Open AccessStudy on the THz spectrum of methamphetamine
Author(s) -
Ning Li,
Jingling Shen,
Jie Sun,
Liang Lai-shun,
Xiaoyu Xu,
Meihong Lu,
Yan Jia
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.006750
Subject(s) - terahertz radiation , terahertz spectroscopy and technology , absorption (acoustics) , spectroscopy , optics , density functional theory , materials science , absorption spectroscopy , attenuation coefficient , range (aeronautics) , spectral line , physics , quantum mechanics , astronomy , composite material
The spectral absorption features of methamphetamine (MA), one of the most widely consumed illicit drugs in the world, are studied experimentally by Terahertz (THz) time-domain spectroscopy (THz-TDS), and the characteristic absorption spectra are obtained in the range of 0.2 to 2.6 THz. The vibrational frequencies are calculated using the density functional theory (DFT). Theoretical results show significant agreement with experimental results, and identification of vibrational modes are given. The calculated results further confirm that the characteristic frequencies come from the collective vibrational modes. The results suggest that use of the THz-TDS technique can be an effective way to inspect for illicit drugs.