New type of polariton in a piezoelectric superlattice.
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.
Zhu
Yong-yuan
YY
National Laboratory of Solid State Microstructures, Nanjing University, China. yyzhu@nju.edu.cn
Zhang
Xue-jin
XJ
Lu
Yan-qing
YQ
Chen
Yan-feng
YF
Zhu
Shi-ning
SN
Ming
Nai-ben
NB