Search Patents
  • Plasmostor: a-metal-oxide-si field effect plasmonic modulator
    Patent number: 7693363
    Abstract: The invention is a system and method for performing all-optical modulation. A semiconductor layer having a defined thickness has an insulator adjacent one surface of the semiconductor. Conductive layers are provided adjacent the semiconductor layer and the insulator. A photodetector is provided to generate an electric field across the conductive layers in response to an input optical gate signal. An input optical signal is modulated by interaction with a plasmon wave generated at the semiconductor/conductive layer interface. By defining the thickness of the semiconductor layer, a desired wavelength of light supports the plasmon waves. Operation of the all-optical modulator requires the provision of an input optical signal of a desired wavelength and the provision of a gate optical signal. An output optical signal is recovered and can be used to store, display or transmit information, for example over a fiber optic communication system, such as a telecommunication system.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: April 6, 2010
    Assignee: California Institute of Technology
    Inventors: Jennifer A. Dionne, Kenneth A. Diest, Luke Sweatlock, Harry A. Atwater
  • Systems and Methods of Particle Identification in Solution
    Publication number: 20220390351
    Abstract: Methods to detect contaminants in a solution and applications thereof are described. Generally, solutions are printed onto a substrate and then imaged via Raman spectroscopy, which can be utilized to detect signals derived from contaminants.
    Type: Application
    Filed: October 15, 2020
    Publication date: December 8, 2022
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Amr A. E. Saleh, Jennifer A. Dionne, Butrus T. Khuri-Yakub, Niaz Banaei
  • Dynamically tunable materials for parity-time symmetric electro-optical devices
    Patent number: 10398005
    Abstract: A device includes a light adjustment apparatus having at least one material having a dielectric permittivity, the at least one material to affect the flow of light, wherein the light adjustment apparatus includes a tunable material to enable adjustment of the dielectric permittivity of the at least one material.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: August 27, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Vladan Jankovic, Jennifer Dionne, Brian Keith Baum, Hadiseh Alaeian, Mark Lawrence
  • Multicomponent alloyed plasmonic photocatalysis
    Publication number: 20230364597
    Abstract: Improved photocatalysis is provided for chemical reactions involving hydrogen in two component plasmon-catalyst nanoparticles. The main idea of this work is to configure the optical illumination of the nano-articles to suppress formation of an undesirable hydride phase in the nanoparticles. This idea is broadly applicable to any chemical reaction involving hydrogen. Specific examples considered experimentally in this work are acetylene hydrogenation to produce ethylene, carbon dioxide reduction and ammonia synthesis.
    Type: Application
    Filed: May 11, 2023
    Publication date: November 16, 2023
    Inventors: Jennifer A. Dionne, Alan Dai, Briley Bourgeois, Daniel K. Angell, Dayne F. Swearer, Lin Yuan
  • Label-free, real-time, whole-cell response monitoring with liquid Raman spectroscopy
    Publication number: 20230324381
    Abstract: Improved surface enhanced Raman spectroscopy (SERS) of biological targets in liquids is provided. Nanoparticles are treated with a surfactant to provide an electrostatic attraction between the nanoparticles and the biological targets. The resulting clustering of the nanoparticles at the biological targets improves the SERS signal, Such SERS spectroscopy enables real time monitoring of the biological targets, thereby enabling a wide variety of assays etc.
    Type: Application
    Filed: September 1, 2021
    Publication date: October 12, 2023
    Inventors: Loza Fekadu Tadesse, Jack HU, Amr Ahmed Essawi Saleh, Stefanie S. Jeffrey, Jennifer A Dionne
  • High quality factor non-uniform metasurfaces
    Publication number: 20210132255
    Abstract: High quality factor electromagnetic metasurfaces are provided. The metasurface is configured to have in plane guided-mode resonances (e.g., corresponding to waveguide modes or the like). Coupling features are included in the metasurface that are configured to couple free-space radiation to the guided mode resonances. The resulting structures have a high-Q response to free-space radiation and can be used for various applications, such as beam splitting, beam steering, and beam focusing or defocusing.
    Type: Application
    Filed: November 4, 2020
    Publication date: May 6, 2021
    Inventors: David Russell Barton, III, Mark Lawrence, Jennifer A. Dionne, Jefferson Dixon
  • Self-isolated nanoscale laser
    Publication number: 20230299551
    Abstract: Self-isolated lasers are provided by using a chiral metasurface in combination with a spin-selective gain medium and symmetry-breaking (i.e., not linearly polarized) optical pumping. In preferred embodiments the chiral metasurface is resonant, thereby proving an integrated optical resonator to support lasing. The chiral metasurface can be the spin-selective gain medium, or it can be formed on a surface of the spin-selective gain medium, or it can be distinct from the spin-selective gain medium.
    Type: Application
    Filed: August 16, 2021
    Publication date: September 21, 2023
    Inventors: Jefferson Dixon, Mark Lawrence, David Russell Barton III, Jennifer A. Dionne
  • Quantum Converting Nanoparticles as In Vivo and In Situ Optical Electric Field Sensors
    Publication number: 20210116488
    Abstract: Quantum converting nanoparticles for electric field sensing are provided. In one example, by combining upconverting lanthanide ions with voltage responsive dyes, we generate an optical platform that displays intensity and spectrum changes in the presence of electric fields. Our particles enable local (down to 10 nm spatial resolution) mapping of electric fields with exceptional photostability. We can image and quantify in vivo and in situ electric fields in biological and material systems up to fields of ˜100 kV/cm.
    Type: Application
    Filed: December 1, 2020
    Publication date: April 22, 2021
    Inventors: Randy Mehlenbacher, Alice Lay, Rea Kolbl, Miriam Goodman, Jennifer Dionne
  • High quality factor non-uniform metasurfaces
    Patent number: 11391866
    Abstract: High quality factor electromagnetic metasurfaces are provided. The metasurface is configured to have in plane guided-mode resonances (e.g., corresponding to waveguide modes or the like). Coupling features are included in the metasurface that are configured to couple free-space radiation to the guided mode resonances. The resulting structures have a high-Q response to free-space radiation and can be used for various applications, such as beam splitting, beam steering, and beam focusing or defocusing.
    Type: Grant
    Filed: November 4, 2020
    Date of Patent: July 19, 2022
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: David Russell Barton, III, Mark Lawrence, Jennifer A. Dionne, Jefferson Dixon
  • Resonant nanophotonic biosensors
    Publication number: 20230341384
    Abstract: Optical sensing of biological targets is provided using a metasurface having guided mode resonances with electric field profiles that extend out from the metasurface. Surface functionalization of such metasurfaces can be used to provide sensing for biological targets, such as nucleic acids, proteins, small molecules, extracellular vesicles, and whole cells. Binding of the target to the surface functionalization can affect the resonance wavelength of the guided mode resonances, thereby providing a sensitive assay for the biological targets.
    Type: Application
    Filed: October 8, 2021
    Publication date: October 26, 2023
    Inventors: Jennifer A. Dionne, John Abendroth, Mark Lawrence, Jack Hu, Fareeha Safir, Jefferson Dixon, Stefanie S. Jeffrey
  • Quantum Converting Nanoparticles as In Vivo and In Situ Optical Electric Field Sensors
    Publication number: 20190235002
    Abstract: Quantum converting nanoparticles for electric field sensing are provided. In one example, by combining upconverting lanthanide ions with voltage responsive dyes, we generate an optical platform that displays intensity and spectrum changes in the presence of electric fields. Our particles enable local (down to 10 nm spatial resolution) mapping of electric fields with exceptional photostability. We can image and quantify in vivo and in situ electric fields in biological and material systems up to fields of ˜100 kV/cm.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Randy Mehlenbacher, Alice Lay, Rea Kolbl, Miriam Goodman, Jennifer Dionne
  • Dynamically tunable materials for parity-time symmetric electro-optical devices
    Patent number: 10178735
    Abstract: A device includes a light adjustment apparatus having a first material and a second material. The first material includes a first real dielectric permittivity and a positive imaginary dielectric permittivity. The second material includes a second real dielectric permittivity and a negative imaginary dielectric permittivity. The first and second materials affect the flow of light. The light adjustment apparatus includes a tunable material to enable adjustment of the dielectric permittivity of the respective materials.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: January 8, 2019
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Vladan Jankovic, Jennifer Dionne, Brian Keith Baum, Hadiseh Alaeian, Mark Lawrence
  • Metasurfaces for optical detection of tissue and fibrous material anisotropy
    Publication number: 20210088819
    Abstract: A metasurface optical device composed of three stacked dielectric layers which form an anti-reflective structure for wavelengths in a predetermined operational wavelength range within the visible spectrum. The anti-reflective structure contains a rectangular lattice of rhombohedral perturbations that produce guided-mode resonances within the predetermined operational wavelength range. The guided-mode-resonant dielectric metasurface device is capable of detecting by colorimetric readout the presence and orientation of a linearly birefringent anisotropic medium, such as a fibrous tissue, positioned above the stacked dielectric layers.
    Type: Application
    Filed: September 24, 2020
    Publication date: March 25, 2021
    Inventors: Jennifer A. Dionne, Lisa V. Poulikakos, Mark Lawrence, David Russell Barton, III
  • Metasurface device for detecting optical chirality
    Publication number: 20220364982
    Abstract: A device for detecting optical chirality includes a metasurface composed of a biperiodic array of nanodisks in the form of a checkerboard array [300], where the nanodisks have diameters d±?/2 such that adjacent nanodisks [302, 304] have diameters that differ by an offset ?. The nanodisks are composed of a dielectric material that is transparent and has a refractive index greater than 2 at a predetermined operational ultraviolet wavelength. The nanodisks have a width-to-height aspect ratio d/h tuned to produce spectral overlap of electric dipole and magnetic dipole modes of incident circularly polarized ultraviolet light.
    Type: Application
    Filed: November 8, 2020
    Publication date: November 17, 2022
    Inventors: Jennifer A. Dionne, Jack Hu, Michelle Solomon, Mark Lawrence
  • Electrically-reconfigurable high quality factor metasurfaces for dynamic wavefront shaping
    Publication number: 20230350266
    Abstract: We utilize high-quality-factor (high-Q) metasurfaces patterned either in or adjacent to electro-optical or thermo-optical materials such as lithium niobate, barium titanate, or thermally-sensitive polymers. The metasurface includes nanoantennas that act as dipole emitters; the particular structure and arrangement of nanoantennas can steer light to particular directions or focus light, The electromagnetic metasurface supports one or more guided mode resonances. The metasurface also includes a perturbation superposed on the metasurface features and configured to couple free-space radiation to the guided mode resonances.
    Type: Application
    Filed: September 15, 2021
    Publication date: November 2, 2023
    Inventors: Jennifer A. Dionne, Mark Lawrence, David Russell Barton III, Elissa Klopfer, Sahil Dagli
  • METHOD AND STRUCTURE FOR PLASMONIC OPTICAL TRAPPING OF NANO-SCALE PARTICLES
    Publication number: 20160049215
    Abstract: Methods and article for optically trapping nano-sized objects by illuminating a coaxial plasmonic aperture are disclosed.
    Type: Application
    Filed: June 5, 2015
    Publication date: February 18, 2016
    Inventors: Jennifer Anne Dionne, Amr Ahmed Essawi Saleh
  • Sub-wavelength Raman imaging with combined optical and electron excitation
    Publication number: 20220268704
    Abstract: Improved stimulated Raman spectroscopy is provided by replacing the Stokes (or anti-Stokes) optical source with a localized electromagnetic emitter that is excited with a non-electromagnetic excitation. Such a localized emitter can be an efficient Stokes (or anti-Stokes) source for stimulated Raman spectroscopy, and can also provide deep sub-wavelength spatial resolution. In a preferred embodiment, an electron beam from an electron microscope is used to excite the localized emitter. This provides combined Raman imaging and electron microscopy that has the two imaging modalities inherently registered with each other.
    Type: Application
    Filed: July 24, 2020
    Publication date: August 25, 2022
    Inventors: Jennifer A. Dionne, Amr Ahmed Essawi Saleh, Daniel K. Angell
  • Metasurfaces for optical detection of tissue and fibrous material anisotropy
    Patent number: 11487180
    Abstract: A metasurface optical device composed of three stacked dielectric layers which form an anti-reflective structure for wavelengths in a predetermined operational wavelength range within the visible spectrum. The anti-reflective structure contains a rectangular lattice of rhombohedral perturbations that produce guided-mode resonances within the predetermined operational wavelength range. The guided-mode-resonant dielectric metasurface device is capable of detecting by colorimetric readout the presence and orientation of a linearly birefringent anisotropic medium, such as a fibrous tissue, positioned above the stacked dielectric layers.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: November 1, 2022
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Jennifer A. Dionne, Lisa V. Poulikakos, Mark Lawrence, David Russell Barton, III
  • METHOD AND STRUCTURE FOR PLASMONIC OPTICAL TRAPPING OF NANO-SCALE PARTICLES
    Publication number: 20140374581
    Abstract: Methods and article for optically trapping nano-sized objects by illuminating a coaxial plasmonic aperture are disclosed.
    Type: Application
    Filed: March 13, 2014
    Publication date: December 25, 2014
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Jennifer Anne Dionne, Amr Ahmed Essawi Saleh
  • Method and structure for plasmonic optical trapping of nano-scale particles
    Patent number: 9281091
    Abstract: Methods and article for optically trapping nano-sized objects by illuminating a coaxial plasmonic aperture are disclosed.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: March 8, 2016
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Jennifer Anne Dionne, Amr Ahmed Essawi Saleh
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