摘要
为了研究太赫兹波在2维正方晶格光子晶体中的传播特性,利用平面波展开法数值模拟了光子晶体能带结构和态密度分布。计算表明,E偏振当填充率f=0.6362和H偏振当填充率f=0.7845时出现最大光子带隙,在f=0.7791出现最大完全光子带隙;增加介电常数的差值,也增加了太赫兹波在正方晶格光子晶体中传输的带隙;光子晶体态密度的分布验证了存在光子带隙的范围。研究结果为太赫兹波器件的开发提供了理论依据。
In order to study the propagation characteristics of two-dimension square lattice photonic crystal in THz rang, the band gap structure and density of photon states were calculated by plane-wave expansion method. It was found that the maximum photonic band gap generated when the f was 0. 6362 and 0. 7854 in the E and H polarization, and the maximum absolute photonie band gap generated when the f= 0.7791 ;and large photonie band gap would generate by increasing difference inralue of dielectric constant;the photonic band structure was also shown by the photonic density of states. It turned out that this research provides theoretic basis for the development of THz devices.
出处
《激光技术》
CAS
CSCD
北大核心
2009年第1期36-38,共3页
Laser Technology
基金
山东省教育厅2007年度科研发基金资助项目(J07W105)
关键词
激光技术
太赫兹波
平面波展开法
正方晶格
光子带隙结构
光子晶体态密度
laser technique
THz wave
plane-wave expansion method
square lattice
photonic band structure
photon density of states