Non-destructive terahertz imaging of illicit drugs using spectral fingerprints.
TLDR
A novel basic technology for terahertz imaging is developed, which allows detection and identification of drugs concealed in envelopes, by introducing the component spatial pattern analysis.Abstract:
The absence of non-destructive inspection techniques for illicit drugs hidden in mail envelopes has resulted in such drugs being smuggled across international borders freely. We have developed a novel basic technology for terahertz imaging, which allows detection and identification of drugs concealed in envelopes, by introducing the component spatial pattern analysis. The spatial distributions of the targets are obtained from terahertz multispectral transillumination images, using absorption spectra measured with a tunable terahertz-wave source. The samples we used were methamphetamine and MDMA, two of the most widely consumed illegal drugs in Japan, and aspirin as a reference.read more
Citations
More filters
Journal ArticleDOI
Cutting-edge terahertz technology
TL;DR: An overview of the status of the terahertz technology, its uses and its future prospects are presented in this article, with a focus on the use of the waveband in a wide range of applications.
PatentDOI
Active terahertz metamaterial devices
TL;DR: An active metamaterial device capable of efficient real-time control and manipulation of terahertz radiation is demonstrated, which enables modulation of THz transmission by 50 per cent, an order of magnitude improvement over existing devices.
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
THz imaging and sensing for security applications—explosives, weapons and drugs
John F. Federici,Brian Schulkin,Feng Huang,Dale E. Gary,Robert Barat,Filipe Oliveira,David Zimdars +6 more
TL;DR: In this article, stand-off interferometric imaging and sensing for the detection of explosives, weapons and drugs is emphasized, and future prospects of terahertz technology are discussed.
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.
References
More filters
Journal Article
Materials for terahertz science and technology
TL;DR: Terahertz spectroscopy systems use far infrared radiation to extract molecular spectral information in an otherwise inaccessible portion of the electromagnetic spectrum Materials research is an essential component of modern terahertz systems.
Journal ArticleDOI
Terahertz wave parametric source
TL;DR: In this article, a tunable terahertz (THz) wave source with a frequency range between 0.7 and 3 THz was proposed, using a parametric oscillation of LiNbO3 or MgO-doped LiNiBO3 crystal.
Journal ArticleDOI
Component spatial pattern analysis of chemicals using terahertz spectroscopic imaging
TL;DR: In this article, the separation of the component spatial patterns of chemical samples in transillumination terahertz (THz) images using known spectral curves was demonstrated using a widely tunable coherent THz-wave parametric oscillator source.
Journal ArticleDOI
Component analysis of spatial and spectral patterns in multispectral images. I: Basis
TL;DR: A new (to the authors' knowledge) theory of component pattern analysis in multispectral images is developed by using the methods of principal component analysis and nonlinear optimization with a nonnegativity constraint to demonstrate the effectiveness of the proposed method.