Journal
NANO LETTERS
Volume 11, Issue 9, Pages 3927-3934Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl202143j
Keywords
Surface plasmons; Fano resonances; metamaterials; optical magnetism
Categories
Funding
- Programa de perfeccionamiento de doctores y doctoras en el extranjero del Departamento de Educacion, Universidades e Investigacion del Gobierno Vasco
- Stanford Terman Fellowship
- Robert N. Noyce Family faculty
- AFOSR
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Assemblies of strongly coupled plasmonic nanoparticles can support highly tunable electric and magnetic resonances in the visible spectrum. In this Letter, we theoretically demonstrate Fano-like interference effects between the fields radiated by the electric and magnetic modes of symmetric nanoparticle trimers. Breaking the symmetry of the trimer system leads to a strong interaction between the modes. The near and far-field electromagnetic properties of the broken symmetry trimer are tunable across a large spectral range. We exploit this Fano-like effect to demonstrate spatial and temporal control of the localized electromagnetic hotspots in the plasmonic trimer.
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