25 May 2011 Terahertz spectroscopy of energetic materials
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Recently, terahertz spectroscopy has attracted increasing interest as a probe of organic molecular crystals such as pharmaceutical compounds and explosives. Terahertz time-domain spectroscopy (THz-TDS) focuses on low-frequency (10-120 cm-1) intermolecular modes that are characteristic of the crystal structure. The prospect of material-specific identification, combined with the ability of THz light to penetrate many common materials, has lead to an emphasis on the prospect of a THz-based, standoff explosives detection device. In this presentation, THz spectra of materials ranging from military-grade explosives to home-made explosive components will be discussed. In addition to the experimental results, THz spectral assignments will be presented based on solid-state density functional theory simulations. Finally, the effect of particle size on the observed spectra will also be considered.
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Ewelina M. Witko, Ewelina M. Witko, Timothy M. Korter, Timothy M. Korter, John Wilkinson, John Wilkinson, Wayne Ouellette, Wayne Ouellette, James Lightstone, James Lightstone, "Terahertz spectroscopy of energetic materials", Proc. SPIE 8023, Terahertz Physics, Devices, and Systems V: Advance Applications in Industry and Defense, 80230M (25 May 2011); doi: 10.1117/12.882905; https://doi.org/10.1117/12.882905

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