We present a method to introduce several graphene sheets into the non-retarded Green’s function for a layered structure containing polar insulators, which support transverse optical phonon modes. Dispersion relations are derived to illustrate hybridization of Dirac plasmons in two graphene sheets with phonon modes in an oxide spacer layer between them.28th Summer School and International Symposium on the Physics of Ionized Gases - SPIG 2016, August 29 - September 2, 2016, Belgrad
