摘要
利用降低光子晶体的对称性来提高绝对禁带宽度,在长方网格边上加正方介质柱而构成像素型长方晶格二维光子晶体,用快速平面波展开法计算其能带结构,通过参数优化,在低频区找到最大绝对禁带宽度Δω=0.119ωe(ωe=2πc/a,a为晶格常数,c为光速),绝对禁带中心频率ωm id=0.829ωe,△ω/ωm id=14.4%。
The rectangle lattice 2D photonic crystal is formed by rectangle grid of dielectric veins and discretesquare dielectric rods. The modified plane - wave expansion method for calculating quickly the band structure is used to study the band structure. By optimizing parameters, an absolute band gap △ω =0. 119ωe（ where ωe =2πc/a, a is the lattice constant, c is light speed） is found at a low frequency field, whose mid - frequency ωmid is 0.829ωe, and △ω/△ωmid is 14.4%.
出处
《台州学院学报》
2007年第3期49-52,共4页
Journal of Taizhou University
关键词
光子晶体
长方晶格
快速平面波展开法
大带隙
Photonic Crystal
Rectangle Lattice
Modified Plane- wave Expansion Method
Large Absolute Band Gap
