proximate to the bus waveguide, and where the photonic resonator is disposed to couple and circle the corresponding portion of the optical beam, at the photonic resonator, one or more times to shift the phase of the corresponding portion of the optical beam.Type: GrantFiled: January 14, 2021Date of Patent: December 28, 2021Assignee: Aeva, Inc.Inventors: Brian J. Roxworthy, Pradeep Srinivasan
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Patent number: 10315951Abstract: A pillar-nanoantenna array structure is fabricated with a substrate to which pairs of pillars are coupled, where the pillars are characterized either by a thermal conductance less than 0.1 ?W/deg or by transparency and a height exceeding thickness by at least a factor of two. Metallic caps atop a neighboring pair of pillars are separated by no more than 50 nm. An image-capture structure may be formed by modifying reflectance of a portion of the structure by heating of the portion by electromagnetic radiation. The array may be plastically deformed by raster scanning an electron beam across the array, exciting plasmon modes in the conducting particles thereby inducing a gradient force between neighboring conducting particles, and deforming neighboring pillars in such a manner as to vary the spacing separating neighboring conducting particles. A technique of plasmon-assisted etching provides for fabricating specified planar pattern of metal outside a cleanroom environment.Type: GrantFiled: June 14, 2016Date of Patent: June 11, 2019Assignee: The Board of Trustees of the University of IllinoisInventors: Kimani C. Toussaint, Brian J. Roxworthy, Abdul Monnag Bhuiya
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Patent number: 10247860Abstract: A localized gap plasmon resonator includes: a pad including: a first plasmonic material to support a surface plasmon; and a first plasmon surface; a nanoelectromechanical (NEM) member disposed opposing the first plasmon surface of the pad and spaced apart from the pad by a plasmon gap, the plasmon gap supporting a plasmon resonance; and a plasmonic nanoprism disposed on the NEM member and including: a second plasmonic material to support a surface plasmon; and a second plasmon surface, such that: the second plasmon surface of the plasmonic nanoprism opposes the first plasmon surface of the pad; and the pad, the plasmonic nanoprism, and the plasmon gap support a localized gap plasmon (LGP) mode.Type: GrantFiled: February 2, 2017Date of Patent: April 2, 2019Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCEInventors: Vladimir A. Aksyuk, Brian J. Roxworthy, J. Alexander Liddle
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Publication number: 20170242163Abstract: A localized gap plasmon resonator includes: a pad including: a first plasmonic material to support a surface plasmon; and a first plasmon surface; a nanoelectromechanical (NEM) member disposed opposing the first plasmon surface of the pad and spaced apart from the pad by a plasmon gap, the plasmon gap supporting a plasmon resonance; and a plasmonic nanoprism disposed on the NEM member and including: a second plasmonic material to support a surface plasmon; and a second plasmon surface, such that: the second plasmon surface of the plasmonic nanoprism opposes the first plasmon surface of the pad; and the pad, the plasmonic nanoprism, and the plasmon gap support a localized gap plasmon (LGP) mode.Type: ApplicationFiled: February 2, 2017Publication date: August 24, 2017Inventors: VLADIMIR A. AKSYUK, IV, BRIAN J. ROXWORTHY, J. ALEXANDER LIDDLE
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Publication number: 20160370568Abstract: A pillar-nanoantenna array structure is fabricated with a substrate to which pairs of pillars are coupled, where the pillars are characterized either by a thermal conductance less than 0.1 ?W/deg or by transparency and a height exceeding thickness by at least a factor of two. Metallic caps atop a neighboring pair of pillars are separated by no more than 50 nm. An image-capture structure may be formed by modifying reflectance of a portion of the structure by heating of the portion by electromagnetic radiation. The array may be plastically deformed by raster scanning an electron beam across the array, exciting plasmon modes in the conducting particles thereby inducing a gradient force between neighboring conducting particles, and deforming neighboring pillars in such a manner as to vary the spacing separating neighboring conducting particles. A technique of plasmon-assisted etching provides for fabricating specified planar pattern of metal outside a cleanroom environment.Type: ApplicationFiled: June 14, 2016Publication date: December 22, 2016Inventors: Kimani C. Toussaint, Brian J. Roxworthy, Abdul Monnag Bhuiya