摘要
用平面波展开法研究了太赫兹(THz)波在二维三角晶格光子晶体中的传输特性。数值计算了以硅为背景的空气圆柱构成的二维三角晶格光子晶体的能带结构和态密度,计算表明在介质圆柱半径r=0.47a(a为空气介质柱的晶格常数)出现最大完全光子带隙,带隙宽度为0.0701THz;当r=0.49a和r=0.45a时,E偏振和H偏振分别出现最大光子带隙,带隙宽度分别0.1022,0.1923THz。光子晶体能态密度的分布也表明了存在光子带隙的范围。研究结果为THz器件的开发提供了理论依据。
Propagation characteristic of two-dimensional triangular lattice photonic crystals in THz range was studied by using PWM. The band gap structure and density of photon states of two-dimensional triangular lattice photonic crystals constructed from air in Si dielectric matrix was calculated. It was found that when the radius was 0.47a, it can generate maximum absolute photonic band gap with 0. 070 1 THz, and it can generate maximum photonic band gap with 0. 102 2 and 0. 192 3 THz when the radius was 0.49a and 0.45a, respectively. The photonic band structure was also shown by the photonic density of states. This research provides a theoretic basis for the development of THz devices.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2009年第1期35-39,共5页
Chinese Journal of Luminescence
基金
山东省教育厅2007年度科研发展计划(J07WI05)
山东省科技厅2007年科技项目(2007GG3004005)资助项目
关键词
太赫兹波
光子晶体
平面波展开法
三角晶格
THz wave
photonic crystal
plan wave expansion method
triangular lattice
