title: Fano resonances in individual coherent plasmonic nanocavities.
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.
authors.affiliation: IMEC, Leuven, Belgium.
authors.forename: Niels
authors.initials: N
authors.lastname: Verellen
authors.forename: Yannick
authors.initials: Y
authors.lastname: Sonnefraud
authors.forename: Heidar
authors.initials: H
authors.lastname: Sobhani
authors.forename: Feng
authors.initials: F
authors.lastname: Hao
authors.forename: Victor V
authors.initials: VV
authors.lastname: Moshchalkov
authors.forename: Pol
authors.initials: P
authors.lastname: Van Dorpe
authors.forename: Peter
authors.initials: P
authors.lastname: Nordlander
authors.forename: Stefan A
authors.initials: SA
authors.lastname: Maier