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arXiv 1408.2186cond-mat.mtrl-sciphysics.class-ph
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弹性异向介质上的类表面等离子体激元(SPP)声表面波

Surface-Plasmon-Polariton (SPP)-Like Acoustic Surface Waves on Elastic Metamaterials

Ke Deng, Zhaojian He, Yiqun Ding, Heping Zhao, Zhengyou Liu

摘要:

研究了弹性异向介质表面声表面波的色散特性。与分析方法,我们表明,非常规的声表面波,与金属表面上的电磁表面等离子体激元(SPPs)的色散行为非常相似,可以存在于弹性超材料的频率附近的弹性Lamé的常数满足λ + μ =0。以两种典型的弹性超材料为例,说明了这种特殊的声表面波。

英文摘要:

We investigate the dispersion properties of the acoustic surface waves on surface of elastic metamaterials. With an analytical approach, we show that unconventional acoustic surface waves, with dispersion behaviors very similar to the electromagnetic surface plasmon polaritons (SPPs) on metal surfaces, can exist on the elastic metamaterials around the frequency at which the elastic Lamé's constants satisfy lambda+mu=0. Two typical elastic metamaterials are exemplified to demonstrate such peculiar acoustic surface waves.

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