Polariton in a Piezoeelctric Superlattice

Abstract

We studied the propagation of an electromagnetic wave in a piezoelectric superlattice. The coupling between vibrations of the superlattice (either transverse vibrations or longitudinal vibrations) and the electromagnetic waves results in various long-wavelength optical properties, such as microwave absorption, dielectric abnormality, and polariton excitation, that exist originally in ionic crystals. The results show that this artificial superlattice structure can be used to simulate the microscopic physical processes in real crystals.