A Plasmonic Fano Switch
A Plasmonic Fano Switch
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DOI：
10.1021/nl302610v
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发表时间：
2012-09-01
期刊：
影响因子：
10.8
通讯作者：
Link, Stephan
中科院分区：
文献类型：
--
作者：
Chang, Wei-Shun;Lassiter, J. Britt;Link, Stephan
等离子簇可以支持 Fano 共振，其中： 线形状特征由簇几何形状控制。在这里，我们展示了具有半圆形中心盘的簇，该簇被紧密间隔的耦合纳米盘的圆环包围，对于正交入射偏振方向产生类法诺和非类法诺光谱。当这种结构被整合到独特的宽带液晶器件几何结构中时，整个法诺共振谱可以以电压依赖的方式打开和关闭。 Fano 类和非 Fano 类光谱之间的可逆转变是由相对较低（类似于 6 V）的施加电压引起的，从而导致透明窗口的完全开/关切换。
Plasmonic clusters can support Fano resonances, where the: line shape characteristics are controlled by cluster geometry. Here we show that clusters with a hemicircular central disk surrounded by a circular ring of closely spaced, coupled nanodisks yield Fano-like and non-Fano-like spectra for orthogonal incident polarization orientations. When this structure is incorporated into an uniquely broadband, liquid crystal device geometry, the entire Fano resonance spectrum can be switched on and off in a voltage-dependent manner. A reversible transition between the Fano-like and non-Fano-like spectra is induced by relatively low (similar to 6 V) applied voltages, resulting in a complete on/off switching of the transparency window.