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Influence of lattice symmetry on ultrasound transmission through plates with subwavelength aperture arrays

We study the transmission of sound waves through aluminum plates perforated with square and triangular hole arrays. We demonstrate both theoretically and experimentally that lattice symmetry affects the position of the Wood anomalies and the width of the transmission peaks. The angle and frequency d...

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Bibliographic Details
Published in:Applied physics letters 2009-08, Vol.95 (5), p.051906-051906-3
Main Authors: Estrada, Héctor, Candelas, Pilar, Uris, Antonio, Belmar, Francisco, García de Abajo, F. Javier, Meseguer, Francisco
Format: Article
Language:English
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Summary:We study the transmission of sound waves through aluminum plates perforated with square and triangular hole arrays. We demonstrate both theoretically and experimentally that lattice symmetry affects the position of the Wood anomalies and the width of the transmission peaks. The angle and frequency dependence of sound transmission through perforated plates are thoroughly discussed. Finally, we observe unexpected anisotropic behavior in the long-wavelength Lamb-mode bands of perforated plates.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3196330