Octave omnidirectional band gap in a three-dimensional phononic crystal

Abdelkrim Khelif, Fu-Li Hsiao, Abdelkrim Choujaa, Sarah Benchabane, Vincent Laude

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


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 languageEnglish
Article number5507664
Pages (from-to)1621-1625
Number of pages5
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Issue number7
Publication statusPublished - 2010 Jul 1

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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