Plasmon Polaritons of the TE and TM Types in a Metal Film Bordering a Superlattice. II: Analysis of the Existence of Plasmon Polaritons

The maximum possible number of TE- and TM-polarized surface plasmon polaritons in the forbidden band of the Bloch spectrum of electromagnetic waves of a periodic superlattice in structures containing a metal film between a homogeneous medium and a periodic superlattice or between two superlattices has been established. It is shown that the key role in determining the maximum number of these waves is played by the type of the frequency dependence of the superlattice impedance. In addition, the maximum number of solutions of surface plasmon polaritons depends on the structure type and the wave polarization.