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F-resolved magneto-optical resonances in the D1 excitation of cesium: Experiment and theory M. Auzinsh,* R. Ferber, F. Gahbauer, A. Jarmola, and L. Kalvans
 

Summary: F-resolved magneto-optical resonances in the D1 excitation of cesium: Experiment and theory
M. Auzinsh,* R. Ferber, F. Gahbauer, A. Jarmola, and L. Kalvans
The University of Latvia, Laser Centre, Rainis Boulevard, LV-1586 Riga, Latvia
Received 10 March 2008; published 23 July 2008
Bright and dark nonlinear magneto-optical resonances associated with the ground state Hanle effect have
been studied experimentally and theoretically for D1 excitation of atomic cesium. This system offers the
advantage that the separation between the different hyperfine levels exceeds the Doppler width, and hence
transitions between individual levels can be studied separately. At the same time, the system retains the
advantages offered by ordinary glass cells, including simplicity and subnatural width Hanle resonances. Ex-
perimental measurements for various laser power densities and transit relaxation times are compared with a
model based on the optical Bloch equations, which averages over the Doppler contour of the absorption line
and simultaneously takes into account all hyperfine levels, as well as mixing of magnetic sublevels in an
external magnetic field. In contrast to previous studies, which could not resolve the hyperfine transitions
because of Doppler broadening, in this study there is excellent agreement between experiment and theory
regarding the sign bright or dark , contrast and width of the resonance. The results support the traditional
theoretical interpretation, according to which these effects are related to the relative strengths of transition
probabilities between different magnetic sublevels in a given hyperfine transition.
DOI: 10.1103/PhysRevA.78.013417 PACS number s : 32.60. i, 32.80.Xx, 32.10.Fn
I. INTRODUCTION
The nonlinear magneto-optical resonances associated with

  

Source: Auzinsh, Marcis - Department of Physics, University of Latvia

 

Collections: Physics