Modal properties of novel hybrid plasmonic waveguide consisting of two identical dielectric nanotubes symmetrically placed on both sides of a thin metal film

摘要

A novel type of hybrid plasmonic waveguide consisting of two identical dielectric nanotubes symmetrically placed on both sides of a thin metal film is proposed. The propagation properties of the antisymmetric and symmetric modes are numerically analyzed at the telecommunication working wavelength. Theoretical investigations reveal that deep-subwavelength mode confinement as well as long-range propagation length can be achieved simultaneously. This structure could facilitate potential applications in long-range plasmon waveguiding and compact high-performance on-chip photonic components.