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Proceedings Paper

Anomalous refraction of guided waves via embedded acoustic metasurfaces
Author(s): Hongfei Zhu; Fabio Semperlotti
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Paper Abstract

We illustrate the design of acoustic metasurfaces based on geometric tapers and embedded in thin-plate structures. The metasurface is an engineered discontinuity that enables anomalous refraction of guided wave modes according to the Generalized Snell’s Law. Locally-resonant geometric torus-like tapers are designed in order to achieve metasurfaces having discrete phase-shift profiles that enable a high level of control of refraction of the wavefronts. Results of numerical simulations show that anomalous refraction can be achieved on transmitted anti-symmetric modes (A0) either when using a symmetric (S0) or anti-symmetric (A0) incident wave, where the former case clearly involves mode conversion mechanisms.

Paper Details

Date Published: 1 April 2016
PDF: 7 pages
Proc. SPIE 9805, Health Monitoring of Structural and Biological Systems 2016, 98051F (1 April 2016); doi: 10.1117/12.2218915
Show Author Affiliations
Hongfei Zhu, Univ. of Notre Dame (United States)
Fabio Semperlotti, Univ. of Notre Dame (United States)
Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 9805:
Health Monitoring of Structural and Biological Systems 2016
Tribikram Kundu, Editor(s)

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