摘要
采用平面波展开法模拟计算了由空气背景中的介质柱构成的二维Kagome格子光子晶体的能带结构,得到了使完全光子禁带最大化的结构参量·计算结果表明:由圆形、正六边形和正四边形三种不同形状锗介质柱构成的Kagome格子光子晶体都出现了完全光子禁带,最大禁带分别为Δ=0.014(ωa/2πc)、Δ=0.013(ωa/2πc)、Δ=0.011(ωa/2πc)·发现由圆形和正六边形两种介质柱构成的Kagome格子光子晶体在填充比连续变化的较大的范围内都有宽度较为稳定的完全禁带,且它们具有非常相似的能带结构·
Plane wave expansion method was employed to simulate the bandgap of 2-D photonic crystals with Kagome lattice. The optimum structural parameters of photonic crystals with the largest complete bandgap were obtained. Complete bandgaps were obtained when the germanium columns were in the shape of circular, hexagonal and square, respectively. It is showed that the complete bandgaps can be attained steadily as the filling fraction is changed in a wide range for circular and hexagonal columns, and their band structures are similar.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2006年第5期724-728,共5页
Acta Photonica Sinica
基金
国家自然科学基金
TiAl基合金固体渗硅层的形成及抗氧化机理研究(批准号:50171046)资助项目
