F-resolved Magneto-optical Resonances at D1 Excitation of Cesium: Experiment and Theory

Abstract

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. Experimental 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.

arXiv comment9 pages, 6 figures

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• Cascade coherence transfer and magneto-optical resonances at 455 nm excitation of Cesium
• Magneto-optical spectroscopy with polarization-modulated light
• Level-crossing resonances on open atomic transitions in a buffered Cs vapor cell: Linewidth narrowing, high contrast and applications to atomic magnetometry
• Nonlinear magneto-optical resonances at D1 excitation of 85Rb and 87Rb in an extremely thin cell
• Relaxation mechanisms affecting magneto-optical resonances in an extremely thin cell: experiment and theory for the cesium D${}_1$ line
• Spatial dynamics of laser-induced fluorescence in an intense laser beam: experiment and theory in alkali metal atoms
• Coherent and incoherent processes responsible for various characteristics of nonlinear magneto-optical signals in rubidium atoms
• Ultrahigh-Quality Magneto-Optical Resonances of Electromagnetically Induced Absorption in a Buffer-Gas-Filled Vapor Cell