【摘要】 用平面波展开方法及时域有限差分法计算了各向异性介质材料碲形成的椭圆柱光子晶体的带隙结构 .计算表明 ,选取适当的椭圆长短轴以及晶格常数可以形成约 0 .0 5 1ωe(ωe=2πc Ly,Ly 为沿长轴的晶格常数 )的大带隙 ,而且在高能区域也出现了一个小的禁带 .分析表明 ,该光子晶体大禁带对工艺上可能引起的轴长及晶格常数的偏离具有很好的稳定性 .更多还原

【Abstract】 Two different methods (plane wave expansion method and the finite differential of time domain method) are employed to calculate the complete band gap of a two-dimensional photonic crystal consisting of anisotropic elliptic cylinders of Tellurium. After choosing appropriately the axes of the elliptic cylinders and the lattice constants, a very large complete band gap (about 0.051ω e, where ω e=2πc/L y, L y is the lattice constant along the long axis of the elliptic cylinders). This large complete band gap of the photonic crystal is very stable under the perturbation of the optimally designed parameters.更多还原