Surface polaritons at the interface between a polarized Dirac vacuum and a normal metal

The behavior of surface polaritons that can propagate along a flat interface between a polarized Dirac vacuum and a normal metal is studied. Dispersion relations for the surface wave are derived for different field polarizations, and the frequency domains where this wave may exist are found. It is shown that a constant electric field polarizing a Dirac vacuum can be determined from experiments on surface wave excitation.