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首页> 外文期刊>Physical review >Dispersion of spoof surface plasmons in open-ended metallic hole arrays
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Dispersion of spoof surface plasmons in open-ended metallic hole arrays

机译：欺骗性表面等离子体激元在开放式金属孔阵列中的扩散

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Using phase sensitive microwave frequency measurements, we obtain the dispersion of spoof surface plasmon waves on a highly conducting sheet perforated with a two-dimensional array of subwavelength holes, and compare our results to an explicit analytical dispersion relation obtained by the modal matching method. We observe splitting into symmetric and antisymmetric surface modes, a behavior analogous to that of surface plasmons in thin metallic films at optical frequencies. We show that spoof surface modes play an important role in both near and far field transmissions. Specifically, we show that superfocussing effects which are present for surface plasmons in metallic films are absent for hole arrays (i.e., no amplification of near fields is possible for spoof surface plasmons). While many of the apparent properties of spoof surface plasmons resemble those of surface plasmons in thin metallic films, the analogy is therefore incomplete in the high frequency limit.
机译：使用相位敏感的微波频率测量，我们获得了在带有二维亚波长孔阵列的高导电片上的欺骗表面等离激元波的色散，并将我们的结果与通过模态匹配方法获得的显式解析色散关系进行了比较。我们观察到分裂成对称和反对称的表面模式，该行为类似于金属薄膜在光频率下的表面等离子体激元的行为。我们证明了欺骗表面模式在近场和远场传输中都起着重要作用。具体而言，我们表明，孔阵列不存在金属膜中的表面等离激元所存在的超聚焦效应（即，对于欺骗性表面等离激元而言不可能放大近场）。尽管欺骗性表面等离激元的许多表观特性类似于金属薄膜中的表面等离激元，但是在高频范围内，此类推论是不完整的。

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