Amplification and generation of surface plasmon polaritons in a dielectric-HTS film-dielectric structure

Propagation of surface polaritons in the dielectric-HTS-dielectric structure is investigated in the temperature region of T < T (c)/2, where the structure can be considered nonabsorbing. It is shown that in the region where the polariton wave is appreciably slowed down it can effectively interact with a flux of charged particles and be amplified due to the energy transfer from the drift current wave. It is also shown that a periodic substrate can cause generation of the surface polariton wave in the structure.