New type of polariton in a piezoelectric superlattice

被引:57
|
作者
Zhu, YY [1 ]
Zhang, XJ [1 ]
Lu, YQ [1 ]
Chen, YF [1 ]
Zhu, SN [1 ]
Ming, NB [1 ]
机构
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
关键词
D O I
10.1103/PhysRevLett.90.053903
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
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页数:4
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