太赫兹波在二维正三角晶格金属光子晶体中的传输特性

运用频域有限元法研究了一种二维正三角晶格金属光子晶体在太赫兹波段的传输特性。该模型选取空气为背景材料,金属铜为介质柱。通过改变太赫兹波的入射方向、晶格常数和介质柱填充率,对TM模和TE模的传输特性进行了系统完整的分析,获得了太赫兹波在正三角晶格金属光子晶体中的传输规律。结果表明,传输特性随着介质柱填充率、晶格常数及太赫兹波入射方向的变化而变化,且TE模和TM模带隙差异很大,这为太赫兹波段的光子晶体滤波器、反射器和极化器的开发与制作提供了参考依据。

Transmission Characteristic of 2-D Regular Triangular Lattice Metallic Photonic Crystal in THz Range

Transmission characteristic of terahertz wave in two-dimensional regular triangular lattice metallic photonic crystal is analyzed and studied through frequency-domain finite element algorithm.Copper is chosen for dielectric cylinder,and the background material is air.By changing the incident direction of terahertz,lattice constant and the ratio of filling material,and combining with a thoroughly systematic analysis of the transmission properties of both the TM mode and TE mode,the transmission patterns of terahertz in metallic photonic crystal with regular triangular lattice are acquired.The research results indicate that the characteristics of transmission are related to the ratio of filling material,lattice constant and incident direction of terahertz,and the band gap ranges of TE mode and TM mode are also very different.These have provided theoretic foundation for the development and production of photonic crystal filter,reflector and E/H polarization in terahertz region.