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Implementation of dispersion-free slow acoustic wave propagation and phase engineering with helical-structured metamaterials

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  • Xuefeng Zhu

    (College of Physical Science and Technology, Heilongjiang University
    Huazhong University of Science and Technology
    Innovation Institute, Huazhong University of Science and Technology)

  • Kun Li

    (College of Physical Science and Technology, Heilongjiang University)

  • Peng Zhang

    (State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences)

  • Jie Zhu

    (the Hong Kong Polytechnic University, Hung Hom)

  • Jintao Zhang

    (College of Physical Science and Technology, Heilongjiang University)

  • Chao Tian

    (University of Michigan)

  • Shengchun Liu

    (College of Physical Science and Technology, Heilongjiang University
    University of Michigan)

Abstract

The ability to slow down wave propagation in materials has attracted significant research interest. A successful solution will give rise to manageable enhanced wave–matter interaction, freewheeling phase engineering and spatial compression of wave signals. The existing methods are typically associated with constructing dispersive materials or structures with local resonators, thus resulting in unavoidable distortion of waveforms. Here we show that, with helical-structured acoustic metamaterials, it is now possible to implement dispersion-free sound deceleration. The helical-structured metamaterials present a non-dispersive high effective refractive index that is tunable through adjusting the helicity of structures, while the wavefront revolution plays a dominant role in reducing the group velocity. Finally, we numerically and experimentally demonstrate that the helical-structured metamaterials with designed inhomogeneous unit cells can turn a normally incident plane wave into a self-accelerating beam on the prescribed parabolic trajectory. The helical-structured metamaterials will have profound impact to applications in explorations of slow wave physics.

Suggested Citation

  • Xuefeng Zhu & Kun Li & Peng Zhang & Jie Zhu & Jintao Zhang & Chao Tian & Shengchun Liu, 2016. "Implementation of dispersion-free slow acoustic wave propagation and phase engineering with helical-structured metamaterials," Nature Communications, Nature, vol. 7(1), pages 1-7, September.
  • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11731
    DOI: 10.1038/ncomms11731
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    Cited by:

    1. Zong-Lin Li & Kun Chen & Fei Li & Zhi-Jun Shi & Qi-Li Sun & Peng-Qi Li & Yu-Gui Peng & Lai-Xin Huang & Guang Yang & Hairong Zheng & Xue-Feng Zhu, 2023. "Decorated bacteria-cellulose ultrasonic metasurface," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Yifan Zhu & Liyun Cao & Aurélien Merkel & Shi-Wang Fan & Brice Vincent & Badreddine Assouar, 2021. "Janus acoustic metascreen with nonreciprocal and reconfigurable phase modulations," Nature Communications, Nature, vol. 12(1), pages 1-10, December.

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