Plasmon polaritons of the TE and TM types in a metal film bordering a superlattice. III. Plasmon polaritons in bilayer superlattices

The paper theoretically investigates TE and TM polarized surface plasmon polaritons in a metal film in contact with a semi-infinite periodic superlattice formed by alternating layers of two materials. It is shown that in a certain case, the frequency dependence of the impedances of such a bilayer superlattice can be of only two types out of three possible types of dependencies. The dispersion curves TE and TM of surface plasmon polaritons in a silver film have been calculated for a number of structures consisting of various combinations of bilayer superlattices containing layers of quartz and titanium oxide. The calculation results are compared with the conclusions of the general theory on the maximum number of surface plasmon polaritons. The effect of the absorption of electromagnetic waves in the film on the characteristics of surface plasmon polaritons is analyzed.