title: Piezoelectric-induced polariton coupling in a superlattice.
abstract: Propagation of electromagnetic waves in a piezoelectric superlattice is studied. Because of the piezoelectric effect, a coupling between two orthogonally polarized electromagnetic waves is induced by the superlattice vibration. As a consequence of the strong coupling, two types of polariton modes are found: one is supported in the band gap while the other prohibited. This unusual coupling effect is not present in classical lattices.
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Cheng-ping
authors.initials: CP
authors.lastname: Huang
authors.forename: Yong-yuan
authors.initials: YY
authors.lastname: Zhu