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用平面波展开法对硅背景下的通信波段不同晶格类型和气孔形状光子晶体的能带结构进行数值计算与分析,提出了相应的物理模型.结果表明:利用光子受限效应和晶格对称性效应可以有效地调控光子带隙.随光子晶体填充率的增加,其约束光子的能力增强,光子带隙在一定范围内展宽且其中心频率蓝移;带隙随晶格对称性增加而变宽.对基元形状和旋转角度的研究发现,光子带隙随基元旋转角度变化具有周期性和对称性,表现出各向异性,由此优化出对应的不同晶格的最佳谐振腔型结构.
The plane wave expansion method is used to calculate and analyze the energy band structures of photonic crystal with different lattice types and stomatal shapes in the communication band of silicon, and the corresponding physical models are proposed. The results show that using the photon confinement effect and lattice symmetry Effect can effectively control the photonic band gap.With the increase of photonic crystal filling rate, its ability to confine photons is enhanced, the photonic bandgap broadens within a certain range and its center frequency is blue-shifted, and the bandgap broadens as the lattice symmetry increases The study of elementary shape and rotation angle shows that the photonic bandgap changes cyclically and symmetrically with the rotation angle of the elementary element and shows the anisotropy, thus optimizing the optimal cavity structure corresponding to different lattice .