Patents by Inventor Dirk R. Englund

Dirk R. Englund 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).

  • Patent number: 10359272
    Abstract: A programmable photonic integrated circuit implements arbitrary linear optics transformations in the spatial mode basis with high fidelity. Under a realistic fabrication model, we analyze programmed implementations of the CNOT gate, CPHASE gate, iterative phase estimation algorithm, state preparation, and quantum random walks. We find that programmability dramatically improves device tolerance to fabrication imperfections and enables a single device to implement a broad range of both quantum and classical linear optics experiments. Our results suggest that existing fabrication processes are sufficient to build such a device in the silicon photonics platform.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 23, 2019
    Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Jacob C. Mower, Nicholas C. Harris, Dirk R. Englund, Greg Steinbrecher
  • Publication number: 20180274900
    Abstract: A programmable photonic integrated circuit implements arbitrary linear optics transformations in the spatial mode basis with high fidelity. Under a realistic fabrication model, we analyze programmed implementations of the CNOT gate, CPHASE gate, iterative phase estimation algorithm, state preparation, and quantum random walks. We find that programmability dramatically improves device tolerance to fabrication imperfections and enables a single device to implement a broad range of both quantum and classical linear optics experiments. Our results suggest that existing fabrication processes are sufficient to build such a device in the silicon photonics platform.
    Type: Application
    Filed: September 26, 2017
    Publication date: September 27, 2018
    Inventors: Jacob C. Mower, Nicholas C. Harris, Dirk R. Englund, Greg Steinbrecher
  • Patent number: 9791258
    Abstract: A programmable photonic integrated circuit implements arbitrary linear optics transformations in the spatial mode basis with high fidelity. Under a realistic fabrication model, we analyze programmed implementations of the CNOT gate, CPHASE gate, iterative phase estimation algorithm, state preparation, and quantum random walks. We find that programmability dramatically improves device tolerance to fabrication imperfections and enables a single device to implement a broad range of both quantum and classical linear optics experiments. Our results suggest that existing fabrication processes are sufficient to build such a device in the silicon photonics platform.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: October 17, 2017
    Assignee: Massachusetts Institute of Technology
    Inventors: Jacob C. Mower, Nicholas C. Harris, Dirk R. Englund, Greg Steinbrecher
  • Patent number: 9778113
    Abstract: Techniques for hyperspectral imaging, including a device for hyperspectral imaging including at least one tunable interferometer including a thin layer of material disposed between two or more broadband mirrors. Electrodes placed on either side of the tunable interferometer can be coupled to a voltage control circuit, and upon application of a voltage across the tunable interferometer, the distance between the mirrors can be modulated by physically altering the dimensions of the thin layer of material, which can uniformly load the broadband mirrors. Physically altering the dimensions of the thin layer of material can include one or more of deformation of a soft material, piezostrictrive actuation of a piezostrictrive material, or electrostrictive actuation of an electrostrictive material.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: October 3, 2017
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Dirk R. Englund, Chaitanya Rastogi
  • Patent number: 9632045
    Abstract: Techniques for deterministic switch microscopy include resolving at least one nitrogen vacancy center in a diamond structure. A magnetic field can be applied across the diamond structure and the nitrogen vacancy centers can be optically excited. The nitrogen vacancy centers can be switched from a dark state to a bright state or a bright state by a dark state by applying at least one microwave pulse. A fluorescent response of each nitrogen vacancy center can be detected and a nitrogen vacancy center can be resolved based on the fluorescent response of each nitrogen vacancy center as it corresponds to the orientation of the nitrogen vacancy center relative to the applied magnetic field.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: April 25, 2017
    Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventors: Dirk R. Englund, Edward H. Chen, Ophir Gaathon
  • Patent number: 9599770
    Abstract: Techniques for coupling light into graphene using a planar photonic crystal having a resonant cavity characterized by a mode volume and a quality factor and at least one graphene layer positioned in proximity to the planar photonic crystal to at least partially overlap with an evanescent field of the resonant cavity. At least one mode of the resonant cavity can couple into the graphene layer via evanescent coupling. The optical properties of the graphene layer can be controlled, and characteristics of the graphene-cavity system can be detected. Coupling light into graphene can include electro-optic modulation of light, photodetection, saturable absorption, bistability, and autocorrelation.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: March 21, 2017
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Dirk R. Englund, Xuetao Gan
  • Patent number: 9599562
    Abstract: Techniques for imaging a characteristic of a sample with a plurality of conjugates of diamond-metallic nanoparticles having a nitrogen vacancy center. The plurality of conjugates can be exposed to a sample and the nitrogen vacancy centers can be optically pumped. One or more microwave pulses can be applied to the nitrogen vacancy center, and a fluorescent response can be detected.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: March 21, 2017
    Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventor: Dirk R. Englund
  • Patent number: 9568545
    Abstract: Systems and methods for precision optical imaging of electrical currents and temperature in integrated circuits are disclosed herein. In one aspect of the disclosed subject matter, a method for detecting a characteristic of an integrated circuit can include depositing at least one diamond structure, having at least one color center therein, onto a side of the integrated circuit.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: February 14, 2017
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Dirk R. Englund, Matthew E. Trusheim
  • Patent number: 9473301
    Abstract: Techniques for temporal quantum key distribution between at least a first entity and a second entity include measuring an arrival time of each of a plurality of photons within each of a set of time frames. The arrival time can correspond to one of the plurality of time bins within the time frame. Measuring can occur in a randomly selected one of at least two mutually unbiased bases. The mutually unbiased bases can include a basis corresponding to a measurement with dispersion and a basis corresponding to a measurement without dispersion. The randomly selected basis for each time frame can be communicated, via a classical communications channel. A quantum key can be generated from the time bins corresponding to the arrival time of photons within at least some of the time frames for which the randomly selected basis is consistent between the first and the second entity.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: October 18, 2016
    Assignee: The Trustees Of Columbia University In The City of New York
    Inventors: Dirk R. Englund, Pierre Desjardins, Jacob Mower
  • Publication number: 20160245639
    Abstract: A programmable photonic integrated circuit implements arbitrary linear optics transformations in the spatial mode basis with high fidelity. Under a realistic fabrication model, we analyze programmed implementations of the CNOT gate, CPHASE gate, iterative phase estimation algorithm, state preparation, and quantum random walks. We find that programmability dramatically improves device tolerance to fabrication imperfections and enables a single device to implement a broad range of both quantum and classical linear optics experiments. Our results suggest that existing fabrication processes are sufficient to build such a device in the silicon photonics platform.
    Type: Application
    Filed: April 29, 2016
    Publication date: August 25, 2016
    Inventors: Jacob C. Mower, Nicholas C. Harris, Dirk R. Englund, Greg Steinbrecher
  • Publication number: 20160234017
    Abstract: Techniques for temporal quantum key distribution between at least a first entity and a second entity include measuring an arrival time of each of a plurality of photons within each of a set of time frames. The arrival time can correspond to one of the plurality of time bins within the time frame. Measuring can occur in a randomly selected one of at least two mutually unbiased bases. The mutually unbiased bases can include a basis corresponding to a measurement with dispersion and a basis corresponding to a measurement without dispersion. The randomly selected basis for each time frame can be communicated, via a classical communications channel. A quantum key can be generated from the time bins corresponding to the arrival time of photons within at least some of the time frames for which the randomly selected basis is consistent between the first and the second entity.
    Type: Application
    Filed: July 22, 2014
    Publication date: August 11, 2016
    Applicant: The Trustees Of Columbia University In The City of New York
    Inventors: Dirk R. Englund, Pierre Desjardins, Jacob Mower
  • Publication number: 20160216450
    Abstract: Systems and methods for coupling electromagnetic radiation from fiber arrays into waveguides and photonic chips are disclosed. In one aspect of the disclosed subject matter, systems for coupling electromagnetic radiation from an optical fiber into a waveguide are provided. In some embodiments, the system can include at least one optical fiber having a distal portion adapted for allowing a portion of an electromagnetic field to exist outside of the fiber. At least one waveguide can have a surface adapted to receive the distal portion of the fiber and be shaped such that the fiber presses against the waveguide creating a repeatable interface. The fiber and the waveguide are arranged so at least part of the portion of the field existing outside the fiber extends into the waveguide. In another aspect of the disclosed subject matter, methods for coupling electromagnetic radiation from the fiber to a photonic integrated chip are disclosed.
    Type: Application
    Filed: April 14, 2014
    Publication date: July 28, 2016
    Applicant: The Trustees Of Columbia UniverSity In The City Of New York
    Inventors: Dirk R. Englund, Jacob Mower
  • Publication number: 20160202414
    Abstract: Systems and methods for suspended polymer photonic crystal (SPPC) cavities and waveguides are disclosed. In one aspect, photonic crystal cavities are provided. An exemplary photonic crystal cavity can include a substrate having a trench. A polymer film can be suspended above the trench thereby forming a gap between the polymer film and the substrate. The polymer film can include a plurality of holes to thereby form at least one optical cavity. The plurality of holes can have a lattice spacing, and each hole can have a radius. The radius and lattice spacing of the plurality of holes can be adapted to increase a gap-midgap ratio. In another aspect, photonic waveguides are provided. In another, methods for fabricating an SPPC are provided. In another, methods for sensing using a polymer photonic crystal ladder cavity are disclosed. In another, methods for optical filtering using an SPPC waveguide-coupled cavity drop filter are disclosed.
    Type: Application
    Filed: June 10, 2014
    Publication date: July 14, 2016
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: DIRK R. ENGLUND, Xuetao Gan
  • Patent number: 9389063
    Abstract: An interferometer module for quantum processing is described including a substrate having two or more input ports and two or more output ports; multiple photonic pathways embedded in the substrate for conveying photons from the two or more input ports and the two or more output ports; and one or more partial beam splitters embedded in the substrate in a photonic pathway for generating spatial and polarization entanglement.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: July 12, 2016
    Assignee: The Trustees Of Columbia University In The City Of New York
    Inventors: Chee Wei Wong, Franco N. C. Wong, Dirk R. Englund
  • Patent number: 9385654
    Abstract: Techniques for obtaining a frequency standard using the crystal field splitting frequency of nitrogen vacancy center in diamond are disclosed. In certain exemplary embodiments, a microwave field is applied to the diamond and optically exciting the diamond under green light. The photoluminescent response of the diamond is measured by a photodetector. The intensity of the photoluminescent response can be used to determine the phase shift between the microwave and the crystal field splitting frequency. The microwave field frequency can be adjusted until the phase shift is below a predetermined threshold, and the microwave frequency can then be output for use as a standard.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: July 5, 2016
    Assignees: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK, PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Dirk R. Englund, Jonathan Hodges, Mikhail D. Lukin, Norman Y. Yao
  • Publication number: 20160161675
    Abstract: Techniques for coupling light into graphene using a planar photonic crystal having a resonant cavity characterized by a mode volume and a quality factor and at least one graphene layer positioned in proximity to the planar photonic crystal to at least partially overlap with an evanescent field of the resonant cavity. At least one mode of the resonant cavity can couple into the graphene layer via evanescent coupling. The optical properties of the graphene layer can be controlled, and characteristics of the graphene-cavity system can be detected. Coupling light into graphene can include electro-optic modulation of light, photodetection, saturable absorption, bistability, and autocorrelation.
    Type: Application
    Filed: September 30, 2014
    Publication date: June 9, 2016
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: Dirk R. Englund, Xuetao Gan
  • Publication number: 20160161429
    Abstract: Techniques for deterministic switch microscopy include resolving at least one nitrogen vacancy center in a diamond structure. A magnetic field can be applied across the diamond structure and the nitrogen vacancy centers can be optically excited. The nitrogen vacancy centers can be switched from a dark state to a bright state or a bright state by a dark state by applying at least one microwave pulse. A fluorescent response of each nitrogen vacancy center can be detected and a nitrogen vacancy center can be resolved based on the fluorescent response of each nitrogen vacancy center as it corresponds to the orientation of the nitrogen vacancy center relative to the applied magnetic field.
    Type: Application
    Filed: March 27, 2014
    Publication date: June 9, 2016
    Inventors: Dirk R. Englund, Edward H. Chen, Ophir Gaathon
  • Patent number: 9354039
    Abstract: A programmable photonic integrated circuit implements arbitrary linear optics transformations in the spatial mode basis with high fidelity. Under a realistic fabrication model, we analyze programmed implementations of the CNOT gate, CPHASE gate, iterative phase estimation algorithm, state preparation, and quantum random walks. We find that programmability dramatically improves device tolerance to fabrication imperfections and enables a single device to implement a broad range of both quantum and classical linear optics experiments. Our results suggest that existing fabrication processes are sufficient to build such a device in the silicon photonics platform.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: May 31, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Jacob C. Mower, Nicholas C. Harris, Dirk R. Englund, Greg Steinbrecher
  • Publication number: 20160077004
    Abstract: Techniques for imaging a characteristic of a sample with a plurality of conjugates of diamond-metallic nanoparticles having a nitrogen vacancy center. The plurality of conjugates can be exposed to a sample and the nitrogen vacancy centers can be optically pumped. One or more microwave pulses can be applied to the nitrogen vacancy center, and a fluorescent response can be detected.
    Type: Application
    Filed: November 25, 2015
    Publication date: March 17, 2016
    Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventor: Dirk R. Englund
  • Publication number: 20160052789
    Abstract: Techniques for fabricating diamond nanostructures including application of a self-assembled hard mask to a surface of a diamond substrate to define a pattern of masked regions having a predetermined diameter surrounded by an exposed portion. The exposed portion can be vertically etched to a predetermined depth using inductively coupled plasma to form a plurality of nanoposts corresponding to the masked regions. The nanoposts can be harvested to obtain a nanostructure with a diameter corresponding to the predetermined diameter and a length corresponding to the predetermined depth.
    Type: Application
    Filed: September 1, 2015
    Publication date: February 25, 2016
    Applicant: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventors: Ophir Gaathon, Dirk R. Englund, Jonathan Hodges, Luozhou Li, Matthew Trushem