Trapping and guiding of acoustic waves by defect modes in a full-band-gap ultrasonic crystal

被引：271

作者：

Khelif, A

Choujaa, A

Djafari-Rouhani, B

Wilm, M

Ballandras, S

Laude, V

机构：

[1] Univ Franche Comte, CNRS, UPR 3203, Lab Phys & Metrol Oscillateurs, F-25044 Besancon, France

[2] Univ Lille 1, CNRS, UMR 8034, Lab Dynam & Struct Mat Mol, F-59655 Villeneuve Dascq, France

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.68.214301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the experimental observation of the existence and the interaction of localized defect modes in a full acoustic band gap in a two-dimensional lattice of steel cylinders immersed in water. The confinement of defect modes and the splitting of their resonance frequencies are observed and are explained by their evanescent coupling. A different type of waveguiding in a phononic crystal based on the evanescent coupling of defect modes is proposed and demonstrated experimentally. The finite-difference time-domain method is used to interpret the experimental data and it is found that theoretical predictions properly account for the observed spectra.

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页数：4

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