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提出了一种新型的非对称性散射体的二维六角晶格光子晶体结构—–太极形介质柱光子晶体.利用平面波展开法从理论研究这种光子晶体结构的能带特性以及结构参数对完全禁带的影响.研究表明:散射体对称性的打破,TE模和TM模能带宽度和数目都会有所增加,有益于获得更宽的完全禁带以及更多条完全禁带.通过参数优化,发现在ε=17,R=0.38μm,r=0.36R,θ=0°时,获得最大完全带隙宽度0.0541(ωa/2πc);在ε=16,R=0.44,r=0.2R,θ=0°时,光子晶体完全带隙数目最多达到8条.
A new type of two-dimensional hexagonal lattice photonic crystal with asymmetric scatterers, named as the dielectric matrix photonic crystal in Tai Chi shape, is proposed. The energy band characteristics of the photonic crystal structure and the influence of structural parameters on the complete The research shows that the symmetry breaking of scatterers will increase the width and number of energy bands of TE mode and TM mode, which will be beneficial to obtain a wider band gap and more band gaps. By parameter optimization , The maximum full band gap 0.0541 (ωa / 2πc) was obtained for ε = 17, R = 0.38μm, r = 0.36R and θ = 0 °; r = 0.2R, When θ = 0 °, the total number of photonic crystal bandgaps reaches 8 at most.