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
doaj +1 more source
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
doaj +1 more source
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
openaire +4 more sources
A 220-to 299-GHz CMOS Terahertz Detector [PDF]
, 2019 This paper proposes a terahertz (THz) detector in a 180-nm standard CMOS process. The detector consists of a square loop antenna and an NMOS transistor. The antenna has two feed ports.
Liu PX(刘鹏翔) +4 more
core +3 more sources
Continuous Wave Terahertz Generation from Photodiode-Based Emitters with up to 200 m W Terahertz Power [PDF]
, 2022 S.769-770The output characteristics of an optoelectronic terahertz (THz) transmitter based on a high-speed, waveguide-integrated photodiode is demonstrated. THz power measurements are performed with a calibrated pyroelectric detector.
Breuer, S. +5 more
core +1 more source
Experimental Comparison of UTC- and PIN-Photodiodes for Continuous-Wave Terahertz Generation [PDF]
, 2022 S.343-354We carried out an experimental comparison study of the two most established optoelectronic emitters for continuous-wave (cw) terahertz generation: a uni-traveling-carrier photodiode (UTC-PD) and a pin-photodiode (PIN-PD).
Deninger, A. +6 more
core +1 more source
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
doaj +1 more source
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
core +1 more source
Fast Terahertz Computed-Tomography Imaging With a Quantum-Cascade Laser and a Scanning Mirror [PDF]
, 2013 A terahertz transmission imaging system based on a quantum-cascade laser (QCL), a fast scanning mirror, and a sensitive Ge:Ga detector is demonstrated. In order to reduce artifacts, special care was taken on the optics and the conversion of the measured
H.-W. Hubers +11 more
core +1 more source
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
doaj +1 more source