metal-dielectric slab. This geometry results in very strong confinement of a quasi-TE fundamental mode and gives smaller propagation losses than a purely metallic slot waveguide.
Abstract
We study a metamaterial-based optical waveguide formed by a silica-filled slot in a layered metal-dielectric slab. This geometry results in very strong confinement of a quasi-TE fundamental mode and gives smaller propagation losses than a purely metallic slot waveguide.