Symmetry breaking in plasmonic nanocavities: subradiant LSPR sensing and a tunable Fano resonance.
A metallic nanostructure consisting of a disk inside a thin ring supports superradiant and very narrow subradiant modes. Symmetry breaking in this structure enables a coupling between plasmon modes of differing multipolar order, resulting in a tunable Fano resonance. The LSPR sensitivities of the subradiant and Fano resonances are predicted to be among the largest yet for individual nanostructures.
Hao
Feng
F
Laboratory for Nanophotonics, Department of Physics and Astronomy, M.S. 61, Rice University, Houston, Texas 77005-1892, USA.
Sonnefraud
Yannick
Y
Van Dorpe
Pol
P
Maier
Stefan A
SA
Halas
Naomi J
NJ
Nordlander
Peter
P
D006863:Hydrogen-Ion Concentration; D049329:Nanostructures / Q000737:chemistry*; D012834:Silver / Q000737:chemistry; D020349:Surface Plasmon Resonance / Q000379:methods*
D012834:Silver