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Wideband terahertz spectroscopy of explosives

2006; Elsevier BV; Volume: 434; Issue: 4-6 Linguagem: Inglês

10.1016/j.cplett.2006.12.015

1873-4448

Megan R. Leahy-Hoppa, Michael J. Fitch, Xuemei Zheng, L. Michael Hayden, Robert Osiander,

Superconducting and THz Device Technology

Time-domain terahertz spectroscopy (TDTS) has been shown to be a promising tool in detection of explosives and explosive related compounds. To date, TDTS for many explosives has been limited to spectral regions <3 THz. With recent improvements in emitters and sensors of THz radiation, we report the THz absorption spectra over an extended frequency band from 0.5 to 6 THz for four explosives: RDX (1,3,5-trinitroperhydro-1,3,5-triazine), HMX (1,3,5,7-tetranitroperhydro-1,3,5,7-tetrazocine), PETN (pentaerythritol tetranitrate), and TNT (2,4,6-trinitrotoluene). New distinctive spectral features are shown in these materials between 3 and 6 THz. These data may aide in the spectral identification of these explosives.