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Bubble-type coding metasurfaces for broadband deep subwavelength underwater acoustic manipulations

We construct a reflective broadband acoustic coding metasurface using bubbles as the unit. The reflected phase difference between the cube bubble unit and the pure water unit is about π over a wide frequency range. The broadband phenomenon could be explained by the reflection theory between the soft...

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Published in:Applied physics express 2023-04, Vol.16 (4), p.45505
Main Authors: Han, Ping, Huang, Zhan-Dong, Dong, Hao-Wen, Zhao, Sheng-Dong
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Language:English
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description We construct a reflective broadband acoustic coding metasurface using bubbles as the unit. The reflected phase difference between the cube bubble unit and the pure water unit is about π over a wide frequency range. The broadband phenomenon could be explained by the reflection theory between the soft water–air interface and the hard water–rigid interface. Its relative bandwidth reaches 187%, close to 200% of the theoretical limit. By reconstructing the 0/1 sequence, we performed numerical simulation on broadband acoustic focusing and diffusing reflection. The research in this work has potential applications in improving the performance of underwater communication and cloaking.
doi_str_mv 10.35848/1882-0786/accc6c
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source Institute of Physics IOP Science Extra; Institute of Physics:Jisc Collections:IOP Publishing Read and Publish 2024-2025 (Reading List)
subjects acoustic manipulations
broadband
bubble
metasurface
title Bubble-type coding metasurfaces for broadband deep subwavelength underwater acoustic manipulations
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