title: Power transfer between neighboring planar waveguides.
abstract: The ability to control light over very small distances is a problem of                     fundamental importance for a vast range of applications in communications,                     nanophotonics, and quantum information technologies. For this purpose, several                     methods have been proposed and demonstrated to confine and guide light, for                     example in dielectric and surface plasmon polariton (SPP) waveguides. Here, we                     study the interaction between different kinds of planar waveguides, which                     produces dramatic changes in the dispersion relation of the waveguide pair and                     even leads to mode suppression at small separations. This interaction also                     produces a transfer of power between the waveguides, which depends on the gap                     and propagation distances, thus providing a mechanism for optical signal                     transfer. We analytically study the properties of this interaction and the power                     transfer in different structures of interest including plasmonic and                     particle-array waveguides, for which we propose an experimental realization of                     these ideas.
authors.affiliation: Instituto de Óptica-CSIC and Unidad Asociada CSIC-Universidade de Vigo, Serrano 121, 28006 Madrid, Spain. xm.bendana@csic.es
authors.forename: X M
authors.initials: XM
authors.lastname: Bendaña
authors.forename: F J
authors.initials: FJ
authors.lastname: García de Abajo
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*