Tunable two types of Fano resonances in metal–dielectric core–shell nanoparticle clusters
Tunable two types of Fano resonances in metal–dielectric core–shell nanoparticle clusters
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DOI：
10.1063/1.4821187
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发表时间：
2013-09
影响因子：
4
通讯作者：
Zhongjian Yang;Ququan Wang;Hai-Qing Lin
中科院分区：
文献类型：
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作者：
Zhongjian Yang;Ququan Wang;Hai-Qing Lin
我们证明了两种类型的Fano共振可以观察到在金属-介电核-壳纳米粒子七聚体集群。第一类Fano共振是由电偶极等离子体激元模之间的耦合引起的。它仍然保持高折射率的外壳，即使金属芯被他们分开。第二种是由介质壳散射电磁模与修正等离子体激元模的干涉引起的。这些Fano共振的能量和线形是高度可调的壳指数和粒子的几何形状，这可能会发现在纳米光子学的应用。
We demonstrate that two types of Fano resonances could be observed in metal–dielectric core–shell nanoparticle heptamer clusters. The first kind of Fano resonance is caused by the coupling between electric dipolar plasmon modes. It still remains with high refractive index shells even though metal cores are separated by them. The second one is caused by the interference between scattering electromagnetic modes of dielectric shell and modified plasmon modes. The energy and line shape of these Fano resonances are highly tunable with shell index and particle geometry, which could find applications in nanophotonics.