Broadband and stable acoustic vortex emitter with multi-arm coiling slits

Journal Article · Mon May 16 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4949337· OSTI ID:22591748

Jiang, Xue; Liang, Bin; Zou, Xin-ye; Yang, Jing; Cheng, Jian-chun ^[1]; Zhao, Jiajun ^[2]; Liu, Shi-lei ^[1]; Qiu, Cheng-Wei ^[3]

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1. Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Nanjing University, Nanjing 210093 (China)
2. Department of Physics and Center for Nonlinear Dynamics, University of Texas at Austin, Austin, Texas 78712 (United States)
3. Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)

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.

• OSTI ID: 22591748
• Journal Information: Applied Physics Letters, Vol. 108, Issue 20; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DEMAND
DESIGN
DISTANCE
SOUND WAVES
TOPOLOGY
VORTICES