期刊
AIP ADVANCES
卷 6, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4961062
关键词
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资金
- National Basic Research Program of China [2015CB755500]
- National Natural Science Foundation of China [11374233, 11504275, 11574233, 11534013]
Based on the Huygens-Fresnel principle, a metasurface structure is designed to generate a sound vortex beam in airborne environment. The metasurface is constructed by a thin planar plate perforated with a circular array of deep subwavelength resonators with desired phase and amplitude responses. The metasurface approach in making sound vortices is validated well by full-wave simulations and experimental measurements. Potential applications of such artificial spiral beams can be anticipated, as exemplified experimentally by the torque effect exerting on an absorbing disk. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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