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公开(公告)号：US20210025816A1
公开(公告)日：2021-01-28
申请号：US16938152
申请日：2020-07-24
发明人： Holger Breitenborn , Junliang Dong , Riccardo Piccoli , Roberto Morandotti , Luca Razzari , Rafik Naccache , Fiorenzo Vetrone
IPC分类号： G01N21/3581 , G01J5/00
摘要： 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.
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公开(公告)号：US11360022B2
公开(公告)日：2022-06-14
申请号：US16938152
申请日：2020-07-24
发明人： Holger Breitenborn , Junliang Dong , Riccardo Piccoli , Roberto Morandotti , Luca Razzari , Rafik Naccache , Fiorenzo Vetrone
IPC分类号： G01N21/3581 , G01J5/00
摘要： 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.
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公开(公告)号：US11289870B2
公开(公告)日：2022-03-29
申请号：US16784552
申请日：2020-02-07
摘要： A system and a method for generating tunable ultrafast optical pulses, the method comprising spectral broadening of a laser input beam by propagating the laser input beam in a nonlinear medium of a third-order nonlinear susceptibility χ(3), yielding an output laser spectrum; and one of: i) selecting at least one portion of the output laser spectrum, yielding an output pulse different than the input pulse and centered at a different frequency; ii) temporal compensation and spatial spreading of spectral components of the output laser spectrum; selecting two pulses at two different frequencies; and nonlinearly mixing the two pulses together in a first second-order nonlinear susceptibility χ(2) nonlinear crystal into a third pulse centered at a frequency which is a difference between the frequencies of the first two pulses; and iii) dividing output laser spectrum into a pump beam and a probe beam, directing a pump pulse to a third second-order nonlinear crystal for THz radiation generation; and directing a probe pulse to a third second-order nonlinear crystal for THz radiation reconstruction.
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公开(公告)号：US11604139B2
公开(公告)日：2023-03-14
申请号：US17060479
申请日：2020-10-01
IPC分类号： G01N21/3581 , G01N21/21 , H04N5/30
摘要： 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.
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公开(公告)号：US11360023B2
公开(公告)日：2022-06-14
申请号：US17086814
申请日：2020-11-02
IPC分类号： G01N21/3581 , G01J11/00 , G01J3/10 , G01J3/42
摘要： A device, a system and a method for homodyne solid-state biased coherent detection of terahertz pulses in a range between 0.1 and 11 THz, the device comprising a metallic slit between, and parallel to, two longitudinal metallic electrodes, deposited on a surface of a substrate, and covered with a layer of nonlinear material, wherein a width of the metallic slit and a thickness of the nonlinear material layer are selected in relation to a central wavelength of the THz pulses. The method comprises focusing a THz beam and a pulsed laser beam of pulse energies in a range between 10 and 100 nJ onto the metallic slit, the metallic electrodes being biased by a static DC voltage bias selected in a range between 20 VPP and 200 VPP; and retrieving a terahertz pulse waveform using the terahertz pulse repetition rate as synchronism.
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公开(公告)号：US09823124B2
公开(公告)日：2017-11-21
申请号：US15302802
申请日：2015-04-08
发明人： Matteo Clerici , Marco Peccianti , Sze Phing Ho , Anna Mazhorova , Roberto Morandotti , Alessia Pasquazi , Luca Razzari , Yoann Jestin
IPC分类号： G01J1/44 , G01J5/02 , G01J5/20 , G01R29/00 , G01N21/3581
CPC分类号： G01J1/44 , G01J5/024 , G01J5/20 , G01N21/3581 , G01R29/00
摘要： A method and a system for terahertz detection, using at least a first and a second electrodes separated by a centro-symmetric material. The system comprises at least a first and a second electrodes with conductive pads for connection to a voltage source, separated by a centro-symmetric material; the method comprising second harmonic generation in the centro-symmetric material by overlapping of a probe and a terahertz beams.
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