Patents by Inventor Junliang Dong

Junliang Dong 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).

  • Publication number: 20240385110
    Abstract: A method and a system for single-shot multi-frame ultrafast terahertz imaging of a scene, the method comprising generating a pump beam and a probe beam: generating a THz beam from the pump beam and passing the THz beam through the scene: multiplexing the probe beam in the time domain and in the spatial-frequency domain. yielding a multiplexed probe beam; detecting a THz beam passing through the scene: guiding the multiplexed probe beam to a THz detection crystal and converting the multiplexed probe beam into mutually orthogonal linear polarized beams: guiding the mutually orthogonal linear polarized beams to a camera: and recovering frames of the scene from multiplexed images acquired by the camera.
    Type: Application
    Filed: June 14, 2022
    Publication date: November 21, 2024
    Inventors: JUNLIANG DONG, PEI YOU, ALESSANDRO TOMASINO, AYCAN YURTSEVER, YOANN JESTIN, ROBERTO MORANDOTTI
  • Patent number: 11604139
    Abstract: Real-time multidimensional terahertz imaging system and method, the method comprising method for imaging an object, comprising, in a laser pump line: patterning a laser pump beam with known patterns of a radiation beam and illuminating the object with the radiation beam; yielding a patterned pump beam; directing the patterned beam from the pump line and a laser probe beam from a laser probe line to a detection crystal; single-shot detection of the radiation beam waveform; and correlating the single-shot detection and the known patterns.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: March 14, 2023
    Assignee: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Riccardo Piccoli, Luca Razzari, Luca Zanotto, Junliang Dong, Roberto Morandotti
  • Patent number: 11588573
    Abstract: A THz waveguide is described, comprising four conductive wires separated by an air gap, the THz waveguide allowing low-loss and dispersion-free propagation of a THz signal. The system for terahertz polarization-division multiplexing comprises at least two THz sources, a THz waveguide and a THz receiver, wherein said THz waveguide comprises four conductive wires separated by an air gap; THz pulses from the THz sources being coupled into the THz waveguide; the THz waveguide transmitting the THz pulses independently, the THz waveguide operating as a broadband polarization-division multiplexer. The method for terahertz polarization-division multiplexing, comprising multiplexing THz pulses from terahertz sources in free-space, coupling resulting multiplexed THz pulses into a THz waveguide comprising four conductive wires separated by an air gap; and demultiplexing the multiplexed THz pulses after propagation in the waveguide.
    Type: Grant
    Filed: July 16, 2021
    Date of Patent: February 21, 2023
    Assignee: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Junliang Dong, Alessandro Tomasino, Giacomo Balistreri, Aycan Yurtsever, José Azaña, Yoann Jestin, Roberto Morandotti
  • Patent number: 11360022
    Abstract: A method and a system for determining material-, size-, and morphology-dependent photothermal properties of particles dispersed in solutions, the method comprising using coherently detected pulsed THz radiation, tracking a temperature-dependent refractive index change of the particles dispersion in time and space, and correlating the temperature-dependent refractive index change of the particles dispersion in time and space to temperature values. A system comprises a source of electromagnetic radiation; a THz emitter; a THz detector; and a vessel containing a dispersion of particles, wherein the source of electromagnetic radiation is configured to emit electromagnetic radiation to excite the particles in the dispersion; the THz emitter is configured to send THz radiation to the vessel and the THz detector is configured to receives THz radiation returned by from the vessel.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: June 14, 2022
    Inventors: Holger Breitenborn, Junliang Dong, Riccardo Piccoli, Roberto Morandotti, Luca Razzari, Rafik Naccache, Fiorenzo Vetrone
  • Publication number: 20220082872
    Abstract: A waveguide for time-domain integration of THz pulses, comprising two wires extending from an input gap gin to an output gap gout at a tapering angle ? relative to a longitudinal axis, a gap of the waveguide decreasing linearly from the input gap gin to the output gap gout, wherein a size of the output gap is at least one order of magnitude smaller than a central wavelength ?THz in a spectrum of the THz pulses, and a method for time-domain integration of THz pulses, comprising confining input THz pulses in the waveguide.
    Type: Application
    Filed: September 2, 2021
    Publication date: March 17, 2022
    Inventors: Alessandro TOMASINO, Giacomo BALISTRERI, Junliang DONG, Yoann JESTIN, Aycan YURTSEVER, José AZAÑA, Roberto MORANDOTTI
  • Publication number: 20220021473
    Abstract: A THz waveguide is described, comprising four conductive wires separated by an air gap, the THz waveguide allowing low-loss and dispersion-free propagation of a THz signal. The system for terahertz polarization-division multiplexing comprises at least two THz sources, a THz waveguide and a THz receiver, wherein said THz waveguide comprises four conductive wires separated by an air gap; THz pulses from the THz sources being coupled into the THz waveguide; the THz waveguide transmitting the THz pulses independently, the THz waveguide operating as a broadband polarization-division multiplexer. The method for terahertz polarization-division multiplexing, comprising multiplexing THz pulses from terahertz sources in free-space, coupling resulting multiplexed THz pulses into a THz waveguide comprising four conductive wires separated by an air gap; and demultiplexing the multiplexed THz pulses after propagation in the waveguide.
    Type: Application
    Filed: July 16, 2021
    Publication date: January 20, 2022
    Inventors: Junliang DONG, Alessandro TOMASINO, Giacomo BALISTRERI, Aycan YURTSEVER, José AZAÑA, Yoann JESTIN, Roberto MORANDOTTI
  • Publication number: 20210096066
    Abstract: Real-time multidimensional terahertz imaging system and method, the method comprising method for imaging an object, comprising, in a laser pump line: patterning a laser pump beam with known patterns of a radiation beam and illuminating the object with the radiation beam; yielding a patterned pump beam; directing the patterned beam from the pump line and a laser probe beam from a laser probe line to a detection crystal; single-shot detection of the radiation beam waveform; and correlating the single-shot detection and the known patterns.
    Type: Application
    Filed: October 1, 2020
    Publication date: April 1, 2021
    Inventors: RICCARDO PICCOLI, LUCA RAZZARI, LUCA ZANOTTO, JUNLIANG DONG, ROBERTO MORANDOTTI
  • Publication number: 20210025816
    Abstract: A method and a system for determining material-, size-, and morphology-dependent photothermal properties of particles dispersed in solutions, the method comprising using coherently detected pulsed THz radiation, tracking a temperature-dependent refractive index change of the particles dispersion in time and space, and correlating the temperature-dependent refractive index change of the particles dispersion in time and space to temperature values. A system comprises a source of electromagnetic radiation; a THz emitter; a THz detector; and a vessel containing a dispersion of particles, wherein the source of electromagnetic radiation is configured to emit electromagnetic radiation to excite the particles in the dispersion; the THz emitter is configured to send THz radiation to the vessel and the THz detector is configured to receives THz radiation returned by from the vessel.
    Type: Application
    Filed: July 24, 2020
    Publication date: January 28, 2021
    Inventors: Holger Breitenborn, Junliang Dong, Riccardo Piccoli, Roberto Morandotti, Luca Razzari, Rafik Naccache, Fiorenzo Vetrone