C| Auteur(s): | F. Van der Biest, A. Sukhovich, A. Tourin, J.-H Page, B. A. Van Tiggelen, Z. Liu, M. Fink |
| Titre: | Resonant tunneling, of acoustic waves through a double barrier consisting of two phononic crystals |
| Référence: | Europhys. Lett.71 , pp 63-69, 2005 |
| Type de publication: | Publication dans une revue à comité de lecture |
| Revue: | Europhysics Letters |
| Soumis en mars 2005, accepté en avril 2005 et publié en mai 2005 | |
Résumé:
We present the acoustic analog of resonant tunneling through a double barrier in
quantum mechanics. Pairs of identical phononic crystals, in both 2D and 3D, were assembled
and separated by a uniform spacer, forming a resonant cavity. The ultrasonic transmission exhibits
resonant peaks at frequencies inside the band gaps, where ultrasound tunneling through
each phononic crystal occurs. On resonance, the measured group time is large and even predicted
to increase exponentially with the thickness of the crystals in the absence of absorption,
while off resonance very fast speeds are found.
Mots-clés: phononic crystals, resonant tunneling