title: Suppression of radiative losses of surface polaritons on nanostructured thin metal films.
abstract: The strong electromagnetic coupling between surface plasmon polariton modes on opposite interfaces of a finite thickness periodically nanostructured metal film has been studied. Surface polariton dispersion and associated electromagnetic field distributions have been analyzed. It was shown that at a frequency that corresponds to the crossing of film Bloch modes of different symmetries, the radiative losses of surface polaritons that are related to the polaritons' coupling to light during propagation on the structured surface are suppressed.
authors.affiliation: Laboratoire de Physique de l'Université de Bourgogne, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5027, BP 47870, 21078 Dijon Cedex, France.
authors.forename: Davy
authors.initials: D
authors.lastname: Gérard
authors.forename: Laurent
authors.initials: L
authors.lastname: Salomon
authors.forename: Frédérique
authors.initials: F
authors.lastname: de Fornel
authors.forename: Anatoly V
authors.initials: AV
authors.lastname: Zayats