Quantum

Adelaide Researchers Develop Optical Spectrometer with Six-Femtometre Resolution

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 10/11/2026, 09:49:24 UTC.

Briefings

Adelaide University researchers developed a speckle-based optical spectrometer achieving six-femtometre resolution, marking the first direct measurement of atomic hyperfine structure using this technique. The device exploits light scattering patterns to measure rubidium's spectral composition, with findings published in Nature Communications. The team includes Gabriel Britto Monteiro, Christopher Perrella, Sarah K. Scholten, Morgan Facchin, Andre N. Luiten, Graham D. Bruce, and Kishan Dholakia, working through the COMBS Centre of Excellence and the University of St Andrews.

Key points

• The team led by Adelaide University successfully measured the hyperfine structure of rubidium using a speckle-based optical spectrometer, achieving a resolution of six femtometres.
• The researchers demonstrated that speckle patterns, typically considered optical noise, can be harnessed to achieve ultra-high-resolution measurements of light's wavelength composition.

Context

This research represents a significant advancement in optical metrology, enabling direct measurement of atomic hyperfine structure. The findings are relevant to quantum technologies, atomic clocks, and environmental monitoring, as the spectrometer's precision allows for the analysis of complex gases and chemical identification.

Limitations

The evidence is limited to a single press release from November 2026, published in Nature Communications. Specific experimental parameters, such as the exact integration sphere dimensions or the precise rubidium sample conditions, are not detailed in the provided text. The team's future plans to combine speckle spectroscopy with optical frequency combs remain unverified.

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