title: Channel plasmon-polaritons: modal shape, dispersion, and losses.
abstract: We theoretically study channel plasmon-polaritons (CPPs) with a geometry similar to that in recent experiments at telecommunication wavelengths [Bozhevolnyi et al., Nature 440, 508 (2006)]. The CPP modal shape, dispersion relation, and losses are simulated by using the multiple multipole method and the finite difference time domain technique. It is shown that, with an increase of the wavelength, the fundamental CPP mode shifts progressively toward the groove opening, ceasing to be guided at the groove bottom and becoming hybridized with wedge plasmon-polaritons running along the groove edges.
authors.affiliation: Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain.
authors.forename: Esteban
authors.initials: E
authors.lastname: Moreno
authors.forename: F J
authors.initials: FJ
authors.lastname: Garcia-Vidal
authors.forename: Sergio G
authors.initials: SG
authors.lastname: Rodrigo
authors.forename: L
authors.initials: L
authors.lastname: Martin-Moreno
authors.forename: Sergey I
authors.initials: SI
authors.lastname: Bozhevolnyi