Confined plasmonic modes in a nanocavity
  The effect of confinement on surface plasmon polariton in a planar nanocavity was studied. The generalized modes were obtained and studied in detail. It was demonstrated that these modes result from the strong coupling of plasmon-like and photon-like modes. 
Aurore Castani\'e and Didier Felbacq
cond-mat.mtrl-sci physics.optics