Phonon Mode Conversion at Planar Interfaces in Crystalline Solids. Harmonic and Anharmonic Interface Potentials
A generalized model of a solid-solid interface is built. The model takes into account additional surface mass densities on both sides of the interface and an anisotropic and/or anharmonic coupling potential. The resonances due to the potential (up to three) manifest themselves by minima (zeros) of transmition and/or extrema in reflected and transmitted waves of different polarization depending on physical properties of the media and of the geometry.
Ludwik Dobrzynski and Krystyna Perzynska
D. Twaróg et al., "Phonon Mode Conversion at Planar Interfaces in Crystalline Solids. Harmonic and Anharmonic Interface Potentials ", Solid State Phenomena, Vol. 112, pp. 109-116, 2006