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arXiv · 1307.6394

Faraday and Cotton-Mouton Effects of Helium at $λ= 1064$ nm

Agathe Cadène·Delphine Sordes·Paul Berceau·Mathilde Fouché·Remy Battesti·Carlo Rizzo
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Abstract

We present measurements of the Faraday and the Cotton-Mouton effects of helium gas at $λ=~1064$\,nm. Our apparatus is based on an up-to-date resonant optical cavity coupled to longitudinal and transverse magnetic fields. This cavity increases the signal to be measured by more than a factor of 270\,000 compared to the one acquired after a single path of light in the magnetic field region. We have reached a precision of a few percent both for Faraday effect and Cotton-Mouton effect. Our measurements give for the first time the experimental value of the Faraday effect at $λ$=\,1064\,nm. This value is compatible with the theoretical prediction. Concerning Cotton-Mouton effect, our measurement is the second reported experimental value at this wavelength, and the first to agree at better than 1$σ$ with theoretical predictions.

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Agathe Cadène, Delphine Sordes, Paul Berceau, Mathilde Fouché, Remy Battesti, Carlo Rizzo. 2013-07-24. Faraday and Cotton-Mouton Effects of Helium at $λ= 1064$ nm. https://doi.org/10.1103/physreva.88.043815

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