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采用平面波展开法模拟计算了由锗圆柱构成的Graphite格子二维光子晶体的带隙结构,发现由空气背景中的介质柱构成的二维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。
The bandgap structure of Graphite lattice 2D photonic crystal composed of germanium cylinder was simulated by the plane wave expansion method. It was found that the photonic band gap of the two-dimensional Graphite lattice structure composed of dielectric column in the air background has a complete photonic bandgap, Structural parameters that maximize complete bandgap. The numerical results show that the two-dimensional photonic crystal of Graphite structure has a complete bandgap within a wide range of filling ratio from f = 0.058 to f = 0.605, and Δ = 0.053 (ωa / 2πc) in the low energy region Large band gap.