Influence of magnetic-field inhomogeneity on nonlinear magneto-optical resonances
2006 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 74, no 6, 062717- p.Article in journal (Refereed) Published
In this work, a sensitivity of the rate of relaxation of ground-state atomic coherences to magnetic-field inhomogeneities is studied. Such coherences give rise to many interesting phenomena in light-atom interactions, and their lifetimes are a limiting factor for achieving better sensitivity, resolution, or contrast in many applications. For atoms contained in a vapor cell, some of the coherence-relaxation mechanisms are related to magnetic-field inhomogeneities. We present a simple model describing relaxation due to such inhomogeneities in a buffer-gas-free antirelaxation-coated cell. A relation is given between relaxation rate and magnetic-field inhomogeneities including the dependence on cell size and atomic species. Experimental results, which confirm predictions of the model, are presented. Different regimes, in which the relaxation rate is equally sensitive to the gradients in any direction and in which it is insensitive to gradients transverse to the bias magnetic field, are predicted and demonstrated experimentally.
Place, publisher, year, edition, pages
2006. Vol. 74, no 6, 062717- p.
IdentifiersURN: urn:nbn:se:uu:diva-146651DOI: 10.1103/PhysRevA.74.062717ISI: 000243166700085OAI: oai:DiVA.org:uu-146651DiVA: diva2:399206