THz波与介质之间的相互作用及其在介质中的传输特性是THz技术研究领域内的基础问题, 是THz辐射探测、成像及无损探测等系统设计的重要依据。针对介质中THz波传输问题, 从电磁传输理论出发, 同时结合国内外相关文献中的实验结果报道, 利用系统分析的思想, 分别构建了THz波在均匀介质和理想缺陷介质中的传输模型, 并给出了相应的系统传输函数, 最后结合仿真实验, 对上述传输模型的有效性与合理性进行了验证和分析。仿真结果符合基本的物理规律, 且与实际观测现象具有较好的一致性, 因此所做工作及结论, 对于深化THz波与介质相互作用及传输机理的认识均具有一定的借鉴意义。

The relationship between THz wave and medium, as well as the transmission characteristics of THz wave are not only the basic topic in the THz technology research area, but also the critical evidence for the system designations of THz wave detection, imaging and non defective detection applications. As for the transmission problem of THz wave through medium, some models were constructed respectively for the homogenous medium and idea defective medium with the methods of system analysis, which was also motivated by the electromagnetic theory and some associated experimental results presented in some home and abroad literature references. The corresponding transmission functions were also deduced and presented. Finally, simulation experiments validated the effectiveness and reasonability of such models. The results follow the basic physical principles, and are consistent with the phenomenon observed in practical experiments. The conclusions made in this paper are meaningful for the deepened comprehension about the mechanism THz wave transmitting through medium.