Abstract
Acoustic metasurfaces are thin, engineered structures that can control the local reflection and transmission phase of acoustic waves, and thus enable a high degree of flexibility of wave manipulation. They are currently under active investigation by a multiple research groups for diffractive acoustic elements, surface mode excitation, extraordinary wave transmission, and a number of other possible applications. We will describe our recent work in the area of acoustic metasurfaces based on both rigid labyrinthine passive structures and piezoelectric-based active structures. Specific topics will include optimization of passive metasurface structure, nonlinear and reconfigurable active metasurfaces, and control of acoustic diffraction and surface waves with periodic metasurfaces.
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