Fano resonances in individual coherent plasmonic nanocavities.
basic_science · Level V
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- Record sourced from PubMed, PMID 19281254.
- Also identified by DOI 10.1021/nl9001876.
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Abstract
We observe the appearance of Fano resonances in the optical response of plasmonic nanocavities due to the coherent coupling between their superradiant and subradiant plasmon modes. Two reduced-symmetry nanostructures probed via confocal spectroscopy, a dolmen-style slab arrangement and a ring/disk dimer, clearly exhibit the strong polarization and geometry dependence expected for this behavior at the individual nanostructure level, confirmed by full-field electrodynamic analysis of each structure. In each case, multiple Fano resonances occur as structure size is increased.