7 March 2006 Analysis of drugs-of-abuse and explosives using terahertz time-domain and Raman spectroscopy
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Abstract
We demonstrate that, through coherent measurement of the transmitted terahertz electric fields, broadband (0.3-8THz) time-domain spectroscopy can be used to measure far-infrared vibrational modes of a range of illegal drugs and high explosives that are of interest to the forensic and security services. Our results show that these absorption features are highly sensitive to the structural and spatial arrangement of the molecules. Terahertz frequency spectra are also compared with high-resolution low-frequency Raman spectra to assist in understanding the low frequency inter- and intra-molecular vibrational modes of the molecules.
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Andrew Burnett, Wenhui Fan, Prashanth Upadhya, John Cunningham, Edmund Linfield, Giles Davies, Howell Edwards, Tasnim Munshi, Andrew O'Neil, "Analysis of drugs-of-abuse and explosives using terahertz time-domain and Raman spectroscopy", Proc. SPIE 6120, Terahertz and Gigahertz Electronics and Photonics V, 61200M (7 March 2006); doi: 10.1117/12.659662; https://doi.org/10.1117/12.659662
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