光谱学与光谱分析 |
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Application of Terahertz Time Domain Spectroscopy to Explosive and Illegal Drug |
LIU Gui-feng1,2,ZHAO Hong-wei1,GE Min1,2,WANG Wen-feng1* |
1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2. Graduate School of the Chinese Academy of Sciences,Beijing 100049, China |
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Abstract Terahertz waves(THz, T-ray) lie between far-infrared and microwave in electromagnetic spectrum with frequency from 0.1 to 10 THz. Many explosives and illicit drugs show characteristic spectral features in the terahertz. Compared with conventional methods of detecting a variety of threats, such as weapons, explosives and illegal drugs, THz radiation is low frequency and non-ionizing, and does not give rise to safety concerns. Moreover, THz can penetrate many barrier materials, such as clothing and common packaging materials. THz technique has a great potential and advantage in antiterrorism and security inspection of explosives and illegal drugs due to the ability of high-sensitivity, nondestructive and stand-off inspection of many substances. The present paper summarizes the latest progress in the application of terahertz time domain spectroscopy (THz-TDS) to explosives and illegal drugs. Studies on RDX are discussed in details and many factors affecting experiments are also introduced.
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Received: 2006-12-05
Accepted: 2007-03-18
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Corresponding Authors:
WANG Wen-feng
E-mail: wfwang@sinap.ac.cn
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