PHONON-POLARITONS IN BILAYER SYSTEMS - S-POLARIZED GUIDED WAVE PHONON-POLARITONS

In a bilayer system consisting of two dielectric media with local, frequency dependent dielectric functions in addition to p-polarized phonon-polaritons, s-polarized phonon-polaritons can exist. These phonon-polaritons are associated with electromagnetic fields having standing wave character in one or in both layers in the direction normal to the surfaces. Therefore, they are guided wave phonon-polaritons. The regions in the omega -K// parallel plane where these phonon-polaritons can exist are discussed and their principle physical properties derived. The dispersion curves and the electric fields of the s-polarized guided wave phonon-polaritons are calculated and presented in graphical form. The results of the developed theory of p- and s-polarized polaritons in bilayer systems are discussed.