A sensitive and accurate atomic magnetometer based on free spin precession

Grujić, Zoran D.; Koss, Peter A.; Bison, Georg; Weis, Antoine

doi:10.1140/epjd/e2015-50875-3

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Journal article

A sensitive and accurate atomic magnetometer based on free spin precession

Grujić, Zoran D. Physics Department, University of Fribourg, Switzerland
Koss, Peter A. Physics Department, University of Fribourg, Switzerland
Bison, Georg Paul Scherrer Institute, Villigen, Switzerland
Weis, Antoine Physics Department, University of Fribourg, Switzerland

21.05.2015

Published in:

The European Physical Journal D. - 2015, vol. 69, no. 5, p. 1–10

English We present a laser-based atomic magnetometer that allows inferring the modulus of a magnetic field from the free Larmor precession of spin-oriented Cs vapour atoms. The detection of free spin precession (FSP) is not subject to systematic readout errors that occur in phase feedback-controlled magnetometers in which the spin precession is actively driven by an oscillating field or a modulation of light parameters, such as frequency, amplitude, or polarization. We demonstrate that an FSP-magnetometer can achieve a ∼200 fT/√Hz sensitivity (<100 fT/√Hz in the shotnoise limit) and an absolute accuracy at the same level.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language