Octave omnidirectional band gap in a three-dimensional phononic crystal

Abdelkrim Khelif; Fu Li Hsiao; Abdelkrim Choujaa; Sarah Benchabane; Vincent Laude

doi:10.1109/TUFFC.2010.1592

Octave omnidirectional band gap in a three-dimensional phononic crystal

Abdelkrim Khelif^*, Fu Li Hsiao, Abdelkrim Choujaa, Sarah Benchabane, Vincent Laude

^*Corresponding author for this work

CNRS

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

We report on the experimental observation of a one-octave-large omnidirectional elastic band gap for longitudinal waves in a three-dimensional phononic crystal consisting of face-centered-cubic arrays of close-packed steel beads in a solid epoxy matrix. The 60% relative width of the band gap is larger than expected based on the contrast in material properties, and is confirmed by band structure diagram and transmission spectra computations. The coupling between shear and longitudinal polarizations is pointed out as a mechanism for enlarging the band gap by comparing with the steel beads in water matrix case.

Original language	English
Article number	5507664
Pages (from-to)	1621-1625
Number of pages	5
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	57
Issue number	7
DOIs	https://doi.org/10.1109/TUFFC.2010.1592
Publication status	Published - Jul 2010
Externally published	Yes

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AU - Laude, Vincent

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AB - We report on the experimental observation of a one-octave-large omnidirectional elastic band gap for longitudinal waves in a three-dimensional phononic crystal consisting of face-centered-cubic arrays of close-packed steel beads in a solid epoxy matrix. The 60% relative width of the band gap is larger than expected based on the contrast in material properties, and is confirmed by band structure diagram and transmission spectra computations. The coupling between shear and longitudinal polarizations is pointed out as a mechanism for enlarging the band gap by comparing with the steel beads in water matrix case.

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Octave omnidirectional band gap in a three-dimensional phononic crystal

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