  It is demonstrated that an isotropic left-handed medium can be constructed as
a photonic structure consisting of two dielectric materials, one with positive
and another with negative dielectric permittivities epsilon. Electromagnetic
waves supported by this structure are the surface waves localized at the
dielectric interfaces. These surface waves can be either surface phonons or
surface plasmons. Two examples of negative epsilon materials are used: silicon
carbide and free-electron gas.
