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Phononic crystals

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The "Phononic Crystal" group

Objectives

Phononic crystals have been at the heart of a large part of our activities since 2002. They are artificial periodical structures which can exhibit band gaps for elastic or acoustic waves. We are carrying out research activities along two main axes. We are setting up proof-of-concept experiments at the millimeter scale in order to demonstrate the band gap related properties of 2D or 3D phononic crystals made of different constitutive materials. In addition, we investigate phononic micro- and nano-structures allowing to obtain band gaps in the microsonic or hypersonic regime, with a long term objective being the integration of phononic structures to telecommunication components.

Silicon phononic crystal

Silicon phononic crystal

We have been investigating both theoretically and experimentally millimeter-sized phononic crystals made of solid inclusions immersed in a fluid matrix using ultrasound techniques, as well as innovative surface acoustic wave (SAW) devices at the micron-scale, using the electro-acoustic coupling.
We have been developing simulations tools based on finite difference time domain, plane wave expansion or finite element method. We also devote part of our activities to the fabrication of phononic devices using the facilities available at the MIMENTO Technology Center and we are provided with all the equipment necessary for their electrical characterization.

Please follow this link for a short introduction to phononic crystals.

People

Researchers
  • Sarah Benchabane
  • Jean-Charles Beugnot
  • Abdelkrim Choujaa
  • Abdelkrim Khelif (currently with the International Joint Research Unit GeorgiaTech-CNRS, Atlanta, USA)
  • Vincent Laude (group leader)
PhD Students
  • Younes Achaoui
  • Rayisa Moiseyenko (co-advised by Nico Declercq, GeorgiaTech-CNRS)
  • Said Sadat Saleh (co-affiliated to the Nano-optics group of FEMTO-ST)
Invited Members
  • Boujemaa Aoubiza, Laboratoire de Mathématiques de Franche-Comté
Alumni
  • Maria Bayard Dürhing, Technical University of Denmark
  • Fu-Li Hsiao (National Central university, Taiwan)
  • Carlos Jerez Hanckes (ETH Zurich, Switzerland)
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