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, w_L and 2w_L , 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 w_L and 2w_L 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.
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|Titolo:||Magneto-optic spectroscopy with linearly polarized modulated light: Theory and experiment|
|Citazione:||Bevilacqua, G., & Breschi, E. (2014). Magneto-optic spectroscopy with linearly polarized modulated light: Theory and experiment. PHYSICAL REVIEW A, 89, 062507-1-062507-10.|
|Appare nelle tipologie:||1.1 Articolo in rivista|