journal article·2021-11-10

Lotus Metasurface for Wide-Angle Intermediate-Frequency Water–Air Acoustic Transmission

Zhandong Huang, Zhipeng Zhao, Shengdong Zhao, Xiaobing Cai, Yiyuan Zhang, Zheren Cai, Huizeng Li, Zheng Li, Meng Su, Chuanzeng Zhang, Yaozong Pan, Yanlin Song, Jun Yang

ACS Applied Materials & Interfaces· Volume 13· Issue 44
Publisher page

Abstract

Only 0.1% of the acoustic energy can transmit across the water-air interface because of the huge acoustic impedance mismatch. Enhancing acoustic transmission across the water-air interface is of great significance for sonar communications and sensing. However, due to the interface instability and subwavelength characteristics of acoustic metamaterials, wide-angle intermediate-frequency (10 kHz-100 kHz) water-air acoustic transmission remains a great challenge. Here, we demonstrate that the lotus leaf is a natural low-cost acoustic transmission metasurface, namely, the lotus acoustic metasurface (LAM). Experiments demonstrate the LAM can enhance the acoustic transmission across the water-air interface, with an energy transmission coefficient of about 40% at 28 kHz. Furthermore, by fabricating artificial LAMs, the operating frequencies can be flexibly adjusted. Also, the LAM allows a wide-angle water-to-air acoustic transmission. It will enable various promising applications, such as detecting and imaging underwater objects from the air, communicating between ocean and atmosphere, reducing ocean noises, etc.
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Research context

OpenAlex topics: Acoustic Wave Phenomena Research · Underwater Acoustics Research · Aerodynamics and Acoustics in Jet Flows

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

Affiliations

Department of Mechanical and Materials Engineering, the University of Western Ontario, London, Ontario N6A 5B9, Canada

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

School of Mathematics and Statistics, Qingdao University, Qingdao 266071, P. R. China

Institute of Mechanics for Multifunctional Materials and Structures, Qingdao University, Qingdao 266071, P. R. China

Department of Civil Engineering, University of Siegen, D-57068 Siegen, Germany

Qingdao Branch of Institute of Acoustics, Chinese Academy of Sciences, Qingdao 266114, P. R. China

Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen 518000, P. R. China

Funding

Ministry of Science and Technology of the People's Republic of China · Western University · K. C. Wong Education Foundation · China Postdoctoral Science Foundation · Youth Innovation Promotion Association of the Chinese Academy of Sciences · Natural Sciences and Engineering Research Council of Canada · National Natural Science Foundation of China · Beijing Nova Program · Beijing National Laboratory for Molecular Sciences

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