Coupled edge plasmon modes of metal/dielectric multi-wedges

Coupled edge plasmon modes of metal/dielectric multi-wedges
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金属/电介质多楔子的耦合边缘等离子体模式

DOI:
10.1088/1674-1056/22/6/067303
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发表时间:
2013-06
期刊:
影响因子:
1.7
通讯作者:
Wang Xuan-Zhang
Wang Xuan-Zhang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Wang Xuan-Zhang

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提出了一种金属/介质多楔模型来研究耦合边缘等离子体激元模(CEPM),其中所有的楔都有一个共同的边缘,波沿着边缘方向传播.提出了一种适用于许多实际结构的通用理论方法。得到了这些结构中CEPM的解析色散关系,并结合数值结果和色散关系讨论了CEPM的特性。对于本文中提到的所有结构,我们发现含有偶数个金属楔的结构有四个CEPM,而含有奇数个金属楔的结构有两个CEPM。此外,包含任何奇数个周期和任何偶数个周期的周期结构分别具有它们共同的CEPM。
We present a metallic/dielectric multi-wedge model to investigate the coupled edge plasmon modes (CEPMs), where all wedges have a common edge and the wave propagates along the edge direction. A general theoretical method valid to many practical structures is presented. The analytical dispersion relations of CEPMs in these structures are obtained and the CEPM properties are discussed with numerical results and the dispersion relations. For all structures mentioned in this paper, we find that the structures containing an even number of metallic wedges have four CEPMs and those with an odd-number of metallic wedges have two CEPMs. Further, the periodic structures containing any odd number of periods and any even number of periods possess their common CEPMs, respectively.
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