摘要
采用平面波展开法研究了由锗圆柱构成的Triangular格子、Kagome格子和Graphite格子二维光子晶体的带隙结构,发现Kagome格子和Graphite格子结构的光子晶体具有完全光子带隙,并得到了使完全带隙最大化的结构参数。数值计算结果表明,Graphite结构二维光子晶体在填充比从f=0.058到f=0.605连续变化的很大范围内都有完全带隙出现,在低能区出现了Δ=0.053(ωa/2πc)的较大带隙。为二维光子晶体材料的制备和应用提供理论依据。为二维光子晶体材料的制备和应用提供理论依据。
Plane wave expansion method was adopted to calculate the bandgap of 2-D photonic crystals with triangular lattice,kagome lattice and graphite lattice.The structural parameters of photonic crystals with the largest complete bandgap were obtained by optimization calculation.Complete bandgap for graphite lattice appeaed when filling ratio changed in a wide range,and the maximum width of complete bandgap was Δ=0.053 in the low-energy region.
出处
《太原理工大学学报》
CAS
北大核心
2011年第3期297-300,304,共5页
Journal of Taiyuan University of Technology
基金
山西省留学人员重大资助项目(2009-03)
山西省留学人员资助项目(2009-37)
关键词
光子晶体
光子带隙
平面波展开法
对称性
填充比
photonic crystals
photonic bandgap
plane wave expansion method
symmetry
filling ratio
