Electrical control of water waves
Spatial control of water waves is commonly performed by placing solid inclusions in the fluid, which is heavily invasive and generally increases dissipation. To overcome those limitations, we explored a new way to control water waves using high elecric fields. The latter allow precise, non-invasive and reconfigurable refractive control that we used to focus, reflect or guide water waves !
Time-varying media for water waves
On top of spatial control, we also used electrical forces to create time-varying media for water waves. The latter have recently emerged as a new method of control of waves by leveraging the temporal degrees of freedom. For instance, such media allows to perform frequency conversion, which is not possible in a linear static media. However, experimental realizations remain challenging. We have shown that water waves could be controlled using high electric fields, and that the variation of the electric field along time results in an effective implementation of time-varying media with excellent control. This allowed us to perform large frequency conversion through linear process, and to study wave propagation in disordered time-vayring media.
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