Acoustic carpet cloak based on an ultrathin metasurface

A structure composed of arrays of membrane-capped cavities has been investigated for acoustic cloaking applications. Unlike most metasurface unit cells found in the literature, where the phase manipulation relies on the effective acoustic path, here the control of the reflected wave phase lag/lead is simply achieved through surface impedance changes over the membranes, thus resulting in ultrathin unit cells.

Article in OPEN ACCESS

Phys. Rev. B 94, 014302 (2016) - Acoustic carpet cloak based on an ultrathin metasurface