Tunable metasurface for acoustic wave redirection, focusing and source illusion

Zhong Chen, Shixuan Shao, Mehrdad Negahban, Zheng Li

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Metasurfaces present excellent performance in acoustic wave control with subwavelength thickness, but are typically studied and built for fixed applications. This paper looks at a convenient tunable metasurface design with Helmholtz resonance. Moving sliders in the design allow full phase shift with a high transmission ratio in a broad frequency bandwidth. The design can be used for tunable wave front redirection, focusing with varying wavelengths and sound source illusion, as are shown in numerical and experimental examples. This design could be a superb option when there is a need for tunable acoustic wave modulation.

Original languageEnglish (US)
Article number395503
JournalJournal of Physics D: Applied Physics
Issue number39
StatePublished - Jul 23 2019


  • acoustic metasurface
  • tunable illusion effect
  • tunable redirection angle and focusing length

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films


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