Minimal model for spoof acoustoelastic surface states

Johan Christensen; Z. Liang; Morten Willatzen

doi:10.1063/1.4901282

Minimal model for spoof acoustoelastic surface states

Johan Christensen, Z. Liang, Morten Willatzen

Shenzhen University

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Abstract

Similar to textured perfect electric conductors for electromagnetic waves sustaining artificial or spoof surface plasmons we present an equivalent phenomena for the case of sound. Aided by a minimal model that is able to capture the complex wave interaction of elastic cavity modes and airborne sound radiation in perfect rigid panels, we construct designer acoustoelastic surface waves that are entirely controlled by the geometrical environment. Comparisons to results obtained by full-wave simu- lations confirm the feasibility of the model and we demonstrate illustrative examples such as resonant transmissions and waveguiding to show a few examples of many where spoof elastic surface waves are useful.

Original language	English
Article number	124301
Journal	A I P Advances
Volume	4
Number of pages	7
ISSN	2158-3226
DOIs	https://doi.org/10.1063/1.4901282
Publication status	Published - 2014

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C 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

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AB - Similar to textured perfect electric conductors for electromagnetic waves sustaining artificial or spoof surface plasmons we present an equivalent phenomena for the case of sound. Aided by a minimal model that is able to capture the complex wave interaction of elastic cavity modes and airborne sound radiation in perfect rigid panels, we construct designer acoustoelastic surface waves that are entirely controlled by the geometrical environment. Comparisons to results obtained by full-wave simu- lations confirm the feasibility of the model and we demonstrate illustrative examples such as resonant transmissions and waveguiding to show a few examples of many where spoof elastic surface waves are useful.

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Minimal model for spoof acoustoelastic surface states

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