铜币形空气孔二维三角晶格光子晶体的完全光子带隙  

Complete Photonic Band Gaps of Two-Dimensional Triangular Lattice Photonic Crystals Based on Copper-Coin-Shaped Air Hole

作　　者：李传起[1] 范庆斌[1] 杨梦婕[1] 张秀容[1] 

机构地区：[1]广西师范大学电子工程学院,广西桂林541004

出　　处：《光子学报》2015年第6期57-62,共6页Acta Photonica Sinica

基　　金：广西高校自然科学基金重点项目(No.201202ZD010);桂林市科学研究与技术开发计划课题(No.20120104-18)资助

摘　　要：采用平面波展开法,研究铜币形空气孔二维三角晶格光子晶体的完全带隙随结构参量变化的规律.研究表明:铜币形散射子结合了空气孔型和介质柱型两种光子晶体的优点,有利于获得更宽的完全带隙.该光子晶体大完全带隙对由制备工艺上引起的材料掺杂和空气孔半径的偏离具有一定的稳定性.为了获得完全带隙,组成光子晶体的两种介质要有足够大的介电常数对比度,铜币形空气孔二维三角晶格光子晶体在ε=11.8时出现完全带隙.对参量分组优化发现,在ε=22.75,R=0.483μm,d=0.195μm,φ=90°,G=1.3时,完全带隙的宽度Δωa/2πc获得最大值0.136 1,带隙率为33.55%Plane wave expansion method has systematically studied the complete Photonic Band Gap （PBG） of copper-coin-shaped triangular lattice Photonic Crystal （PC）. The results demonstrate that the copper-coin-shaped scatterers is a combination of the air hole type and dielectric rod type of PCs, which in favor of obtain a wider complete PBG width. The width of the complete PBG has certain stability to deviation of doped material and the air hole radius caused by the preparation process. The two types of dielectric of which the PC are composed must have sufficiently large dielectric constant ratio to get the complete bandgap. The copper-coin-shaped triangular lattice PC begins to appear complete bandgap when the ε=11. 8. By grouping optimization of parameters, the widest complete PBG of △ωα/27πc is 0. 136 1 with △ω/ωmid of 33. 55% when ε is 22.75, R is 0. 483 μm, d is 0. 195 urn, φ is 90° and G is 1.3.

关 键 词：光子晶体 完全带隙 平面波展开法 带隙率 散射子 

分 类 号：O439[机械工程—光学工程]