Source Illusion Devices for Flexural Lamb Waves Using Elastic Metasurfaces

Yongquan Liu, Zixian Liang, Fu Liu, Owen Diba, Alistair Lamb, and Jensen Li
Phys. Rev. Lett. 119, 034301 – Published 21 July 2017
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Abstract

Inspired by recent demonstrations of metasurfaces in achieving reduced versions of electromagnetic cloaks, we propose and experimentally demonstrate source illusion devices to manipulate flexural waves using metasurfaces. The approach is particularly useful for elastic waves due to the lack of form invariance in usual transformation methods. We demonstrate compact and simple-to-implement metasurfaces for shifting, transforming, and splitting a point source. The effects are measured to be broadband and robust against a change of source positions, with agreement from numerical simulations and the Huygens-Fresnel theory. The proposed method is potentially useful for applications such as nondestructive testing, high-resolution ultrasonography, and advanced signal modulation.

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  • Received 10 January 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.034301

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yongquan Liu1, Zixian Liang2, Fu Liu1, Owen Diba1, Alistair Lamb1, and Jensen Li1,*

  • 1School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
  • 2College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China

  • *Corresponding author. j.li@bham.ac.uk

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Vol. 119, Iss. 3 — 21 July 2017

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