Evidence for complete surface wave band gap in a piezoelectric phononic crystal
Evidence for complete surface wave band gap in a piezoelectric phononic crystal
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DOI：
10.1103/physreve.73.065601
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发表时间：
2006-06-01
影响因子：
2.4
通讯作者：
Laude, V.
中科院分区：
文献类型：
--
作者：
Benchabane, S.;Khelif, A.;Laude, V.
在实验上发现了一个完全的表面声波带隙，在二维正方晶格压电声子晶体中蚀刻在锂的氧化物。声子晶体中的传播研究直接产生和检测的表面波使用叉指换能器。完整的带隙从203 MHz扩展到226 MHz，与理论预测吻合良好。在完整带隙的上边缘附近，观察到对衬底的大部分的辐射占主导地位。这一现象可以通过引入声线的概念来解释。
A complete surface acoustic wave band gap is found experimentally in a two-dimensional square-lattice piezoelectric phononic crystal etched in lithium niobate. Propagation in the phononic crystal is studied by direct generation and detection of surface waves using interdigital transducers. The complete band gap extends from 203 to 226 MHz, in good agreement with theoretical predictions. Near the upper edge of the complete band gap, it is observed that radiation to the bulk of the substrate dominates. This observation is explained by introducing the concept of the sound line.