Fano resonances in individual coherent plasmonic nanocavities

Niels Verellen, Yannick Sonnefraud, Heidar Sobhani, Feng Hao, Victor V. Moshehalkov, Pol Van Dorpe, Peter Nordlander, Stefan A. Maier

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104 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1663-1667
Number of pages5
JournalNano Letters
Volume9
Issue number4
DOIs
Publication statusPublished - 8 Apr 2009
Externally publishedYes

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