Anomalous Reflection of Acoustic Waves in Air with Metasurfaces at Low Frequency

Figure 6

Acoustic nondiffracting Airy beam. (a) The squared absolute pressure field of reflected waves. The red arrows represent the propagation direction of incident plane wave. (b) The transient pressure field distribution of reflected waves. The black dashed arrow indicates the travel trajectory of the acoustic energy.

(a)

(b)