Band structures of one-dimensional subwavelength photonic crystals containing metamaterials.
Band structures of one-dimensional subwavelength photonic crystals containing metamaterials.
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DOI：
10.1103/physreve.75.046601
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
Y. Weng;Zhi-guo Wang;Hong Chen
中科院分区：
文献类型：
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作者：
Y. Weng;Zhi-guo Wang;Hong Chen
研究了一维光子晶体在亚波长极限下的能带结构。当超材料包含在PC中时，会出现一个边缘对应于零（体积）平均介电常数（epsilon=0）和零（体积）平均磁导率（micro=0）的“空间平均单负”（SASN）间隙。与Bragg隙不同，SASN隙的频率范围不受几何尺度的影响，对入射角和无序不敏感。在亚波长极限下，左手型一维PC中的零n隙和单负型一维PC中的零有效相位隙都可以理解为SASN隙。当亚波长条件不满足时，零氮隙和零有效相位隙的作用开始不同。
We study the band structures of one-dimensional (1D) photonic crystals (PCs) in the subwavelength limit. A "spatial-averaged single-negative" (SASN) gap whose edges correspond to zero (volume) averaged permittivity (epsilon=0) and zero (volume) averaged permeability (micro=0) will appear when metamaterial is included in the PC. Unlike the Bragg gap, the frequency range of the SASN gap is invariant to the geometrical scaling and insensitive to the incident angle and disorder. In the subwavelength limit, both the zero-n gap in the left-handed 1D PC and the zero-effective-phase gap in the single-negative 1D PC can be understood as SASN gaps. When the subwavelength condition is not fulfilled, the zero-n gap and zero-effective-phase gap begin to act differently.