title: Experimental realization of a water-wave metamaterial shifter.
abstract: We demonstrate by quantitative experimental measurements that metamaterials with anisotropic properties can be used in the context of water waves to produce a reflectionless bent waveguide. The anisotropic medium consists in a bathymetry with subwavelength layered structure that shifts the wave in the direction of the waveguide bending (10°, 20°, and 30°). The waveguide filled with such metamaterial is tested experimentally and compared to a reference empty bent waveguide. The experimental method used to characterize the wave field allows for space-time resolved measurements of water elevation. Results show the efficiency of the shifter. Modal treatment of the experimental data confirms that the metamaterial prevents higher modes from being excited in the waveguide.
authors: Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom.
authors: C P
authors: CP
authors: Berraquero
authors: Institut Langevin LOA, UMR CNRS 7587-ESPCI, 5 rue Jussieu, 75005 Paris, France.
authors: A
authors: A
authors: Maurel
authors: Laboratoire de Physique et Mécanique des Milieux Hétérogènes (PMMH), UMR CNRS 7636-ESPCI-UPMC Univ. Paris 6-UPD Univ. Paris 7, 10 rue Vauquelin, 75005 Paris, France.
authors: P
authors: P
authors: Petitjeans
authors: Laboratoire d'Acoustique de l'Université du Maine, UMR CNRS 6613, Avenue Olivier Messiaen, 72085 Le Mans, France.
authors: V
authors: V
authors: Pagneux