Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 48, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/48/4/045303
Keywords
acoustic metasurface; split hollow sphere; anomalous reflection; phase gradient
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Funding
- National Natural Science Foundation of China [51272215, 11404261, 11174234]
- Northwestern Polytechnical University Foundation for Basic Research [JC20120244]
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This paper presents an acoustic metasurface (AMS) model consisting of split hollow sphere (SHS) resonator arrays with the property of negative modulus. It shows that the AMS can imprint phase discontinuities on an acoustic reflected wave as it traverses the interface between two media. By designing suitable phase gradients, the AMS enables the perpendicularly incident acoustic wave to be converted to a surface wave or reflected in any angle. Four kinds of AMSs, which can anomalously manipulate the reflected wave's direction, are simulated to fulfill the generalized Snell's law. The results provide an available and simple path to experimentally achieving the AMS.
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