Abstract
In recent years, metamaterials have been used to manipulate wave fronts in various ways, affecting the propagation of waves, and exerting different its application values. Based on the generalized Snell’s law derived from Fermat’s principle, the article takes advantage of the high integration of metamaterials at the sub-wavelength scale to construct an acoustic metasurface artificial structure and expands it to a periodic type. Under the condition of ensuring the constant transmittance when acoustic wave passes through the interface of the two media, through the phase modulation of the acoustic wave on the surface of the structure, the strange phenomenon of abnormal refraction is generated, and the arbitrary manipulation of the wave is realized effectively.
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