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Dual-comb optomechanical spectroscopy

Author

Listed:
  • Xinyi Ren

    (East China Normal University)

  • Jin Pan

    (East China Normal University)

  • Ming Yan

    (East China Normal University
    Chongqing Institute of East China Normal University
    Guangyang Bay Laboratory)

  • Jiteng Sheng

    (East China Normal University
    Shanxi University)

  • Cheng Yang

    (East China Normal University)

  • Qiankun Zhang

    (East China Normal University)

  • Hui Ma

    (East China Normal University)

  • Zhaoyang Wen

    (East China Normal University)

  • Kun Huang

    (East China Normal University)

  • Haibin Wu

    (East China Normal University
    Shanxi University
    Shanghai Research Center for Quantum Sciences
    Hefei National Laboratory)

  • Heping Zeng

    (East China Normal University
    Chongqing Institute of East China Normal University
    Guangyang Bay Laboratory
    Jinan Institute of Quantum Technology)

Abstract

Optical cavities are essential for enhancing the sensitivity of molecular absorption spectroscopy, which finds widespread high-sensitivity gas sensing applications. However, the use of high-finesse cavities confines the wavelength range of operation and prevents broader applications. Here, we take a different approach to ultrasensitive molecular spectroscopy, namely dual-comb optomechanical spectroscopy (DCOS), by integrating the high-resolution multiplexing capabilities of dual-comb spectroscopy with cavity optomechanics through photoacoustic coupling. By exciting the molecules photoacoustically with dual-frequency combs and sensing the molecular-vibration-induced ultrasound waves with a cavity-coupled mechanical resonator, we measure high-resolution broadband ( > 2 THz) overtone spectra for acetylene gas and obtain a normalized noise equivalent absorption coefficient of 1.71 × 10−11 cm−1·W·Hz−1/2 with 30 GHz simultaneous spectral bandwidth. Importantly, the optomechanical resonator allows broadband dual-comb excitation. Our approach not only enriches the practical applications of the emerging cavity optomechanics technology but also offers intriguing possibilities for multi-species trace gas detection.

Suggested Citation

  • Xinyi Ren & Jin Pan & Ming Yan & Jiteng Sheng & Cheng Yang & Qiankun Zhang & Hui Ma & Zhaoyang Wen & Kun Huang & Haibin Wu & Heping Zeng, 2023. "Dual-comb optomechanical spectroscopy," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40771-3
    DOI: 10.1038/s41467-023-40771-3
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    References listed on IDEAS

    as
    1. Thibault Wildi & Thibault Voumard & Victor Brasch & Gürkan Yilmaz & Tobias Herr, 2020. "Photo-acoustic dual-frequency comb spectroscopy," Nature Communications, Nature, vol. 11(1), pages 1-6, December.
    2. Jacob T. Friedlein & Esther Baumann & Kimberly A. Briggman & Gabriel M. Colacion & Fabrizio R. Giorgetta & Aaron M. Goldfain & Daniel I. Herman & Eli V. Hoenig & Jeeseong Hwang & Nathan R. Newbury & E, 2020. "Dual-comb photoacoustic spectroscopy," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
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