期刊
APPLIED PHYSICS LETTERS
卷 108, 期 20, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4949337
关键词
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资金
- National Basic Research Program of China (973 Program) [2011CB707900, 2012CB921504]
- National Natural Science Foundation of China [11174138, 11174139, 11222442, 81127901, 11274168]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- [NCET-12-0254]
We present the analytical design and experimental realization of a scheme based on multi-arm coiling slits to generate the stable acoustic vortices in a broadband. The proposed structure is able to spiral the acoustic wave spatially and generate the twisted acoustic vortices with invariant topological charge for a long propagation distance. Compared with conventional methods which require the electronic control of a bulky loudspeaker, this scheme provides an effective and compact solution to generate acoustic vortices with controllable topological charge in the broadband, which offers more initiatives in the demanding applications. Published by AIP Publishing.
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