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

Xue Jiang, Jiajun Zhao, Shi-lei Liu, Bin Liang, Xin-ye Zou, Jing Yang, Cheng-Wei Qiu, Jian-chun Cheng

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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.
Original languageEnglish (US)
Pages (from-to)203501
JournalApplied Physics Letters
Issue number20
StatePublished - May 16 2016

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