Guiding and bending of acoustic waves in highly confined phononic crystal waveguides
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- A. Khelif
- Institut FEMTO-ST, Département LPMO, CNRS UMR 6174, Université de Franche-Comté, 32 Avenue de l’Observatoire, 25044 Besançon Cedex, France
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- A. Choujaa
- Institut FEMTO-ST, Département LPMO, CNRS UMR 6174, Université de Franche-Comté, 32 Avenue de l’Observatoire, 25044 Besançon Cedex, France
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- S. Benchabane
- Institut FEMTO-ST, Département LPMO, CNRS UMR 6174, Université de Franche-Comté, 32 Avenue de l’Observatoire, 25044 Besançon Cedex, France
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- B. Djafari-Rouhani
- Laboratoire de Dynamique et Structures des Matériaux Moléculaires, CNRS UMR 8024, Université de Lille I, 59655 Villeneuve d’ascq Cedex, France
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- V. Laude
- Institut FEMTO-ST, Départment LPMO, CNRS UMR 6174, Université de Franche-Comté, 32 Avenue de l’Observatoire, 25044 Besançon Cedex, France
書誌事項
- 公開日
- 2004-05-31
- DOI
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- 10.1063/1.1757642
- 公開者
- AIP Publishing
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説明
<jats:p>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 90° bends. Finite-difference time-domain computations are found to be in good agreement with the measurements.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 84 (22), 4400-4402, 2004-05-31
AIP Publishing