Features of alkali D₂ line magnetically-induced transitions excited under π-polarized laser radiation

2024/06/21 by A. Sargsyan, Emmanuel Klinger, Sargsyan, A. +5
Physics and Astronomy · #Quantum optics and atomic interactions #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates

paper · pdf · doi:10.48550/arxiv.2406.15607

Abstract

The impact of the optical field polarization on the spectrum of magnetically-induced transitions, a class of transitions forbidden at zero magnetic field, is studied with a weak-probe sub-Doppler technique. The high spectral resolution of the technique combined with the simplicity in interpreting the observed spectra, allows to follow the behavior of individual transitions as a function of the magnetic field amplitude. We observe only one intense transition (out of 2F_g+1, where F is the quantum number associated with the total angular momentum of the atom) in the case of linear (π) polarization (a configuration where the applied magnetic field is parallel to the electric field from the laser radiation) in the F_g→ F_g+2 manifolds of ⁸⁵Rb, ⁸⁷Rb and ¹³³Cs for fields above a few hundreds of gauss. We show that this behavior is in agreement with a model based on the diagonalization of the Zeeman Hamiltonian matrix. With the rapid development of micro-machined vapor-cell-based sensors these results will be of use to magnetometers operating above Earth field, wide-range laser frequency stabilization systems and atomic Faraday filters.

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