Bevilacqua, Giuseppe Breschi, Evelina 2014-06-18 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. application/pdf https://folia.unifr.ch/global/documents/303771 https://folia.unifr.ch/documents/303771/files/bev_mos.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.89.062507 info:eu-repo/semantics/openAccess License undefined Physical Review A. - 2014, vol. 89, no. 6, p. 062507 info:eu-repo/classification/udc/53 Magneto-optic spectroscopy with linearly polarized modulated light: Theory and experiment http://purl.org/coar/resource_type/c_6501