Guiding acoustic waves with graded phononic crystals

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• 作者：Zhaojian He ; Feiyan Cai ; Zhengyou Liu
• 关键词：A. Graded phononic crystal ; D. Guiding acoustic waves
• 刊名：Solid State Communications
• 出版年：2008
• 出版时间：October 2008
• 年：2008
• 卷：148
• 期：1-2
• 页码：74-77
• 全文大小：1493 K

文摘

By virtue of the flat-shaped dispersion surface, acoustic wave beams inside a phononic crystal can propagate in a self-collimated or non-diffractive way. In this paper, we show that the non-diffractively propagating acoustic beams can be further tuned, by design, to propagate in a curved path in a graded phononic crystal, which thus may be used as an alternative device to the waveguide in applications. An acoustic wave beam propagating inside a two-dimensional graded phononic crystal and bending by an angle of is demonstrated by FDTD simulation.