Guided modes in negative-refractive-index fibres

Abstract

We consider propagation of electromagnetic waves in a circular fibre with a
\ncore of negative-refractive-index metamaterial. We study the fast and slow
\nguided modes of a dispersive fibre and the mode properties depending on the
\nfibre parameters. We show the peculiar mode properties of a fibre with
\nsimultaneously negative dielectric permittivity and magnetic permeability of
\nthe core: the perfect phase matching of the TE and TM slow modes, sign-varying energy flux, and the existence of TEM modes.