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
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.
Faculté des sciences et de médecine
Département de Physique
  • English
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