Enhancement of level-crossing resonances in rubidium atoms by frequency control of the exciting radiation field

Abstract

We studied magneto-optical resonances caused by excited-state level crossings in a nonzero magnetic field. Experimental measurements were performed on the transitions of the $D_2$ line of rubidium. These measured signals were described by a theoretical model that takes into account all neighboring hyperfine transitions, the mixing of magnetic sublevels in an external magnetic field, the coherence properties of the exciting laser radiation, and the Doppler effect. Good agreement between the experimental measurements and the theoretical model could be achieved over a wide range of laser power densities. We further showed that the contrasts of the level-crossing peaks can be sensitive to changes in the frequency of the exciting laser radiation as small as several tens of megahertz when the hyperfine splitting of the exciting state is larger than the Doppler broadening.

arXiv comment10 pages, 10 figures

References in corpus (4)

• Validity of Rate Equations for Zeeman Coherences for Analysis of Nonlinear Interaction of Atoms with Laser Radiation
• Level-crossing spectroscopy of the 7, 9, and 10D_5/2 states of 133Cs and validation of relativistic many-body calculations of the polarizabilities and hyperfine constants
• Conversion of bright magneto-optical resonances into dark at fixed laser frequency for D2 excitation of atomic rubidium
• Electric Field Induced Symmetry Breaking of Angular Momentum Distribution in Atoms

Cited by in corpus (5)

• Relaxation mechanisms affecting magneto-optical resonances in an extremely thin cell: experiment and theory for the cesium D${}_1$ line
• Angular momentum alignment-to-orientation conversion in the ground state of Rb atoms at room temperature
• 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
• Macroscopic emulation of microscopic magnetic particle systems