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Exceptional energy harvesting from coupled bound states

Author

Listed:
  • Felix Kronowetter

    (Department of Engineering Physics and Computation, TUM School of Engineering and Design, Technical University of Munich
    University of New South Wales
    University of Technology Sydney)

  • Anton Melnikov

    (Bosch Sensortec)

  • Marcus Maeder

    (Department of Engineering Physics and Computation, TUM School of Engineering and Design, Technical University of Munich)

  • Tao Yang

    (Department of Engineering Physics and Computation, TUM School of Engineering and Design, Technical University of Munich)

  • Yan Kei Chiang

    (University of New South Wales)

  • Sebastian Oberst

    (University of Technology Sydney)

  • David A. Powell

    (University of New South Wales)

  • Steffen Marburg

    (Department of Engineering Physics and Computation, TUM School of Engineering and Design, Technical University of Munich)

Abstract

Sustainable and affordable energy is one of the most critical issues facing society. Noise is ubiquitous, albeit with a low energy density, making it an almost perfect energy source. Bound states in the continuum overcome this problem through a highly localized energy increase. Here, we present theoretical, numerical, and experimental studies on bound state acoustic harvesters. Under white noise excitation, the bound state harvester outperforms the conventional Helmholtz resonator harvester by a factor of 2.2 in terms of amplitude spectral density of the output voltage and by a factor of 10 in terms of output power. A super-bound state is formed by using pressure coupling in a pseudo-free field environment, further increasing the energy enhancement. This results in a 50-fold increase in output voltage compared to a single bound state harvester. Our findings advance the state-of-the-art in sustainable energy harvesting for low-power devices.

Suggested Citation

  • Felix Kronowetter & Anton Melnikov & Marcus Maeder & Tao Yang & Yan Kei Chiang & Sebastian Oberst & David A. Powell & Steffen Marburg, 2025. "Exceptional energy harvesting from coupled bound states," Nature Communications, Nature, vol. 16(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-58831-1
    DOI: 10.1038/s41467-025-58831-1
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