4.6 Article

Super-resolution acoustic image montage via a biaxial metamaterial lens

Journal

SCIENCE BULLETIN
Volume 65, Issue 12, Pages 1022-1029

Publisher

ELSEVIER
DOI: 10.1016/j.scib.2020.03.018

Keywords

Acoustic metamaterials; Super-resolution imaging; Biaxial metamaterials; Montage technique

Funding

  1. National Natural Science Foundation of China [11674119, 11774297, 11690030, 11690032]
  2. General Research Fund (GRF) scheme of Research Grants Council of Hong Kong [PolyU 152119/18E]

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Ever since the Victorian era, montage, the process of pictorial composition made by juxtaposing or super-imposing photographs, has been a very popular post-editing imaging technique. Despite showing a strong power in demonstrating complex wave field effects, this technique has neither been fully explored in acoustic imaging nor been realized in real-time systems with the capability beyond diffraction limits. On the other hand, the recent prospect of metamaterials has shown their great potentials in super-resolution acoustic imaging. However, the miracle jigsaw of more advanced functional modulation of acoustic wave fields at deep subwavelength scale still remains elusive. Here we report the experimental implementation of super-resolution acoustic image montage through a judiciously designed biaxial metamaterial lens. Based on the non-diffraction birefringence in the biaxial metamaterials, we realized various montage functionalities such as duplication, composition, and decomposition of sound images with distinctive deep subwavelength features. Our work represents an important step in developing versatile functional acoustic metamaterial devices for imaging purposes, as it provides on-demand editing of sound field patterns beyond diffraction limits. (C) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.

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