Results 51 to 60 of about 23,598 (330)

Terahertz quantum-cascade lasers for high-resolution absorption spectroscopy of atoms and ions in plasmas

Semiconductor Science and Technology, 2023
We report on terahertz (THz) quantum-cascade lasers (QCLs) based on GaAs/AlAs heterostructures, which exhibit single-mode emission at 3.360, 3.921, and 4.745 THz. These frequencies are in close correspondence to fine-structure transitions of Al atoms, N+
Xiang Lü, B. Röben, K. Biermann, J. Wubs, U. Macherius, K.-D. Weltmann, J. H. van Helden, L. Schrottke, H. T. Grahn   +8 more
semanticscholar   +1 more source

Characterization and evaluation of oil shale based on terahertz spectroscopy: A review

Energy Reviews, 2023
Oil shale is a fine-grained sedimentary rock rich in organic kerogen, which is a national strategic reserve resource and supplementary energy and shale oil and pyrolysis gas can be obtained through carbonization and pyrolysis.
Xuecong Liu, Kun Zhao, Xinyang Miao, Honglei Zhan   +3 more
doaj   +1 more source

Detection of incoherent broadband terahertz light using antenna-coupled high-electron-mobility field-effect transistors

, 2017
The sensitivity of direct terahertz detectors based on self-mixing of terahertz electromagnetic wave in field-effect transistors is being improved with noise-equivalent power close to that of Schottky-barrier-diode detectors.
Li, Xiang(李想), Li, Xingxin, Luo, Muchang, Qin, Hua(秦华), Sun, Jiandong(孙建东), Sun, Yunfei(孙云飞), Yu, Yao, Zhang, Zhipeng(张志鹏), 孙建东, 秦华   +9 more
core   +1 more source

Application of terahertz spectroscopy in medical microbiological detection

Journal of Physics: Conference Series, 2023
In recent years, pathogenic bacteria and other microorganisms are still a very important aspect of human health. Nowadays, with the rapid development of information science, it has become a new research idea to explore scientific problems from the ...
Xiaohu Ruan, Xiaofu Ruan, Hai Huang
semanticscholar   +1 more source

Fermi volume evolution and crystal field excitations in heavy-fermion compounds probed by time-domain terahertz spectroscopy

, 2019
We measure the quasiparticle weight in the heavy-fermion compound CeCu$_{6-x}$Au$_{x}$ ($x=0,\ 0.1$) by time-resolved THz spectroscopy for temperatures from 2 up to 300\,K.
Fiebig, Manfred, Kroha, Johann, Pal, Shovon, Stockert, Oliver, von Löhneysen, Hilbert, Wetli, Christoph, Zamani, Farzaneh   +6 more
core   +1 more source

Potential of ultraviolet laser pulse-induced current for characterizing the grain size of table sugar

Heliyon, 2023
In this work, we proposed a laser-induced current (LIC) method to investigate the grain-size dependence of the plasma of table sugar induced by a nanosecond (ns) pulsed ultraviolet laser in the size range of 550 μm and achieve the lower power consumption
Xuecong Liu, Kun Zhao, Xinyang Miao, Honglei Zhan   +3 more
doaj   +1 more source

Wideband THz time domain spectroscopy based on optical rectification and electro-optic sampling [PDF]

, 2013
We present an analytical model describing the full electromagnetic propagation in a THz time-domain spectroscopy (THz-TDS) system, from the THz pulses via Optical Rectification to the detection via Electro Optic-Sampling.
A Schneider, AC Busacca, BB Hu, CM Nuss, DA Kleinman, DH Auston, E Berry, F Zernike, G Gallot, G Sharma, G Sharma, G Xu, HA Bethe, HJ Bakker, J Ahn, J Faure, JJ Carey, K Fukunaga, K Gallo, KH Yang, L Mutter, M Bass, M Cherchi, M Clerici, M Peccianti, M Schall, Matteo Clerici, MM Fejer, N Horiuchi, P Mounaix, PA Franken, PH Siegel, Q Chen, T Löffler, WE Torruellas, X Zheng, YJ Ding, YJ Ding, YJ Ding   +38 more
core   +1 more source

Selected Applications of Terahertz Pulses in Medicine and Industry

Applied Sciences, 2022
This article contains a brief summary of areas where terahertz technology is making an impact in research and industrial applications. We cover some of its uses in the pharmaceutical setting, where both imaging and spectroscopy play important roles ...
Philip F. Taday, Michael Pepper, Donald D. Arnone   +2 more
doaj   +1 more source

Time-resolved collapse and revival of the Kondo state near a quantum phase transition

, 2018
One of the most successful paradigms of many-body physics is the concept of quasiparticles: excitations in strongly interacting matter behaving like weakly interacting particles in free space. Quasiparticles in metals are very robust objects. Yet, when a
Fiebig, M., Kliemt, K., Krellner, C., Kroha, J., Pal, S., Stockert, O., von Loehneysen, H., Wetli, Ch.   +7 more
core   +1 more source

Terahertz spectroscopy study of oridonin and ponicidin in the anticancer Chinese herbal medicine Rabdosia rubescens

Frontiers in Plant Science
Rabdosia rubescens, a Chinese herbal medicine with anticancer properties, contains two active ingredients: oridonin and ponicidin. Both compounds exhibit antitumor effects by inducing tumor cell apoptosis and autophagy and inhibiting tumor cell ...
Yang Gao, Yang Gao, Yang Gao, Yang Gao, Zhuang Peng, Zhuang Peng, Zhuang Peng, Zhuang Peng, Huiyu Yang, Huiyu Yang, Huiyu Yang, Huiyu Yang, Xinrui Zhang, Xinrui Zhang, Xinrui Zhang, Xinrui Zhang, Yuhan Zhao, Yuhan Zhao, Yuhan Zhao, Yuhan Zhao, Zeyu Hou, Zeyu Hou, Zeyu Hou, Zeyu Hou, Bo Su, Bo Su, Bo Su, Bo Su, Kai Li, Kai Li, Kai Li, Cunlin Zhang, Cunlin Zhang, Cunlin Zhang   +33 more
doaj   +1 more source