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Superresolution concentration measurement realized by sub-shot-noise absorption spectroscopy

Author

Listed:
  • Korenobu Matsuzaki

    (Molecular Spectroscopy Laboratory, RIKEN
    Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), RIKEN)

  • Tahei Tahara

    (Molecular Spectroscopy Laboratory, RIKEN
    Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), RIKEN)

Abstract

Absorption spectroscopy is one of the most widely used spectroscopic methods. The signal-to-noise ratio in conventional absorption spectroscopy is ultimately limited by the shot noise, which arises from the statistical property of the light used for the measurement. Here we show that the noise in absorption spectra can be suppressed below the shot-noise limit when entangled photon pairs are used for the light source. By combining broadband entangled photon pairs and multichannel detection, we realize the acquisition of sub-shot-noise absorption spectra in the entire visible wavelength. Furthermore, we demonstrate the strength of sub-shot-noise absorption spectroscopy for the identification and quantification of chemical species, which are two primary aims of absorption spectroscopy. For highly diluted binary mixture solutions, sub-shot-noise absorption spectroscopy enables us to determine the concentration of each chemical species with precision beyond the limit of conventional absorption spectroscopy. That is, sub-shot-noise absorption spectroscopy achieves superresolution in concentration measurements.

Suggested Citation

  • Korenobu Matsuzaki & Tahei Tahara, 2022. "Superresolution concentration measurement realized by sub-shot-noise absorption spectroscopy," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28617-w
    DOI: 10.1038/s41467-022-28617-w
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    References listed on IDEAS

    as
    1. Catxere A. Casacio & Lars S. Madsen & Alex Terrasson & Muhammad Waleed & Kai Barnscheidt & Boris Hage & Michael A. Taylor & Warwick P. Bowen, 2021. "Quantum-enhanced nonlinear microscopy," Nature, Nature, vol. 594(7862), pages 201-206, June.
    2. Catxere A. Casacio & Lars S. Madsen & Alex Terrasson & Muhammad Waleed & Kai Barnscheidt & Boris Hage & Michael A. Taylor & Warwick P. Bowen, 2021. "Author Correction: Quantum-enhanced nonlinear microscopy," Nature, Nature, vol. 596(7873), pages 12-12, August.
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