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arXiv · 2511.18710

Atomic magnetometry based on the ground-state Hanle effect in an elliptically polarized light wave

D. V. Brazhnikov·A. O. Makarov·K. S. Kozlova·A. N. Goncharov
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Abstract

We investigate the ground-state Hanle effect in alkali-metal vapor irradiating by a resonant elliptically polarized light wave. The magneto-optical resonances are observed as a change in the ellipticity parameter of the light wave polarization when scanning the transverse magnetic field near zero. We use a miniature ($\approx\,$$0.125$ cm$^3$) glass cesium vapor cell heated to a relatively low temperature of $\approx\,$$85^\circ$C. Under the current experimental conditions, the sensitivity of magnetic field measurements is limited by a technical noise, reaching $180$ fT/$\surd$Hz in a $200$ Hz bandwidth. The ultimate photon-shot-noise-limited sensitivity of the method is estimated to be $\approx\,$$5$ fT/$\surd$Hz. The proposed scheme is promising for the development of a zero-field atomic magnetometer with reduced heat dissipation of the sensor head and relaxed requirements for magnetic shielding compared to counterparts operating in the spin-exchange relaxation-free regime. These features are of particular value for biomedical applications.

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D. V. Brazhnikov, A. O. Makarov, K. S. Kozlova, A. N. Goncharov. 2025-11-24. Atomic magnetometry based on the ground-state Hanle effect in an elliptically polarized light wave. https://doi.org/10.1140/epjd%2Fs10053-026-01170-7

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