Results 21 to 30 of about 452,793 (301)
Regenerative terahertz quantum detectors [PDF]
APL Photonics, 2021 Because of the ultrafast and photon-driven nature of the transport in their active region, we demonstrate that quantum cascade lasers can be operated as resonantly amplified terahertz detectors with wide RF bandwidth. Tunable responsivities up to 50 V/W and noise equivalent powers down to 100 pW/Hz1/2 are demonstrated at 4.7 THz.
Paolo Micheletti +5 more
openaire +4 more sources
Photonics, 2022 Terahertz wave generation through the optical rectification of 780 nm femtosecond laser pulses in ZnGeP2 crystals has been studied. All of the possible interactions of types I and II were analyzed by modeling and experimentally.
Vladimir Voevodin +4 more
doaj +1 more source
Hemispherical lens integrated room temperature ultra-broadband GaAs HEMT terahertz detector
Frontiers in Physics, 2023 Terahertz (THz) detection has been extensively studied in the application fields of wireless communication, non-destructive imaging and spectrum inspection, etc., in the decades.
Chenyu Yao +8 more
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Efficient photoconductive terahertz detection through photon trapping in plasmonic nanocavities
APL Photonics, 2021 We present a photoconductive terahertz detector that employs a plasmonic nanocavity to offer high-sensitivity and broadband operation when used in a terahertz time-domain spectroscopy system even at very low optical pump power levels.
N. T. Yardimci, D. Turan, M. Jarrahi
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New Antenna for Detecting Polarization States of Terahertz
Frontiers in Physics, 2022 The polarization measurement of terahertz (THz) waves is indispensable in THz time-domain spectroscopy (THz-TDS) applications to detect material properties.
Wei Shi +4 more
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Single Nanowire Photoconductive Terahertz Detectors [PDF]
Nano Letters, 2014 Spectroscopy and imaging in the terahertz (THz) region of the electromagnetic spectrum has proven to provide important insights in fields as diverse as chemical analysis, materials characterization, security screening, and nondestructive testing. However, compact optoelectronics suited to the most powerful terahertz technique, time-domain spectroscopy,
Peng, Kun +11 more
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Advances on terahertz single-pixel imaging
Frontiers in Physics, 2022 Single-pixel imaging is a novel imaging technique that can obtain image information through a single-pixel detector. It can effectively avoid the problem of lack of high-quality area array detectors in the terahertz band, and has attracted the attention ...
Qiao Hu +7 more
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Near-Field Analysis of Terahertz Pulse Generation From Photo-Excited Charge Density Gradients [PDF]
, 2015 Excitation of photo-current transients at semiconductor surfaces by subpicosecond optical pulses gives rise to emission of electromagnetic pulses of terahertz (THz) frequency radiation.
Natrella, M +12 more
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Accurate determination of terahertz optical constants by vector network analyzer of Fabry-Perot response [PDF]
, 2013 This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OL.38.005438.
Wang, X +4 more
core +2 more sources
Design of wideband terahertz pyroelectric detector based on metasurface [PDF]
Journal of Hebei University of Science and TechnologyIn order to solve the problems of low absorption efficiency and small frequency range of traditional terahertz (THz) detectors, a broadband terahertz metasurface pyroelectric detector was proposed by combining a dual metasurface absorption array ...
Ming ZHANG +6 more
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