Results 31 to 40 of about 1,429,782 (326)

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, Zhiquan Wang, Chaofan Li, Lei Hou, Yue Pan   +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, Parkinson, Patrick, Fu, Lan, Gao, Qiang, Jiang, Nian, Guo, Ya-Nan, Wang, Fan, Joyce, Hannah J, Boland, Jessica L, Tan, Hark Hoe, Jagadish, Chennupati, Johnston, Michael B   +11 more
openaire   +4 more sources

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, Qiao Hu, Xudong Wei, Xudong Wei, Yajun Pang, Yajun Pang, Liying Lang, Liying Lang   +7 more
doaj   +1 more source

Ultrabroadband Terahertz Near-Field Nanospectroscopy with a HgCdTe Detector

ACS Photonics, 2023
While near-field infrared nanospectroscopy provides a powerful tool for nanoscale material characterization, broadband nanospectroscopy of elementary material excitations in the single-digit terahertz (THz) range remains relatively unexplored.
Lukas Wehmeier, Meng-Kun Liu, Suji Park, Houk Jang, D. Basov, C. C. Homes, G. L. Carr   +6 more
semanticscholar   +1 more source

Intracavity terahertz optical parametric oscillators [PDF]

, 2011
This thesis describes the design and implementation of several novel, nanosecond pulsed, intracavity optical parametric oscillators for the generation of terahertz radiation.
Walsh, David A.
core   +2 more sources

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, Freeman, JR, Renaud, CC, Graham, CS, Linfield, EH, Moodie, DG, Cannard, PJ, Davies, AG, Mitrofanov, O, Seeds, AJ, Mueckstein, R, Hatem, O, Robertson, MJ   +12 more
core   +1 more source

Design of wideband terahertz pyroelectric detector based on metasurface [PDF]

Journal of Hebei University of Science and Technology
In 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, Junyao ZHANG, Najiao ZHANG, Peng DONG, Baozhu WANG, Yan SHANG, Lei DUAN   +6 more
doaj   +1 more source

A Hard Example Mining Approach for Concealed Multi-Object Detection of Active Terahertz Image

Applied Sciences, 2021
Concealed objects detection in terahertz imaging is an urgent need for public security and counter-terrorism. So far, there is no public terahertz imaging dataset for the evaluation of objects detection algorithms.
Ling Li, Fei Xue, Dong Liang, Xiaofei Chen   +3 more
doaj   +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, H. Richter, Richter, Heiko, Schrottke, Lutz, Grahn, H. T., Hübers, Heinz-Wilhelm, Wienold, Martin, Rothbart, Nick, M. Wienold, L. Schrottke, H. T. Grahn, N. Rothbart   +11 more
core   +1 more source

Resonant Polysilicon Antenna for Terahertz Detection

IEEE Photonics Journal, 2019
Resonant antennas have garnered considerable interest in terahertz and visible regimes owing to its extraordinary localized field concentration capability.
Ze Shen, Xiaoli Ji, Yiming Liao, Ke Wang, Biaobing Jin, Feng Yan   +5 more
doaj   +1 more source