IDEAS home Printed from https://ideas.repec.org/a/nat/nature/v607y2022i7920d10.1038_s41586-022-04904-w.html
   My bibliography  Save this article

Exceptional-point-based accelerometers with enhanced signal-to-noise ratio

Author

Listed:
  • Rodion Kononchuk

    (Wesleyan University)

  • Jizhe Cai

    (University of Wisconsin-Madison)

  • Fred Ellis

    (Wesleyan University)

  • Ramathasan Thevamaran

    (University of Wisconsin-Madison)

  • Tsampikos Kottos

    (Wesleyan University)

Abstract

Exceptional points (EP) are non-Hermitian degeneracies where eigenvalues and their corresponding eigenvectors coalesce1–4. Recently, EPs have attracted attention as a means to enhance the responsivity of sensors, through the abrupt resonant detuning occurring in their proximity5–20. In many cases, however, the EP implementation is accompanied by noise enhancement, leading to the degradation of the sensor’s performance15–20. The excess noise can be of fundamental nature (owing to the eigenbasis collapse) or of technical nature associated with the amplification mechanisms utilized for the realization of EPs. Here we show, using an EP-based parity–time symmetric21,22 electromechanical accelerometer, that the enhanced technical noise can be surpassed by the enhanced responsivity to applied accelerations. The noise owing to eigenbasis collapse is mitigated by exploiting the detuning from a transmission peak degeneracy (TPD) — which forms when the sensor is weakly coupled to transmission lines — as a measure of the sensitivity. These TPDs occur at a frequency and control parameters for which the biorthogonal eigenbasis is still complete and are distinct from the EPs of the parity–time symmetric sensor. Our device shows a threefold signal-to-noise-ratio enhancement compared with configurations for which the system operates away from the TPD.

Suggested Citation

  • Rodion Kononchuk & Jizhe Cai & Fred Ellis & Ramathasan Thevamaran & Tsampikos Kottos, 2022. "Exceptional-point-based accelerometers with enhanced signal-to-noise ratio," Nature, Nature, vol. 607(7920), pages 697-702, July.
  • Handle: RePEc:nat:nature:v:607:y:2022:i:7920:d:10.1038_s41586-022-04904-w
    DOI: 10.1038/s41586-022-04904-w
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41586-022-04904-w
    File Function: Abstract
    Download Restriction: Access to the full text of the articles in this series is restricted.

    File URL: https://libkey.io/10.1038/s41586-022-04904-w?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Arunn Suntharalingam & Lucas Fernández-Alcázar & Rodion Kononchuk & Tsampikos Kottos, 2023. "Noise resilient exceptional-point voltmeters enabled by oscillation quenching phenomena," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. 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.
    3. Xin Zhou & Xingjing Ren & Dingbang Xiao & Jianqi Zhang & Ran Huang & Zhipeng Li & Xiaopeng Sun & Xuezhong Wu & Cheng-Wei Qiu & Franco Nori & Hui Jing, 2023. "Higher-order singularities in phase-tracked electromechanical oscillators," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    4. Yicheng Zhu & Jiankun Hou & Qi Geng & Boyi Xue & Yuping Chen & Xianfeng Chen & Li Ge & Wenjie Wan, 2024. "Storing light near an exceptional point," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    5. Minye Yang & Liang Zhu & Qi Zhong & Ramy El-Ganainy & Pai-Yen Chen, 2023. "Spectral sensitivity near exceptional points as a resource for hardware encryption," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    6. Weijie Liu & Quancheng Liu & Xiang Ni & Yuechen Jia & Klaus Ziegler & Andrea Alù & Feng Chen, 2024. "Floquet parity-time symmetry in integrated photonics," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    7. Xingwei Gao & Hao He & Scott Sobolewski & Alexander Cerjan & Chia Wei Hsu, 2024. "Dynamic gain and frequency comb formation in exceptional-point lasers," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    8. Jie Li & Fan Zhang & Xiaobin Xia & Kaihang Zhang & Jianhui Wu & Yulu Liu & Chi Zhang & Xinyu Cai & Jiaqi Lu & Liangquan Xu & Rui Wan & Dinku Hazarika & Weipeng Xuan & Jinkai Chen & Zhen Cao & Yubo Li , 2024. "An ultrasensitive multimodal intracranial pressure biotelemetric system enabled by exceptional point and iontronics," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:nature:v:607:y:2022:i:7920:d:10.1038_s41586-022-04904-w. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.