二维声子晶体中导波弹性波的传播
Propagation of guided elastic waves in 2D phononic crystals.
作者信息
Charles C, Bonello B, Ganot F
机构信息
Institut des NanoSciences de Paris, CNRS (UMR 7588), Universités Pierre et Marie Curie et Denis Diderot, 140 rue de Lourmel, 75015 Paris, France.
出版信息
Ultrasonics. 2006 Dec 22;44 Suppl 1:e1209-13. doi: 10.1016/j.ultras.2006.05.096. Epub 2006 Jun 6.
The phononic band structure of two-dimensional phononic guides is numerically studied. A plane wave expansion method is used to calculate the dispersion relations of guided elastic waves in these periodic media, including 2D phononic plates and thin layered periodic arrangements. We show that, for any guided elastic wave, Lamb or generalised Lamb modes, stop bands appear in the dispersion curves, displaying a phononic band structure in both cases.
对二维声子波导的声子能带结构进行了数值研究。采用平面波展开法计算了这些周期性介质中导波弹性波的色散关系，包括二维声子板和薄层周期性排列。我们表明，对于任何导波弹性波，即兰姆波或广义兰姆模，在色散曲线中都会出现禁带，在这两种情况下都显示出声子能带结构。
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