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Localized topological states beyond Fano resonances via counter-propagating wave mode conversion in piezoelectric microelectromechanical devices

Author

Listed:
  • Jacopo M. Ponti

    (Politecnico di Milano)

  • Xuanyi Zhao

    (Northeastern University)

  • Luca Iorio

    (Politecnico di Milano)

  • Tommaso Maggioli

    (Northeastern University)

  • Marco Colangelo

    (Northeastern University)

  • Benyamin Davaji

    (Northeastern University)

  • Raffaele Ardito

    (Politecnico di Milano)

  • Richard V. Craster

    (Imperial College London
    Imperial College London)

  • Cristian Cassella

    (Northeastern University)

Abstract

A variety of scientific fields like proteomics and spintronics have created a new demand for on-chip devices capable of sensing parameters localized within a few tens of micrometers. Nano and microelectromechanical systems (NEMS/MEMS) are extensively employed for monitoring parameters that exert uniform forces over hundreds of micrometers or more, such as acceleration, pressure, and magnetic fields. However, they can show significantly degraded sensing performance when targeting more localized parameters, like the mass of a single cell. To address this challenge, we present a MEMS device that leverages the destructive interference of two topological radiofrequency (RF) counter-propagating wave modes along a piezoelectric Aluminum Scandium Nitride (AlScN) Su-Schrieffer-Heeger (SSH) interface. The reported MEMS device opens up opportunities for further purposes, including achieving more stable frequency sources for communication and timing applications.

Suggested Citation

  • Jacopo M. Ponti & Xuanyi Zhao & Luca Iorio & Tommaso Maggioli & Marco Colangelo & Benyamin Davaji & Raffaele Ardito & Richard V. Craster & Cristian Cassella, 2024. "Localized topological states beyond Fano resonances via counter-propagating wave mode conversion in piezoelectric microelectromechanical devices," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53925-8
    DOI: 10.1038/s41467-024-53925-8
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    References listed on IDEAS

    as
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