Flat lens for pulse focusing of elastic waves in thin plates

M. Dubois, M. Farhat, E. Bossy, S. Enoch, S. Guenneau, P. Sebbah

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

The ability of left-handed materials to overcome the diffraction limit was first considered as one of the most exciting and challenging outcomes of the negative refraction concept. Flat lens focusing of elastic waves is, however, a challenge. We demonstrate broadband focusing of elastic waves at 10 kHz carrier frequency, below the first stop band, in a 45°-tilted square array of circular air holes perforated in a Duraluminium thin plate. By adjusting the relative thickness of the outer plate we achieve large-angle negative refraction with diffraction-limited lateral resolution. We find good agreement with a simple beam-lattice model and finite-difference time-domain simulations.

Original languageEnglish
Article number071915
JournalApplied Physics Letters
Volume103
Issue number7
DOIs
StatePublished - 12 Aug 2013
Externally publishedYes

Bibliographical note

Funding Information:
M.D. acknowledges Ph.D. funding from the Direction Générale de l’Armement (DGA). S.G. is thankful for an ERC starting grant funding (ANAMORPHISM). P.S. is thankful to the Agence Nationale de la Recherche support under grant ANR PLATON (No. 12-BS09-003-01), the LABEX WIFI (Laboratory of Excellence within the French Program “Investments for the Future”) under reference ANR-10-IDEX-0001-02 PSL* and the Groupement de Recherche 3219 MesoImage.

Funding

M.D. acknowledges Ph.D. funding from the Direction Générale de l’Armement (DGA). S.G. is thankful for an ERC starting grant funding (ANAMORPHISM). P.S. is thankful to the Agence Nationale de la Recherche support under grant ANR PLATON (No. 12-BS09-003-01), the LABEX WIFI (Laboratory of Excellence within the French Program “Investments for the Future”) under reference ANR-10-IDEX-0001-02 PSL* and the Groupement de Recherche 3219 MesoImage.

FundersFunder number
ANAMORPHISM
ANR-10-IDEX-0001-02PSL*
LABEX WIFI
Seventh Framework Programme279673
European Research Council
Agence Nationale de la Recherche12-BS09-003-01
Direction Générale de l’Armement

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