Journal ArticleDOI
Detection and identification of explosives using terahertz pulsed spectroscopic imaging
TLDR
In this article, the absorption spectrum of the explosive 1, 3,5-trinitro-1,3, 5-triazacyclohexane (RDX) has been measured using a conventional Fourier transform infrared spectroscopy and by terahertz pulsed spectroscopic imaging.Abstract:
The absorption spectrum of the explosive 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) has been measured using a conventional Fourier transform infrared spectroscopy and by terahertz pulsed spectroscopy. Seven absorption features in the spectral range of 5–120cm−1 have been observed and identified as the fingerprint of RDX. Furthermore, the spatial distribution of individual chemical substances including RDX, has been mapped out using reflection terahertz spectroscopic imaging in combination with component spatial pattern analysis. This is the terahertz spectroscopy and chemical mapping of explosives obtained using reflection terahertz measurement, and represents a significant advance toward developing a terahertz pulsed imaging system for security screening of explosives.read more
Citations
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Journal ArticleDOI
Terahertz spectroscopy and imaging – Modern techniques and applications
TL;DR: The terahertz time-domain spectroscopy (THz-TDS) as discussed by the authors is a new spectroscopic technique based on coherent and time-resolved detection of the electric field of ultrashort radiation bursts.
Journal ArticleDOI
Terahertz quantum-cascade lasers
TL;DR: In this paper, the state-of-the-art and future prospects for terahertz quantum-cascade laser systems are reviewed, including efforts to increase their operating temperatures, deliver higher output powers and emit longer wavelengths.
Journal ArticleDOI
Imaging with terahertz radiation
TL;DR: A comprehensive review of the various techniques used for terahertz image formation can be found in this paper, as well as numerous examples which illustrate the many exciting potential uses for these emerging technologies.
Journal ArticleDOI
Standoff Detection of Weapons and Contraband in the 100 GHz to 1 THz Region
R. Appleby,H.B. Wallace +1 more
TL;DR: The techniques and technologies currently being investigated to detect weapons and contraband concealed on persons under clothing are reviewed and the basic phenomenology of the atmosphere and materials that must be understood in order to realize such a system are discussed.
Journal ArticleDOI
Terahertz spectroscopy of explosives and drugs
TL;DR: In this paper, the authors describe terahertz time-domain spectroscopy and examine the spectra of a wide range of drugs-of-abuse, pure explosives, and plastic explosives.
References
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Journal ArticleDOI
Materials for terahertz science and technology
Bradley Ferguson,Xi-Cheng Zhang +1 more
TL;DR: Terahertz spectroscopy and imaging provide a powerful tool for the characterization of a broad range of materials, including semiconductors and biomolecules, as well as novel, higher-power terahertz sources.
Journal ArticleDOI
Material parameter estimation with terahertz time-domain spectroscopy
TL;DR: This paper describes a robust algorithm for extracting material parameters from measured terahertz waveforms that simultaneously obtains both the thickness and the complex refractive index of an unknown sample under certain conditions.
Proceedings ArticleDOI
Security applications of terahertz technology
Michael C. Kemp,Philip F. Taday,Bryan E. Cole,Julian Alexander Cluff,Anthony J. Fitzgerald,W. R. Tribe +5 more
TL;DR: In this article, the authors describe a number of proof-of-principle experiments which show that Terahertz imaging has the ability to use very low levels of this non-ionising radiation to detect hidden objects in clothing and common packing materials and envelopes.
Journal ArticleDOI
Using Terahertz pulse spectroscopy to study the crystalline structure of a drug: a case study of the polymorphs of ranitidine hydrochloride.
TL;DR: It is concluded that the Terahertz pulse spectroscopy method has a wide range of applications in pharmaceutical science including formulation, high throughput screening, and inspection in storage.
Journal ArticleDOI
Noncovalent intermolecular forces in polycrystalline and amorphous saccharides in the far infrared
TL;DR: In this paper, the authors used terahertz time-domain spectroscopy to measure the full dielectric function of the monosaccharides glucose and fructose and the disaccharide sucrose in the frequency range 0.5-4.0 THz.