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Application of ARP’s terahertz spectrometer with exemplary data The border security is facing a challenge of detecting narcotics dissolved in gasoline or diesel, a smart technique used by the smugglers. ARP’s terahertz technology can be used to discern between pure and contaminated gasoline. It has other important applications as well. This document summarizes experimental data of (1) detection of impurities in gasoline, (2) real-time, online process monitoring, (3) molecular identification, (4) label-free DNA hybridization analysis, and (5) parts per trillion (femto-molar) sensing; thus demonstrating functionality of the technology. The technology can be applied for remote detection of explosives and other controlled substances.