4.6 Article

Elastodynamic behavior of the three dimensional layer-by-layer metamaterial structure

Journal

JOURNAL OF APPLIED PHYSICS
Volume 116, Issue 13, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.4896766

Keywords

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Funding

  1. University of Patras
  2. European Union
  3. Greek national funds through the Operational Program Regional Operational Programme of the National Strategic Reference Framework (NSRF)-Research Funding Program: Support for research, technology and innovation actions in Region of Western Greece
  4. EU projects ENSEMBLE [213669]
  5. Greek project ERC-02 ExEL [6260]

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In this work, we numerically investigate for the first time the elastodynamic behavior of a three dimensional layer-by-layer rod structure, which is easy to fabricate and has already proved to be very efficient as a photonic crystal. The Finite Difference Time Domain method was used for the numerical calculations. For the rods, several materials were examined and the effects of all the geometric parameters of the structure were also numerically investigated. Additionally, two modifications of the structure were included in our calculations. The results obtained here (for certain geometric parameters), exhibiting a high ratio of longitudinal over transverse sound velocity and therefore a close approach to ideal pentamode behavior over a frequency range, clearly show that the layer-by-layer rod structure, besides being an efficient photonic crystal, is a very serious contender as an elastodynamic metamaterial. (C) 2014 AIP Publishing LLC.

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