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Realistic prediction and engineering of high-Q modes to implement stable Fano resonances in acoustic devices

Author

Listed:
  • Felix Kronowetter

    (Technical University of Munich
    University of New South Wales
    University of Technology Sydney)

  • Marcus Maeder

    (Technical University of Munich)

  • Yan Kei Chiang

    (University of New South Wales)

  • Lujun Huang

    (University of New South Wales)

  • Johannes D. Schmid

    (Technical University of Munich)

  • Sebastian Oberst

    (University of Technology Sydney)

  • David A. Powell

    (University of New South Wales)

  • Steffen Marburg

    (Technical University of Munich)

Abstract

Quasi-bound states in the continuum (QBICs) coupling into the propagating spectrum manifest themselves as high-quality factor (Q) modes susceptible to perturbations. This poses a challenge in predicting stable Fano resonances for realistic applications. Besides, where and when the maximum field enhancement occurs in real acoustic devices remains elusive. In this work, we theoretically predict and experimentally demonstrate the existence of a Friedrich-Wintgen BIC in an open acoustic cavity. We provide direct evidence for a QBIC by mapping the pressure field inside the cavity using a Laser Doppler Vibrometer (LDV), which provides the missing field enhancement data. Furthermore, we design a symmetry-reduced BIC and achieve field enhancement by a factor of about three compared to the original cavity. LDV measurements are a promising technique for obtaining high-Q modes’ missing field enhancement data. The presented results facilitate the future applications of BICs in acoustics as high-intensity sound sources, filters, and sensors.

Suggested Citation

  • Felix Kronowetter & Marcus Maeder & Yan Kei Chiang & Lujun Huang & Johannes D. Schmid & Sebastian Oberst & David A. Powell & Steffen Marburg, 2023. "Realistic prediction and engineering of high-Q modes to implement stable Fano resonances in acoustic devices," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42621-8
    DOI: 10.1038/s41467-023-42621-8
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    References listed on IDEAS

    as
    1. Lujun Huang & Yan Kei Chiang & Sibo Huang & Chen Shen & Fu Deng & Yi Cheng & Bin Jia & Yong Li & David A. Powell & Andrey E. Miroshnichenko, 2021. "Sound trapping in an open resonator," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    2. E. Alex Wollack & Agnetta Y. Cleland & Rachel G. Gruenke & Zhaoyou Wang & Patricio Arrangoiz-Arriola & Amir H. Safavi-Naeini, 2022. "Quantum state preparation and tomography of entangled mechanical resonators," Nature, Nature, vol. 604(7906), pages 463-467, April.
    3. Riccardo Manenti & Anton F. Kockum & Andrew Patterson & Tanja Behrle & Joseph Rahamim & Giovanna Tancredi & Franco Nori & Peter J. Leek, 2017. "Circuit quantum acoustodynamics with surface acoustic waves," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
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