Defect modes merging in one-dimensional photonic crystals with multiple single-negative material defects

Defect modes merging in one-dimensional photonic crystals with multiple single-negative material defects
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具有多个单负材料缺陷的一维光子晶体中的缺陷模式合并

DOI:
10.1063/1.2832661
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发表时间:
2008-01
影响因子:
4
通讯作者:
Chen, Yihang
Chen, Yihang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chen, Yihang

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在由单负(介电常数或磁导率负)材料周期性层和多个单负缺陷层组成的一维光子晶体中,发现双缺陷模式相互融合。通过增加缺陷的大小或数量,两个缺陷模都接近禁带隙的中间,然后在光子结构变为虚无时合并。此外,可以将带隙中心频率处的电场设计为强局域化在低透射率光子晶体缺陷层和周期层之间的一个界面上。
Twin defect modes are found to merge into each other in one-dimensional photonic crystals consisting of periodic layers of single-negative (permittivity- or permeability-negative) materials and multiple single-negative defect layers. By increasing the size or the number of the defects, the two defect modes both approach to the middle of the forbidden band gap, then merge when the photonic structure becomes nihility. In addition, the electric fields at the central frequency of the band gap could be designed to be strongly localized at just one interface between the defect layers and the periodic layers of the photonic crystal with low transmission.
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