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为了得到光子晶体太赫兹波段的传输特性,研究了晶体材料和晶体类型两个主要因素对传输特性的影响。利用MATLAB程序分别优化计算得到宽禁带和窄禁带光子晶体材料的最大完全带隙以及不同晶格结构和最大完全带隙之间的关系。对于相同晶格结构,带隙随介电常数比增大,对于不同晶格结构,三角晶格形成的最大带隙最大,最后根据太赫兹波的性质设计了太赫兹传输器件。研究结果为太赫兹波器件的开发提供了理论依据。
In order to obtain the transmission characteristics of photonic crystal terahertz band, the influence of the two main factors of crystal material and crystal type on the transmission characteristics was studied. The maximum complete bandgap of wide bandgap and narrow bandgap photonic crystal materials and the relationship between different crystal lattice structures and the maximum complete bandgap are respectively optimized and calculated by MATLAB program. For the same lattice structure, the bandgap increases with the dielectric constant ratio, and the maximum band gap formed by the triangular lattice is the largest for different lattice structures. Finally, the terahertz transmission device is designed according to the characteristics of the terahertz wave. The results provide a theoretical basis for the development of terahertz wave devices.