Journal
NANO LETTERS
Volume 9, Issue 4, Pages 1663-1667Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl9001876
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Funding
- EPSRC [EP/D063329/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D063329/1] Funding Source: researchfish
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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.
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