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Acoustic Splitting and Bending with Compact Coding Metasurfaces

Acoustic metasurfaces have drawn great interest for their flexibility in acoustic field manipulation, but are being held back in practice by their complex configurations and narrow frequency range. This study uses hornlike helices in the logical units of a compact coding metasurface that yields broadband acoustic bending and splitting. Such a simple, aperiodic design in compact coding metasurfaces could promote innovative techniques of acoustic wave control.