Lamb waves in plates covered by a two-dimensional phononic film
Lamb waves in plates covered by a two-dimensional phononic film
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DOI：
10.1063/1.2431569
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发表时间：
2007-01-08
影响因子：
4
通讯作者：
Ganot, Francois
中科院分区：
文献类型：
--
作者：
Bonello, Bernard;Charles, Christine;Ganot, Francois
实验研究了Lamb波在二维声子薄膜覆盖的硅片中的传播。使用激光超声技术测量色散曲线。然后将数据与未涂覆的硅板的计算的色散曲线进行比较。的低阶对称和反对称兰姆模式的整体形状不改变薄的声子膜，除了出现在第一和第二布里渊区的边缘处的频带隙。实验研究了填充率对间隙大小的影响。(c)2007年，美国物理学会。
The propagation of Lamb waves in silicon plates coated by a very thin two-dimensional phononic film is studied experimentally. The dispersion curves are measured using a laser ultrasonics technique. The data are then compared to the calculated dispersion curves of the uncoated silicon plate. The overall shapes of the lower-order symmetric and antisymmetric Lamb modes are not altered by the thin phononic film, except by the appearing of frequency band gaps at the edges of both the first and the second Brillouin zone. The influence of the filling fraction on the magnitude of the gaps is investigated experimentally. (c) 2007 American Institute of Physics.