针对爆炸物及其相关成分的感测科学和技术对于国土安全和国家防御有着至关重要的地位，对单质炸药环三亚甲基三硝胺（RDX）进行了太赫兹（THz）谱的实验测量和理论分析。利用太赫兹时域光谱技术（THz-TDS）给出了这些炸药样品在0.2THz～2.5THz范围内的折射率和吸收系数。利用密度泛函理论进行的理论模拟与实验结果符合较好。结果发现，单质炸药RDX具有特征吸收峰，利用THz-TDS技术可以对单质炸药进行检测和识别。

Experimental and theoretical investigations on the vibration spectrum of Cyclotrimethylene-trinitramine（RDX） in the region of 0.2～2.5 terahertz are presented. The refractive index and absorption coefficient of an explosive sample were measured by terahertz time-domain spectroscopy. The theoretical simulation according to density functional theory (DFT) is in agreement with the experimental data. The obtained results indicate that the single chemical compound explosive RDX has a characteristic absorption peak, and the single chemical compound explosive can be tested and identified with THz-TDS technology.