Experimental verification of 'waveguide' plasmonics
Experimental verification of 'waveguide' plasmonics
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DOI：
10.1088/1367-2630/aa936c
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发表时间：
2017-12-06
影响因子：
3.3
通讯作者：
Silveirinha, Mario G.
中科院分区：
文献类型：
--
作者：
Prudencio, Filipa R.;Costa, Jorge R.;Silveirinha, Mario G.
表面等离子体激元是电子气的集体激发，发生在负极性和正极性介质之间的界面处。在这里，我们报告的实验观察，这样的表面波使用简单的波导超材料填充仅与可用的正向介质在微波频率。与光学设计相反，在我们的设置中，表面等离子体激元的传播长度可以相当长，因为选择了低损耗的常规介质以避免来自负介质的典型损耗。等离子体激元现象在增强光-物质相互作用、实现纳米光子电路和集成光子学等方面具有潜在的应用价值。
Surface plasmons polaritons are collective excitations of an electron gas that occur at an interface between negative-epsilon and positive-epsilon media. Here, we report the experimental observation of such surface waves using simple waveguide metamaterials filled only with available positive-epsilon media at microwave frequencies. In contrast to optical designs, in our setup the propagation length of the surface plasmons can be rather long as low loss conventional dielectrics are chosen to avoid typical losses from negative-epsilon media. Plasmonic phenomena have potential applications in enhancing light-matter interactions, implementing nanoscale photonic circuits and integrated photonics.