| 爆炸性物质的太赫兹(THz)光谱分析 |
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| 引用本文： | 石小溪,赵国忠.爆炸性物质的太赫兹(THz)光谱分析[J].现代科学仪器,2006,16(2):48-50. |
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| 作者姓名： | 石小溪 赵国忠 |
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| 作者单位： | 首都师范大学物理系,北京,100037 |
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| 基金项目： | 中国科学院资助项目;北京市教委科技发展计划项目 |
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| 摘 要： | 介绍了利用自由空间电光取样方法对爆炸性物质进行太赫兹（THz）频段的时间分辨光谱测量.得到了四种爆炸性材料的透射光谱,得出了它们在THz频段的光学特性.DNT（2,4-二硝基甲苯）在此频段有特征吸收峰,经过钝化的RDX（黑索今）在0.6-0.9THz之间吸收明显增强;而HMX（奥克托金）和TNT（2,4,6-三硝基甲苯）磷状结晶片对THz波的吸收较小,在0.4-1.2THz的频率范围内折射率不随频率发生显著改变.研究这四种常见的爆炸物特征谱线及在THz波段的光学参数,对于建立爆炸物材料THz波段指纹谱数据库和检测环境中危险物质,排除安全隐患具有重要意义.
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| 关 键 词： | 太赫兹 爆炸性物质 电光取样 时域光谱 |
| 收稿时间： | 2006/3/27 |
| 修稿时间： | 2006年3月27日 |
Analysis of Time-Resolved Terahertz Spectroscopy of Explosives |
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| Shi XiaoXi,Zhao GuoZhong.Analysis of Time-Resolved Terahertz Spectroscopy of Explosives[J].Modern Scientific Instruments,2006,16(2):48-50. |
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| Authors: | Shi XiaoXi Zhao GuoZhong |
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| Abstract: | The time-resolved measurement in terahertz(THz) frequency region by means of the free-space electro-optic sampling(FSEOS) was presented.The transmission spectra and complex refractive index of four kinds of explosives were obtained.The absorption coefficients of HMX and TNT are almost constant within the frequency range of 0 and 1.2THz,which is below 5cm-1.The value of the absorption coefficient of RDX between 0.6THz and 0.9THz is much larger than the one within other frequency range.In addition,the absorption of DNT increases above 0.9THz.Therefore,time-resolved terahertz spectroscopy can be applied to detect and identify explosives. |
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| Keywords: | Terahertz explosives electro-optic sampling time-domain spectroscopy |
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