Abstract
We have investigated the dependence of lock-in-demodulated \( {M}_x \)-magnetometer signals on the orientation of the static magnetic field \( {\mathbf{B}}_0 \) of interest. Magnetic resonance spectra for 2400 discrete orientations of \( {\mathbf{B}}_0 \) covering a \( 4\pi \) solid angle have been recorded by a PC-controlled steering and data acquisition system. Off-line fits by previously derived lineshape functions allow us to extract the relevant resonance parameters (shape, amplitude, width, and phase) and to represent their dependence on the orientation of \( {\mathbf{B}}_0 \) with respect to the laser beam propagation direction. We have performed this study for two distinct \( {M}_x \)-magnetometer configurations, in which the rf-field is either parallel or perpendicular to the light propagation direction. The results confirm well the algebraic theoretical model functions. We suggest that small discrepancies are related to hitherto uninvestigated atomic alignment contributions.
This article is part of the topical collection “Enlightening the World with the Laser” - Honoring T. W. Hänsch guest edited by Tilman Esslinger, Nathalie Picqué, and Thomas Udem.
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Acknowledgements
We acknowledge financial support by the Physics Department and the Pool de Recherche of the University of Fribourg as well as by Grant No. 200020_162988 of the Swiss National Science Foundation.
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Colombo, S., Dolgovskiy, V., Scholtes, T., Grujić, Z.D., Lebedev, V., Weis, A. (2018). Orientational Dependence of Optically Detected Magnetic Resonance Signals in Laser-Driven Atomic Magnetometers. In: Meschede, D., Udem, T., Esslinger, T. (eds) Exploring the World with the Laser. Springer, Cham. https://doi.org/10.1007/978-3-319-64346-5_17
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