Dual-Axis Hanle Magnetometer Based on Atomic Alignment with a Single Optical Access

Gal, G. Le; Lieb, Gaëtan; Beato, François; Jager, T.; Gilles, H.; Palacios-Laloy, Agustin

doi:10.1103/physrevapplied.12.064010

Cited by 24 publications

(2 citation statements)

References 34 publications

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“…These dark and bright Hanle resonances are also known as the Hanle electromagnetically induced transparency and absorption [4]. The Hanle effect is extensively used for sensitive measurement of weak magnetic fields [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Double Hanle resonance dependence on light polarization angle and transverse magnetic field direction

Kumari,

Mehta,

Singh Grewal

et al. 2024

J. Opt.

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We present experimental and theoretical investigations of the dependence of double Hanle resonance spectrum on the light polarization angle and the direction of the applied transverse magnetic field (TMF). The experiments are done for F g = 2 → F e = 1 transition of 87Rb D1 line using a rubidium vapor cell containing buffer gas. We show that a small light polarization component along the direction of TMF introduces asymmetry in the double Hanle resonance signal. Both the magnitude and sign of asymmetry in the signal are sensitive to the TMF orientation, suggesting a possible method for in-situ measurement of the direction of the magnetic fields generated by the coils. The physical origin of this asymmetry is explained by considering the redistribution of population among the ground-state Zeeman sublevels in the presence of TMF. In addition, we systematically vary both the polarization angle and TMF direction to study their effect on the line profile of Hanle resonances. We demonstrate that a double Hanle resonance changes to a dark Hanle resonance by rotating the light polarization vector irrespective of the TMF direction. We have developed a simple theoretical model based on a degenerate two-level system to explain our experimental observations.

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Section: Introductionmentioning

confidence: 99%

Double Hanle resonance dependence on light polarization angle and transverse magnetic field direction

Kumari,

Mehta,

Singh Grewal

et al. 2024

J. Opt.

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“…1(b)] and read through paramagnetic resonance, i.e., nondispersive measurement. This kind of state allows a vector magnetometer operation using radio-frequency fields [20] or, as it was proposed more recently [21], adopting an all-optical approach which performs a dual axis magnetometer based on the Hanle effect. On the other hand, in Ref.…”

Section: Introductionmentioning

confidence: 99%

Floquet description of optically pumped magnetometers

Florez

Pyragius

2021

Phys. Rev. A

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We present a theoretical description of the Voigt and Faraday effect based optically pumped magnetometers using the Floquet expansion. Our analysis describes the spin-operator dynamics of the first-F (t ) and second-orderF 2 (t ) moments and takes into account different pumping profiles and decoherence effects. We find that the theoretical results are consistent with previous experimental demonstrations over a wide range of fields and pumping conditions. Finally, the theoretical analysis presented here is generalized and can be extended to different magnetometry schemes with arbitrary pumping profiles and multiple radio-frequency fields.

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