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  • Letter
  • Open Access

Extreme wave skewing and dispersion spectra of anisotropic elastic plates

Daniel A. Kiefer*, Sylvain Mezil, and Claire Prada

  • *Contact author: daniel.kiefer@espci.fr
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Phys. Rev. Research 7, L012043 – Published 26 February, 2025

DOI: https://doi.org/10.1103/PhysRevResearch.7.L012043

Abstract

Guided wave dispersion is commonly assessed by Fourier analysis of the field along a line, resulting in frequency-wave-number dispersion curves. In anisotropic plates, a point source can generate multiple dispersion branches pertaining to the same modal surface, which arise due to the angle between the power flux and the wave vector. We show that this phenomenon is very particular near zero-group-velocity points and occurs in all directions independent of the degree of anisotropy. Stationary phase points accurately describe measurements on a monocrystalline silicon plate.

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Phys. Rev. Research 7, L012043– Published 26 February, 2025
  • Received 8 March 2024
  • Revised 1 July 2024
  • Accepted 16 January 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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