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
摘要： 太赫兹波(terahertz, THz, T-ray)是指频率介于0.1～10 THz之间的电磁辐射，在电磁波谱上位于微波和远红外线之间。大多数爆炸物、毒品在此波段有特征吸收。与在公共安全领域检测武器、爆炸物、毒品等危险品的传统方法相比，太赫兹辐射能量低，不会产生电离辐射，也不会引起安全担忧。而且，太赫兹波对于衣物等大多数包装材料有很强的穿透力，对物质的检测可以做到高灵敏、无损伤和远距离，因此在反恐、毒品、安全检测等方面具有显著潜在优势。文章介绍了国内外太赫兹时域光谱技术(terahertz time domain spectroscopy, THz-TDS)在爆炸物及毒品检测方面的研究最新进展；详细讨论了黑索金(RDX)的研究现状，并初步探讨了影响实验结果的几种因素。
关键词：太赫兹时域光谱;爆炸物;毒品;检测
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.
Key words：THz-TDS;Explosive;Illegal drug;Detection and identification
刘桂锋1,2,赵红卫1,葛敏1,2,王文锋1*. 太赫兹时域光谱技术在危险品检测方面的应用[J]. 光谱学与光谱分析, 2008, 28(05): 966-969.
LIU Gui-feng1,2,ZHAO Hong-wei1,GE Min1,2,WANG Wen-feng1*. Application of Terahertz Time Domain Spectroscopy to Explosive and Illegal Drug. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(05): 966-969.
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