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Ultrabroadband sound control with deep-subwavelength plasmacoustic metalayers

Author

Listed:
  • Stanislav Sergeev

    (EPFL)

  • Romain Fleury

    (EPFL)

  • Hervé Lissek

    (EPFL)

Abstract

Controlling audible sound requires inherently broadband and subwavelength acoustic solutions, which are to date, crucially missing. This includes current noise absorption methods, such as porous materials or acoustic resonators, which are typically inefficient below 1 kHz, or fundamentally narrowband. Here, we solve this vexing issue by introducing the concept of plasmacoustic metalayers. We demonstrate that the dynamics of small layers of air plasma can be controlled to interact with sound in an ultrabroadband way and over deep-subwavelength distances. Exploiting the unique physics of plasmacoustic metalayers, we experimentally demonstrate perfect sound absorption and tunable acoustic reflection over two frequency decades, from several Hz to the kHz range, with transparent plasma layers of thicknesses down to λ/1000. Such bandwidth and compactness are required in a variety of applications, including noise control, audio-engineering, room acoustics, imaging and metamaterial design.

Suggested Citation

  • Stanislav Sergeev & Romain Fleury & Hervé Lissek, 2023. "Ultrabroadband sound control with deep-subwavelength plasmacoustic metalayers," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38522-5
    DOI: 10.1038/s41467-023-38522-5
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    References listed on IDEAS

    as
    1. Romain Fleury & Dimitrios Sounas & Andrea Alù, 2015. "An invisible acoustic sensor based on parity-time symmetry," Nature Communications, Nature, vol. 6(1), pages 1-7, May.
    2. Jun Mei & Guancong Ma & Min Yang & Zhiyu Yang & Weijia Wen & Ping Sheng, 2012. "Dark acoustic metamaterials as super absorbers for low-frequency sound," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
    3. Bogdan-Ioan Popa & Steven A. Cummer, 2014. "Non-reciprocal and highly nonlinear active acoustic metamaterials," Nature Communications, Nature, vol. 5(1), pages 1-5, May.
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