FEMTO-ST-Franche Comté Electronique Mécanique Thermique et Optique - Sciences et Technologies
Video de présentationFrom basic research to industrial partnership
Millimeter-sized phononic crystals
- Phononic crystals
- Millimeter-sized phononic crystals
- Micron-scale phononic crystals
Millimeter-sized phononic crystals
Bent phononic waveguide
In order to unveil the potential lying behind phononic crystals, we have set up a series of experiments at the millimeter scale aiming at characterizing bidimensional structures composed of steel rods arranged in either square, triangular or honeycomb lattices and immersed in water. These rods can be easily removed and replaced, which makes it easy to reconfigure the phononic crystal or to introduce line or point defects.
We have thus been able to show that such a phononic structures exhibit complete band gaps for each of the previously mentioned lattice geometries. We also have demonstrated that defects in phononic crystals allow for a very high confinement of the acoustic energy resulting in waveguides with unprecedented efficiency.
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