期刊
PHYSICAL REVIEW LETTERS
卷 117, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.034301
关键词
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资金
- National Basic Research Program of China (973 Program) [2011CB707900, 2012CB921504]
- Natural Science Foundation of China [11174138, 11174139, 11222442, 81127901]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- ONR
- [NCET-12-0254]
We use acoustic resonances in a planar layer of half-wavelength thickness to twist wave vectors of an in-coming plane wave into a spiral phase dislocation of an outgoing vortex beam with orbital angular momentum (OAM). The mechanism is numerically and experimentally demonstrated by producing an airborne Bessel-like vortex beam. Our acoustic resonance-based OAM production differs from existing means for OAM production by enormous phased spiral sources or by elaborate spiral profiles. Our study can advance the capability of generating phase dislocated wave fields for further applications of acoustic OAM.
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