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Bilal OR, Foehr A, Daraio C. Reprogrammable Phononic Metasurfaces. Adv Mater. 2017;29(39)doi: 10.1002/adma.201700628.
Bilal, O. R., Foehr, A., & Daraio, C. (2017). Reprogrammable Phononic Metasurfaces. Advanced materials (Deerfield Beach, Fla.), 29(39), . https://doi.org/10.1002/adma.201700628
Bilal, Osama R, et al. "Reprogrammable Phononic Metasurfaces." Advanced materials (Deerfield Beach, Fla.) vol. 29,39 (2017). doi: https://doi.org/10.1002/adma.201700628
Bilal OR, Foehr A, Daraio C. Reprogrammable Phononic Metasurfaces. Adv Mater. 2017 Oct;29(39). doi: 10.1002/adma.201700628. Epub 2017 Aug 25. PMID: 28841769.
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Adv Mater. 2017 Oct;29(39). doi: 10.1002/adma.201700628. Epub 2017 Aug 25.

Reprogrammable Phononic Metasurfaces.

Advanced materials (Deerfield Beach, Fla.)

Osama R Bilal, André Foehr, Chiara Daraio

Affiliations

  1. Institute for Theoretical Physics, ETH Zurich, Zurich, 8092, Switzerland.
  2. Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland.
  3. Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, USA.

PMID: 28841769 DOI: 10.1002/adma.201700628

Abstract

Phononic metamaterials rely on the presence of resonances in a structured medium to control the propagation of elastic waves. Their response depends on the geometry of their fundamental building blocks. A major challenge in metamaterials design is the realization of basic building blocks that can be tuned dynamically. Here, a metamaterial plate is realized that can be dynamically tuned by harnessing geometric and magnetic nonlinearities in the individual unit cells. The proposed tuning mechanism allows a stiffness variability of the individual unit cells and can control the amplitude of transmitted excitation through the plate over three orders of magnitude. The concepts can be extended to metamaterials at different scales, and they can be applied in a broad range of engineering applications, from seismic shielding at low frequency to ultrasonic cloaking at higher frequency ranges.

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: adaptive waveguiding; analog and digital materials; phononic metamaterials; programmable materials; real-time tunability

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