压电体超晶格中的新型极化激元

New type of polariton in a piezoelectric superlattice

摘要: 对压电体超晶格中电磁波的传播情况进行了研究. 通过压电效应，压电体超晶格中的纵振动声波将引起横向电极化，这一极化会与某一特定波段的电磁波强烈耦合，从而出现通常离子晶体中所没有的新型极化激元，产生非布拉格反射引起的光学禁带.
- 超晶格 /
- 极化激元 /
- 光子晶体 /
- 声子晶体 /
- 压电效应
Abstract: We have 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 Bragg reflection, but rather to the coupling.
- superlattice /
- polariton /
- photonic crystal /
- phononic crystal /
- piezoelectric effect

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