A reconfigurable active acoustic metalens

Acoustic metasurfaces have enabled unprecedented control over acoustic waves, offering opportunities in areas such as holographic rendering, sound absorption, and acoustic communication. Despite the steady progress made in this field, most acoustic metasurface designs are passive in that they only provide static functionalities. Here, a reconfigurable active acoustic metalens is implemented to showcase scanning of the focus along arbitrary trajectories in free space with the help of a previously developed active acoustic metasurface platform. Each unit cell of the metasurface contains a cavity, whose size can be tuned continuously by a dynamic control system to adjust the phase of the reflected wave. While this work focuses on beam focusing, it could hold great promise for a wide range of applications including acoustic levitation and tweezers.

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Work Title A reconfigurable active acoustic metalens
Access
Open Access
Creators
  1. Cheng Zhang
  2. Wen Kang Cao
  3. Li Ting Wu
  4. Jun Chen Ke
  5. Yun Jing
  6. Tie Jun Cui
  7. Qiang Cheng
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Applied Physics Letters
Publication Date March 29, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1063/5.0045024
Deposited July 15, 2021

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Version 1
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  • Created
  • Added A_reconfigurable_active_acoustic_metalens.pdf
  • Added Creator Cheng Zhang
  • Added Creator Wen Kang Cao
  • Added Creator Li Ting Wu
  • Added Creator Jun Chen Ke
  • Added Creator Yun Jing
  • Added Creator Tie Jun Cui
  • Added Creator Qiang Cheng
  • Published
  • Updated
  • Updated