Non-destructive terahertz imaging of illicit drugs using spectral fingerprints.

By K. Kawase, Y. Ogawa, Y. Watanabe, H. Inoue. Optics Express, 2003

1,323 citations recorded by the source corpus.

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.

Subfields: Biophysics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/2513e38647943ba558172969f8c0a4121fda1371

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Citations in the corpus

TERAHERTZ QUALITY CONTROL OF POLYMERIC PRODUCTS (2007, methodology): “In this paper we demonstrate that THz imaging [ 1-6 ] using THz pulses can be used to determine the degree of dispersion, to visualize inhomogeneities in fiberreinforced plastics and to measure the dimensions of injection moulding parts.”
Terahertz Imaging and Sensing Applications With Silicon-Based Technologies (2019, methodology): “Thus, THz spectroscopy is envisioned to provide a complementary technique to midinfrared spectroscopy for illegal drugs [113] and explosives [114] detection and is of particular”
Chemical recognition in terahertz time-domain spectroscopy and imaging (2005, background): “This capability has been demonstrated in experiments with quasi-continuous-wave THz radiation by Kawase and co-workers [18, 19].”
Review of Terahertz Tomography Techniques (2014, background): “For example, explosives [94–97] or illicit drugs [98–100] have been efficiently localized and unambiguously identified within an envelope [101], a parcel, or a suitcase [102].”
Hidden object detection: security applications of terahertz technology (2004, background): “There is also interest in combining the imaging capability of terahertz radiation with the full spectroscopic data for non-destructive testing and detection of illicit drugs.(9) Walther et al.”
7.5% Optical-to-Terahertz Conversion Efficiency Offered by Photoconductive Emitters With Three-Dimensional Plasmonic Contact Electrodes (2014, neutral): “T ERAHERTZ technology has attracted extensive attention because of its unique applications in environmental monitoring, space explorations, chemical identification, material characterization, security screening, medical imaging, and biological sensing [1]–[12].”