Ultrasonic and hypersonic phononic crystals

A. Khelif, F. L. Hsiao, S. Benchabane, A. Choujaa, B. Aoubiza, V. Laude

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


We report on the experimental and theoretical investigation two kinds of acoustic waves in two dimensional phononic crystal: bulk acoustic waves and surface acoustic waves. For bulk acoustic waves, the work focuses on the experimental observation of full acoustic band gaps in a two-dimensional lattice of steel cylinders immersed in water as well as deaf bands that cause strong attenuation in the transmission for honeycomb and triangular lattices. For surface acoustic waves, complete acoustic band gaps found experimentally in a two-dimensional square-lattice piezoelectric phononic crystal etched in lithium niobate will be presented. Propagation in the phononic crystal is studied by direct generation and detection of surface waves using interdigital transducers. The complete band gap extends from 203 to 226 MHz, in good agreement with theoretical predictions. Near the upper edge of the complete band gap, it is observed that radiation to the bulk of the substrate dominates. This observation is explained by introducing the concept of sound line.

Original languageEnglish
Title of host publicationPhotonic Crystal Materials and Devices VII
Publication statusPublished - 2008 May 21
EventPhotonic Crystal Materials and Devices VII - San Jose, CA, United States
Duration: 2008 Jan 212008 Jan 23

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherPhotonic Crystal Materials and Devices VII
CountryUnited States
CitySan Jose, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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