Subwavelength lateral confinement of microwave surface waves
Subwavelength lateral confinement of microwave surface waves
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DOI：
10.1063/1.3622646
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发表时间：
2011-08
影响因子：
4
通讯作者：
E. M. Brock;E. Hendry;A. Hibbins
中科院分区：
文献类型：
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作者：
E. M. Brock;E. Hendry;A. Hibbins
呈现了最近由Cano等人[Opt.Express 18（2），754，（2010）]提出的“多米诺等离子体激元”的实验验证。使用微波，它表明，这种模式传播沿着金属长方体（“多米诺骨牌”）的周期性链和分散的模式被确定与分析和数值模型的预测结果进行比较。这种模式被发现是令人惊讶的链的横向宽度不敏感，即使在亚波长尺度。有这样的严格限制，“多米诺等离子体激元”显示出相当大的希望一维亚波长的电磁场的引导和聚焦。
Experimental verification of the “domino plasmon,” recently proposed by Cano et al. [Opt. Express 18(2), 754, (2010)] is presented. Using microwaves, it is demonstrated that this mode propagates along a periodic chain of metallic cuboids (“dominos”) and the dispersion of the mode is determined with results being compared to the predictions of analytical and numerical models. This mode is found to be surprisingly insensitive to the lateral width of the chain, even on a subwavelength scale. Having such tight confinement, “domino plasmons” show considerable promise for one-dimensional subwavelength guiding and focusing of electromagnetic fields.