Effects of symmetry breaking of scatterers on photonic band gap in hexangular-lattice photonic crystal

Effects of symmetry breaking of scatterers on photonic band gap in hexangular-lattice photonic crystal
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散射体对称性破缺对六角晶格光子晶体光子带隙的影响

DOI:
10.1016/j.optcom.2013.04.004
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发表时间:
2013-08
影响因子:
2.4
通讯作者:
Shu-Jing Li
Shu-Jing Li
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Xing-Dao He;Shen Juan-Juan;Bin Liu;Shu-Jing Li

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研究了散射体对称性对六角晶格光子晶体带隙的影响。与5种不同对称散射体的光子晶体的带隙相比,散射体对称性破缺后,E偏振和H偏振光子带隙的数目明显增加,从而增加了E偏振和H偏振光子带隙重合形成绝对光子带隙的可能性。对于最大绝对光子带隙,E偏振光子带隙随散射体对称性破缺而发生红移,而H偏振光子带隙则相反。因此,它们的重叠也随着散射体对称性的破坏而增加。另外,通过优化散射体参数(ε,R,r,θ),我们得到了尽可能多的绝对光子带隙数目和宽度。
We study the influence of scatterers symmetry on the photonic band gap based on hexangular-lattice photonic crystal. In comparison with the band gap of photonic crystal with five types of different symmetrical scatterers, the number of PBGs of E- and H-polarization obviously increase with breaking the symmetry of scatterers, so that increases the possibility of coinciding with PBGs of E- and H-polarization to form absolute PBGs. For largest absolute PBG, the PBG of E-polarization exhibits red shift with breaking the symmetry of scatterers, but the H-polarization is just the reverse. So their overlap also increases with the breaking the symmetry of scatterers. In addition, by optimizing the parameters (ε, R, r, and θ) of scatterer, we attain number and width of absolute PBG as much as possible.
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