Results 21 to 30 of about 6,090 (227)

An introduction to terahertz time-domain spectroscopic ellipsometry

APL Photonics, 2022
In the past, terahertz spectroscopy has mainly been performed based on terahertz time-domain spectroscopy systems in a transmission or a window/prism-supported reflection configuration.
X. Chen, E. Pickwell-MacPherson
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Ultrafast carrier generation in Bi1-xSbx thin films induced by intense monocycle terahertz pulses [PDF]

EPJ Web of Conferences, 2019
Using terahertz-pump and terahertz-probe spectroscopy, we investigated terahertz-induced carrier generation processes in Bi1-xSbx thin films. The field dependence of the terahertz-induced transmittance change indicates distinct nonlinearity related to ...
Katayama Ikufumi, Kawakami Hiroki, Araki Kotaro, Arashida Yusuke, Minami Yasuo, Nien Lie-Wei, Handegard Orjan Sele, Nagao Tadaaki, Kitajima Masahiro, Takeda Jun   +9 more
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Light-induced Difference Terahertz Spectroscopy [PDF]

Journal of Biological Physics, 2003
Visible/near-infraredlaser-induced difference spectroscopy basedon a time-domain terahertz system has beendeveloped, and used to study copperpathancyonine. We find that the absorptionpeak of this molecule at 1.08 THz changessignificantly under 790 nm laserexcitation, suggesting that we haveobserved the first evidence of vibrationalmode changes in the ...
Y C, Shen, P C, Upadhya, A G, Davies, E H, Linfield   +3 more
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Sum-Frequency Signals in 2D-Terahertz-Terahertz-Raman Spectroscopy [PDF]

The Journal of Physical Chemistry B, 2020
Supplemental information available after main ...
Griffin Mead, Haw-Wei Lin, Ioan-Bogdan Magdău, Thomas F. Miller, Geoffrey A. Blake   +4 more
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Quantitative Determination of Sucrose Adulterated in Red Ginseng by Terahertz Time-Domain Spectroscopy (THz-TDS) with Monte Carlo Uninformative Variable Elimination (MCUVE) and Support Vector Regression (SVR)

Journal of Spectroscopy, 2022
This paper introduces a method to detect the content of sucrose, an adulterant of red ginseng, based on terahertz spectroscopy. Experiments were carried out on red ginseng with 6 levels of adulterated concentrations using terahertz time-domain ...
Shubao Pan, Huo Zhang, Zhi Li, Tao Chen, Xianhua Yin   +4 more
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Diffraction-limited ultrabroadband terahertz spectroscopy [PDF]

Scientific Reports, 2016
AbstractDiffraction is the ultimate limit at which details of objects can be resolved in conventional optical spectroscopy and imaging systems. In the THz spectral range, spectroscopy systems increasingly rely on ultra-broadband radiation (extending over more 5 octaves) making a great challenge to reach resolution limited by diffraction.
Baillergeau, M, Maussang, K, Nirrengarten, T, Palomo, J, Li, LH, Linfield, EH, Davies, AG, Dhillon, S, Tignon, J, Mangeney, J   +9 more
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Terahertz Field Confinement in Nonlinear Metamaterials and Near-Field Imaging

Photonics, 2019
This article reviews recent advances in terahertz science and technology that rely on confining the energy of incident terahertz radiation to small, very sub-wavelength sized regions. We focus on two broad areas of application for such field confinement:
George R. Keiser, Pernille Klarskov
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Terahertz absorption characteristics of ammonium salt solution based on self-sampling microfluidic chip

Scientific Reports, 2022
With the continuous development of terahertz (THz) detection technology, the use of terahertz spectroscopy to study chemical samples has become one of the indispensable tools in the field of biochemistry.
Qinghao Meng, Siyu Qian, Jing Ding, Qingjun Li, Xinyuan Zhao, Bo Su, Cunlin Zhang   +6 more
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Spectral characterization and vibrational mode study of cocrystal of acetaminophen and aspirin based on terahertz/Raman spectroscopy combined with DFT theory calculation

Results in Chemistry
In recent years, pharmaceutical cocrystal has become a hot field in drug development, which improves the solubility, stability, and bioavailability of drugs.
Haofei Sun, Bo Peng, Xinyi Bai, Bo Su, Cunlin Zhang, Hailin Cui, Shengbo Zhang, Kai Li   +7 more
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Machine Learning Techniques for THz Imaging and Time-Domain Spectroscopy

Sensors, 2021
Terahertz imaging and time-domain spectroscopy have been widely used to characterize the properties of test samples in various biomedical and engineering fields.
Hochong Park, Joo-Hiuk Son
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