Title :

Negative refraction of acoustic waves using a foam-like metallic structure

Author(s) :

Hladky, Anne-Christine [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Vasseur, Jérôme [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Haw, G. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Croenne, Charles [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Haumesser, L. [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN]
Norris, A.N. [Auteur]

Journal title :

Applied Physics Letters

Pages :

144103

Publisher :

American Institute of Physics

Publication date :

2013

ISSN :

0003-6951

English keyword(s) :

Medical imaging
Acoustical properties
Crystal structure
Acoustic waves
Negative index materials
Aluminium
Ultrasonics
Photonic crystals
Elastic moduli
Acoustic wave propagation

HAL domain(s) :

Sciences de l'ingénieur [physics]/Acoustique [physics.class-ph]

English abstract : [en]

A phononic crystal (PC) slab made of a single metallic phase is shown, theoretically and experimentally, to display perfect negative index matching and focusing capability when surrounded with water. The proposed PC slab ...
Show more >A phononic crystal (PC) slab made of a single metallic phase is shown, theoretically and experimentally, to display perfect negative index matching and focusing capability when surrounded with water. The proposed PC slab is a centimeter scale hollow metallic foam-like structure in which acoustic energy is mediated via the metal lattice. The negative index property arises from an isolated branch of the dispersion curves corresponding to a mode that can be coupled to incident acoustic waves in surrounding water. This band also intercepts the water sound line at a frequency in the ultrasonic range. The metallic structure is consequently a candidate for the negative refraction of incident longitudinal waves.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL