Institut National De La Recherche Scientifique

Valorbec Societe En Commandite

Junliang Dong

Roberto Morandotti

Yoann Jestin

Aycan Yurtsever

José Azaña

Luca Razzari

Riccardo Piccoli

Alessandro Tomasino

Giacomo Balistreri

Fiorenzo Vetrone

Rafik Naccache

Holger Breitenborn

Luca Zanotto

Pei You

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.

Single-shot multi-frame ultrafast terahertz imaging method and system

A waveguide for time-domain integration of THz pulses, comprising two wires extending from an input gap gto an output gap gat a tapering angle θ relative to a longitudinal axis, a gap of the waveguide decreasing linearly from the input gap gto the output gap g, wherein a size of the output gap is at least one order of magnitude smaller than a central wavelength λin a spectrum of the THz pulses, and a method for time-domain integration of THz pulses, comprising confining input THz pulses in the waveguide.

Method and system for time-domain integration of broadband terahertz pulses

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.

Real-time multidimensional terahertz imaging system and method

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.

System and method for terahertz polarization-division multiplexing

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.

Method and system for determination of photothermal properties of particles

Growing community of inventors

Longueuil, Canada

Junliang Dong