JIN, Yabin; KUMAR, Raj; PONCELET, Olivier; MONDAIN-MONVAL, Olivier; BRUNET, Thomas

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JIN, Yabin

KUMAR, Raj
Centre de Recherche Paul Pascal [CRPP]

PONCELET, Olivier

Langue

Article de revue

Ce document a été publié dans

Nature Communications. 2019-12, vol. 10, n° 1

Nature Publishing Group

Résumé en anglais

Recently, metasurfaces have been proven to be effective and compact devices for the design of arbitrary wavefronts. Metasurfaces are planar metamaterials with a subwavelength thickness that allows wavefront shaping by introducing in-plane variations, namely, gradients, in the spatial wave response of these flat structures. Here we report a new class of acoustic gradient-index (GRIN) metasurfaces engineered from soft graded-porous silicone rubber with a high acoustic index for broadband ultrasonic three-dimensional wavefront shaping in water. The functionalities of these soft flat lenses are illustrated through various experiments, which demonstrate beam steering and beam focusing, as well as vortex beam generation in freespace. These new GRIN metasurfaces may have important applications in various domains using designed ultrasonic fields (biomedical imaging, industrial non-destructive testing, contactless particle manipulation), since their fabrication is very straightforward with common polymer science engineering.< Réduire

Mots clés en anglais

Flat acoustics

metasurfaces

URI

https://oskar-bordeaux.fr/handle/20.500.12278/76888

Project ANR

Advanced Materials by Design - ANR-10-LABX-0042
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
Revêtements fonctionnels acoustiques à base de Métamatériaux souples - ANR-15-CE08-0024

Origine

Importé de hal

Unités de recherche

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295