Suppression of Cross Coupling in Plasmon Waveguides

Аннотация

Suppression of cross coupling between dielectric plasmon waveguides by inserting an additional waveguide between two main waveguides has been demonstrated. It has been found that the cross-sectional dimensions of the system can be less than two microns, i.e., several hundreds of times smaller than the cross-sectional dimensions of a system made with the use of a dielectric fiber. It has been determined that modes propagating in these waveguides are the sum of one of the symmetric modes and one antisymmetric mode of the coupled system, and the cross coupling is suppressed by matching the wave numbers of these modes. Analytical results are confirmed by numerical simulation.