Acoustic wavefront modulation with helical-structured metamaterials

Shanjun Liang, Tuo Liu, Fei Chen, Jie Zhu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

We present a sub-wavelength helical structure array for acoustic wavefront modulation with both transmission and reflection circumstances. By setting up those two kinds of structures, we realized high-efficiency sound focusing and anomalous refraction with a flat lens. The advantages of the structure are batched fabrication, superior tunability, and low loss. We adopted a series of element types with different phase manipulation properties to constitute the array for nearly arbitrary phase gradient. Our results will significantly enhance the application of acoustic metamaterials in practical projects.
Original languageEnglish
Title of host publicationINTER-NOISE 2017 - 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet
PublisherInstitute of Noise Control Engineering
Publication statusPublished - 1 Jan 2017
Event46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 - Hong Kong Convention and Exhibition Centre (HKCEC), Hong Kong, Hong Kong
Duration: 27 Aug 201730 Aug 2017

Conference

Conference46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017
Country/TerritoryHong Kong
CityHong Kong
Period27/08/1730/08/17

Keywords

  • Acoustic Focusing
  • Acoustic Metamaterial
  • Helical Structure
  • Wavefront Modulation

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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