title: New type of polariton in a piezoelectric superlattice.
abstract: We studied the propagation of an electromagnetic (EM) wave in a piezoelectric superlattice. Because of the piezoelectric effect, a transverse polarization can be induced by a longitudinal wave which couples strongly to the EM wave in some particular frequency regions, resulting in the creation of a new type of polariton that does not exist in ionic crystals. The forbidden band associated with the polariton is not due to the Bragg reflection, but rather to the coupling.
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University, China. yyzhu@nju.edu.cn
authors.forename: Yong-yuan
authors.initials: YY
authors.lastname: Zhu
authors.forename: Xue-jin
authors.initials: XJ
authors.lastname: Zhang
authors.forename: Yan-qing
authors.initials: YQ
authors.lastname: Lu
authors.forename: Yan-feng
authors.initials: YF
authors.lastname: Chen
authors.forename: Shi-ning
authors.initials: SN
authors.lastname: Zhu
authors.forename: Nai-ben
authors.initials: NB
authors.lastname: Ming