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Article Dans Une Revue New Journal of Physics Année : 2019

Observation of topological gravity-capillary waves in a water wave crystal

Résumé

The discovery of topological phases of matter, initially driven by theoretical advances in quantum condensed matter physics, has been recently extended to classical wave systems, reaching out to a wealth of novel potential applications in signal manipulation and energy concentration. Despite the fact that wave propagation in many realistic media (metals at optical frequencies, polymers at ultrasonic frequencies) is inherently dispersive, topological wave transport in photonic and phononic crystals has so far been limited to ideal situations and proof-of-concept experiments involving dispersionless media. Here, we report the first experimental demonstration of topological edge states in a classical water wave system supporting highly dispersive wave propagation, in the intermediate regime of gravity-capillary waves. We use a stochastic method to rigorously take into account the inherent dispersion and devise a water wave crystal insulator supporting valley-selective transport at topological domain walls. Our measurements, performed with a high-speed camera under stroboscopic illumination, unambiguously demonstrate the possibility of valley-locked transport of water waves.
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Dates et versions

hal-02371018 , version 1 (19-11-2019)

Identifiants

  • HAL Id : hal-02371018 , version 1

Citer

Nicolas Laforge, Vincent Laude, Franck Chollet, Abdelkrim Khelif, Muamer Kadic, et al.. Observation of topological gravity-capillary waves in a water wave crystal. New Journal of Physics, 2019, 21, pp.083031 (11). ⟨hal-02371018⟩
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