The hidden limit in light: intrinsic noise reshaping Brillouin metrology

Leonardo Rossi; Gabriele Bolognini

doi:10.1038/s41377-026-02248-y

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The hidden limit in light: intrinsic noise reshaping Brillouin metrology

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- The hidden limit in light: intrinsic noise reshaping Brillouin metrology
- The hidden limit in light: intrinsic noise reshaping Brillouin metrology
- Light: Science & Applications 2026年15卷第5期页码：1408-1410
- Affiliations：
  
  Consiglio Nazionale delle Ricerche, Bologna 40129, Italy
- Author bio：
  
  Gabriele Bolognini (gabriele.bolognini@cnr.it)
- Funds：
- DOI：10.1038/s41377-026-02248-y
  中图分类号：
- 网络首发：2026-03-03，
  
  纸质出版：2026-05-31
- Accepted：
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Leonardo Rossi, Gabriele Bolognini. The hidden limit in light: intrinsic noise reshaping Brillouin metrology[J]. Light: Science & Applications, 2026,15(5):1408-1410.

Rossi, L. & Bolognini, G. The hidden limit in light: intrinsic noise reshaping Brillouin metrology. Light: Science & Applications, 15, 1408-1410 (2026).
Leonardo Rossi, Gabriele Bolognini. The hidden limit in light: intrinsic noise reshaping Brillouin metrology[J]. Light: Science & Applications, 2026,15(5):1408-1410. DOI： 10.1038/s41377-026-02248-y.

Rossi, L. & Bolognini, G. The hidden limit in light: intrinsic noise reshaping Brillouin metrology. Light: Science & Applications, 15, 1408-1410 (2026). DOI： 10.1038/s41377-026-02248-y.

摘要

Abstract

Spontaneous Brillouin scattering is widely used to probe the mechanical and thermal state of matter

yet it has been assumed to be intrinsically stable. Jin and colleagues overturn this view by showing that spontaneous Brillouin light carries its own thermally driven noise floor. Their framework predicts—and experiments confirm—a universal upper bound of SNR = 1 under ideal detection conditions which can become even more restrictive than the conventional shot-noise limit in practical Brillouin systems. This discovery introduces a new fundamental limit to Brillouin-based sensing

microscopy and metrology.

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references

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