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