Metasurface for Water-to-Air Sound Transmission

Eun Bok, Jong Jin Park, Haejin Choi, Chung Kyu Han, Oliver B. Wright, Sam H. Lee

Research output: Contribution to journalArticle

18 Citations (Scopus)


Effective transmission of sound from water to air is crucial for the enhancement of the detection sensitivity of underwater sound. However, only 0.1% of the acoustic energy is naturally transmitted at such a boundary. At audio frequencies, quarter-wave plates or multilayered antireflection coatings are too bulky for practical use for such enhancement. Here we present an acoustic metasurface of a thickness of only ∼λ/100, where λ is the wavelength in air, consisting of an array of meta-atoms that each contain a set of membranes and an air-filled cavity. We experimentally demonstrate that such a meta-atom increases the transmission of sound at ∼700 Hz by 2 orders of magnitude, allowing about 30% of the incident acoustic power from water to be transmitted into air. Applications include underwater sonic sensing and communication.

Original languageEnglish
Article number044302
JournalPhysical review letters
Issue number4
Publication statusPublished - 2018 Jan 26

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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  • Cite this

    Bok, E., Park, J. J., Choi, H., Han, C. K., Wright, O. B., & Lee, S. H. (2018). Metasurface for Water-to-Air Sound Transmission. Physical review letters, 120(4), [044302].