期刊
SOLID STATE COMMUNICATIONS
卷 229, 期 -, 页码 28-31出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2015.12.015
关键词
Acoustic metasurface; Double-split hollow sphere; Meta-molecule; Anomalous reflection
资金
- National Natural Science Foundation of China [11404261, 11174234, 51272215]
- Northwestern Polytechnical University Foundation for Basic Research [JC20120244, G2015KY0302]
We experimentally present an acoustic metasurface (AMS) with sub-wavelength thickness based on the meta-molecule consisting of eight different sized double-split hollow spheres (DSHSs). By designing the discontinuous phase profile covered 2 pi span induced by the DSHSs, the AMS can manipulate the reflected acoustic waves in a way that could not be imitated by natural materials. Both simulations and experiments show that the AMS can realize anomalous reflection, i.e., a normal incident wave can be reflected into an oblique direction. Moreover, the reflection angle can be flexible controlled by mechanically tuning the spatial distance of the DSHSs in the AMS, which is consistent with the generalized Snell's law. (C) 2016 Elsevier Ltd. All rights reserved.
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