Recent theoretical works predicted a third possible condition for the super-Planckian heat transfer. On the surface of polar dielectrics, can exist evanescent electromagnetic waves produced by hybridization of photons and optical phonons. These wave are called surface phonon-polaritons (SPhPs). In suspended nanofilms, the SPhPs can carry the energy along the surface. Recent works even demonstrated how SPhPs can enhance the in-plane heat conduction of nanofilms. In this project, we aim to demonstrate that SPhPs can transfer thermal energy in different systems.