Fano-like Interference in Self-Assembled Plasmonic Quadrumer Clusters
Fano-like Interference in Self-Assembled Plasmonic Quadrumer Clusters
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DOI：
10.1021/nl1029732
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发表时间：
2010-11-01
期刊：
影响因子：
10.8
通讯作者：
Capasso, Federico
中科院分区：
文献类型：
--
作者：
Fan, Jonathan A.;Bao, Kui;Capasso, Federico
强相互作用的金属纳米颗粒的组装是等离子体纳米结构工程的基础。我们证明了四个相同的球形粒子自组装成一个紧密堆积的非对称四聚体的集群支持强Fano干扰。由于团簇中粒子之间的取向依赖性耦合，该特征对所保持的入射电的极化高度敏感。这种结构展示了自组装胶体系统的精心设计如何导致新的等离子体模式的产生以及等离子体系统中干涉效应的实现。
Assemblies of strongly interacting metallic nanoparticles are the basis for plasmonic nanostructure engineering. We demonstrate that clusters of four identical spherical particles self-assembled into a close-packed asymmetric quadrumer support strong Fano-like interference. This feature is highly sensitive to the polarization of the incident electric held due to orientation-dependent coupling between particles in the cluster. This structure demonstrates how careful design of self-assembled colloidal systems can lead to the creation of new plasmonic modes and the enabling of interference effects in plasmonic systems.