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

A. C. Hladky-Hennion; J. O. Vasseur; G. Haw; C. Croënne; L. Haumesser; A. N. Norris

doi:10.1063/1.4801642

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

A. C. Hladky-Hennion, J. O. Vasseur, G. Haw, C. Croënne, L. Haumesser, A. N. Norris

School of Engineering, Mechanical & Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

100 Scopus citations

Abstract

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.

Original language	English (US)
Article number	144103
Journal	Applied Physics Letters
Volume	102
Issue number	14
DOIs	https://doi.org/10.1063/1.4801642
State	Published - Apr 8 2013

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4801642

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title = "Negative refraction of acoustic waves using a foam-like metallic structure",

abstract = "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.",

author = "Hladky-Hennion, {A. C.} and Vasseur, {J. O.} and G. Haw and C. Cro{\"e}nne and L. Haumesser and Norris, {A. N.}",

note = "Funding Information: The authors wish to thank ANR (Agence Nationale de la Recherche) and ONR (Office of Naval Research) for providing funding and FANO (F{\'e}d{\'e}ration Acoustique du Nord Ouest) - FR 3110 CNRS for its financial support in the manufacturing of the device, made in the Blois Institute of Technology (France).",

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AU - Hladky-Hennion, A. C.

AU - Vasseur, J. O.

AU - Haw, G.

AU - Croënne, C.

AU - Haumesser, L.

AU - Norris, A. N.

N1 - Funding Information: The authors wish to thank ANR (Agence Nationale de la Recherche) and ONR (Office of Naval Research) for providing funding and FANO (Fédération Acoustique du Nord Ouest) - FR 3110 CNRS for its financial support in the manufacturing of the device, made in the Blois Institute of Technology (France).

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N2 - 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.

AB - 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.

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

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