Fano-like Interference in Self-Assembled Plasmonic Quadrumer Clusters

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• 作者：Jonathan A. Fan ; Kui Bao ; Chihhui Wu ; Jiming Bao ; Rizia Bardhan ; Naomi J. Halas ; Vinothan N. Manoharan ; Gennady Shvets ; Peter Nordlander ; Federico Capasso
• 刊名：Nano Letters
• 出版年：2010
• 出版时间：November 10, 2010
• 年：2010
• 卷：10
• 期：11
• 页码：4680-4685
• 全文大小：368K
• 年卷期：v.10,no.11(November 10, 2010)
• ISSN：1530-6992

文摘

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 field 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.

Keywords:

Fano resonance, plasmon, coupling, self-assembly, nanoshell, nanocluster