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Superscattering of water waves

ABSTRACT: ABSTRACT Inspired by the concept of superscattering in optics, we for the first time theoretically predict and experimentally demonstrate the superscattering phenomenon in water waves. The subwavelength superscatterer is constructed by multi-layered concentric cylinders with an inhomogeneous depth profile. The superscatterer breaks the long-held single-channel scattering limit by several times and thus significantly enhances the total scattering strength. The underlying mechanism originates from the near degeneracy of the resonances of multiple channels. We fabricate the superscatterer prototype and experimentally measure the near-field patterns, which are consistent with theoretical prediction and numerical simulation. Our study opens a new avenue to strengthen water-wave scattering and deepen the understanding in water waves, which can be useful for ocean energy harvesting and harbor protection. Enhancing water wave scattering can endow subwavelength entities with the ability to capture more energy from large areas, and water wave superscattering provide a new paradigm for achieving this goal and deepening the understanding of water wave propagation mechanism.

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PROVIDER: S-EPMC10232047 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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