title: Detection and identification of drugs under real conditions by using noisy terahertz broadband pulse.
abstract: We discuss an effective method for detecting and identifying drugs using a high-noise terahertz (THz) signal. We add a noisy THz signal obtained in real conditions to the THz signal transmitted through a sample with the illicit drug methamphetamine. The insufficiency of the standard THz time-domain spectroscopy method is demonstrated, showing that this method detects the spectral features of neutral substances and explosives in a noisy THz signal. The method discussed is based upon time-dependent integral correlation criteria calculated using spectral dynamics of the medium response. We propose a modification of the integral correlation criterion that is less dependent on the spectral characteristics of a noisy signal under investigation.
authors.forename: Vyacheslav A
authors.initials: VA
authors.lastname: Trofimov
authors.forename: Svetlana A
authors.initials: SA
authors.lastname: Varentsova
mesh_terms: D053834:Explosive Agents / Q000032:analysis; D004364:Pharmaceutical Preparations / Q000032:analysis*; D055068:Terahertz Spectroscopy
chemical_list: D053834:Explosive Agents; D004364:Pharmaceutical Preparations