Bioinspired metagel with broadband tunable impedance matching
Name
sciadv.abb3641.pdf
Description
Published version
Size
932.93 KB
Format
Adobe PDF
Checksum (MD5)
b0ca7ce4f3505ed4bce40f02ad2cf293
Author(s)
Dong, Erqian
Song, Zhongchang
Zhang, Yu
Ghaffari Mosanenzadeh, Shahrzad
He, Qi
Zhao, Xuanhe
Fang, Nicholas X
Date Issued
2020
Journal
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Dong, Erqian, Song, Zhongchang, Zhang, Yu, Ghaffari Mosanenzadeh, Shahrzad, He, Qi et al. 2020. "Bioinspired metagel with broadband tunable impedance matching." Science Advances, 6 (44).
Version
Final published version
Abstract
© 2020 The Authors, some rights reserved. To maximize energy transmission from a source through a media, the concept of impedance matching has been established in electrical, acoustic, and optical engineering. However, existing design of acoustic impedance matching, which extends exactly by a quarter wavelength, sets a fundamental limit of narrowband transmission. Here, we report a previously unknown class of bioinspired metagel impedance transformers to overcome this limit. The transformer embeds a two-dimensional metamaterial matrix of steel cylinders into hydrogel. Using experimental data of the biosonar from the Indo-Pacific humpback dolphin, we demonstrate through theoretical analysis that broadband transmission is achieved when the bioinspired acoustic impedance function is introduced. Furthermore, we experimentally show that the metagel device offers efficient implementation in broadband underwater ultrasound detection with the benefit of being soft and tunable. The bioinspired two-dimensional metagel breaks the length-wavelength dependence, which paves a previously unexplored way for designing next-generation broadband impedance matching devices in diverse wave engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution NonCommercial License 4.0
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DOI of Published Version
https://doi.org/10.1126/SCIADV.ABB3641
