Sound Waveguiding by Spinning: An Avenue toward Unidirectional Acoustic Spinning Fibers

Mohamed Farhat, Pai-Yen Chen, Ying Wu

Research output: Contribution to journalArticlepeer-review


Waveguiding in general and acoustic waveguiding in particular are possible under the condition of a transverse “discontinuity” or modulation in the refractive index. We propose a radically different approach that relies on imposing spinning on a column of air, leading to highly modified acoustic refractive indices for specific azimuthal modes. This result may be leveraged to realize not only the airborne acoustic counterpart of an optical fiber, i.e., an acoustic spinning fiber, but also a nonreciprocal unidirectional waveguiding mechanism, reminiscent of an “acoustic Zeeman effect.” The concept is demonstrated in the realm of acoustics, but may be applicable to other wave systems, e.g., in elastodynamics.
Original languageEnglish (US)
JournalPhysical Review Applied
Issue number4
StatePublished - Apr 26 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-05-02
Acknowledged KAUST grant number(s): BAS/1/1626-01-01, OSR-2020-CRG9-4374
Acknowledgements: This work was supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Grant No. OSR-2020-CRG9-4374, as well as the KAUST Baseline Research Fund, Grant No. BAS/1/1626-01-01.

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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