Experimental demonstration of epsilon-near-zero water waves focusing

T. Bobinski (1) , A. Eddi (1) , P. Petitjeans (1) , A. Maurel (2) , V. Pagneux (3)

1 PMMH - Physique et mécanique des milieux hétérogenes (UMR 7636)
2 IL - Institut Langevin - Ondes et Images (UMR7587)
3 LAUM - Laboratoire d'Acoustique de l'Université du Mans

We explore an ϵ-near-zero analogue for water waves using deep water and shallow water domains to obtain different phase velocities. Being inherently non linear, water waves permit to inspect focusing of harmonically generated waves. Experimental measurements show cascade of focal spots up to the fourth harmonic, allowing sub wavelength focusing with respect to the first harmonic wavelength.

Mots clés: Wave propagation; Refraction; Profilometry; Dispersion function; Wave mechanics; Friction; Rayleigh's criterion; Geometrical optics; Lenses; Optical properties

Domaines: Mécanique des fluides [physics.class-ph]

T. Bobinski, A. Eddi, P. Petitjeans, A. Maurel, V. Pagneux. Experimental demonstration of epsilon-near-zero water waves focusing. Applied Physics Letters, 2015, 107 (1), pp.014101. ⟨10.1063/1.4926362⟩. ⟨hal-02991341⟩