Guiding and bending of acoustic waves in highly confined phononic crystal waveguides

被引：455

作者：

Khelif, A

Choujaa, A

Benchabane, S

Djafari-Rouhani, B

Laude, V

机构：

[1] Univ Franche Comte, CNRS,UMR 6174, Dept LPMO, Inst FEMTO ST, F-25044 Besancon, France

[2] Univ Lille 1, CNRS, UMR 8024, Lab Dynam & Struct Mat Mol, F-59655 Villeneuve Dascq, France

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 22期

关键词：

D O I：

10.1063/1.1757642

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate experimentally the guiding and the bending of acoustic waves in highly confined waveguides formed by removing rods from a periodic two-dimensional lattice of steel cylinders immersed in water. Full transmission is observed for a one-period-wide straight waveguide within the full band gap of the perfect phononic crystal. However, when the waveguide width is doubled, destructive interference causes the transmission to vanish in the center of the passband. Waveguiding over a wide frequency range is obtained for a one-period-wide waveguide with two sharp 90degrees bends. Finite-difference time-domain computations are found to be in good agreement with the measurements. (C) 2004 American Institute of Physics.

引用

页码：4400 / 4402

页数：3

共 15 条

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