journal article·2022-06

Negative Refraction Acoustic Lens Based on Elastic Shell Encapsulated Bubbles

Zheren Cai, Shengdong Zhao, Zhandong Huang, Zheng Li, Meng Su, Zeying Zhang, Zhipeng Zhao, Yanlin Song

Advanced Materials Technologies· Volume 7· Issue 6
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Abstract

Abstract Advanced devices for acoustic negative refraction and cloaking can be achieved by utilizing acoustic metamaterials. However, the capacities of acoustic metamaterials often are weakened or even disappear when considering thermoviscous loss and damping, which limits the applications of metamaterials. Here, the negative refraction and acoustic imaging capacity of acoustic metamaterials that are comprised of 2D underwater elastic shell encapsulated bubble arrays numerically and experimentally is verified. The influence of thermoviscous loss and damping in solid structures on imaging is discussed. The transmission loss can be reduced by structural optimization. Accordingly, focusing of the sound emitted by a point source is achieved using a flat metamaterial slab whose effective refractive index is −1, which is promising for underwater acoustic imaging.
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Research context

OpenAlex topics: Acoustic Wave Phenomena Research · Metamaterials and Metasurfaces Applications · Aerodynamics and Acoustics in Jet Flows

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences (ICCAS) Beijing Engineering Research Center of Nanomaterials for Green Printing Technology Beijing National Laboratory for Molecular Sciences (BNLMS) Beijing 100190 P. R. China

University of Chinese Academy of Sciences Beijing 100049 P. R. China

School of Mathematics and Statistics Institute of Mechanics for Multifunctional Materials and Structures Qingdao University Qingdao 266071 P. R. China

Department of Mechanical and Materials Engineering The University of Western Ontario London Ontario N6A5B9 Canada

Funding

National Natural Science Foundation of China · K. C. Wong Education Foundation

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