Fano-like Interference in Self-Assembled Plasmonic Quadrumer Clusters

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 se...

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Veröffentlicht in:	Nano letters 2010-11, Vol.10 (11), p.4680-4685
Hauptverfasser:	Fan, Jonathan A, Bao, Kui, Wu, Chihhui, Bao, Jiming, Bardhan, Rizia, Halas, Naomi J, Manoharan, Vinothan N, Shvets, Gennady, Nordlander, Peter, Capasso, Federico
Format:	Artikel
Sprache:	eng
Schlagworte:	Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) Computer Simulation Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Dendrimers Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Light Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Materials science Materials Testing Methods of nanofabrication Models, Chemical Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nanostructures - chemistry Nanostructures - ultrastructure Physics Refractometry - methods Scattering, Radiation Self-assembly Surface and interface electron states Surface Plasmon Resonance - methods Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:	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.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl1029732