Magneto-optic spectroscopy with linearly polarized modulated light: Theory and experiment

Bevilacqua, Giuseppe; Breschi, Evelina

doi:10.1103/PhysRevA.89.062507

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Journal article

Magneto-optic spectroscopy with linearly polarized modulated light: Theory and experiment

Bevilacqua, Giuseppe Department of Information Engineering and Mathematical Science, University of Siena, Italy
Breschi, Evelina Department of Physics, University of Fribourg, Switzerland

18.06.2014

Published in:

Physical Review A. - 2014, vol. 89, no. 6, p. 062507

English We investigate the polarization modulation between two linear orthogonal states of the laser beam that synchronously pumps time-dependent atomic alignment in caesium atoms exposed to a static magnetic field. Because of the atomic alignment symmetry two independent groups of resonances can be distinguished in the transmitted light: when modulation frequency matches either the Larmor frequency or its second harmonics, ωL and 2ωL, respectively. We report on our experiments, and discuss a model that perfectly reproduces the observed spectra. We have observed that the amplitudes and linewidths of resonances at ωL and 2ωL show magnetic-field direction dependence. This peculiar behavior makes our approach interesting for future application to atomic magnetometry, in view of a dead-zone free high-sensitivity magnetometer.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language