Competition of dark states: Optical resonances with anomalous magnetic field dependence (original) (raw)

Abstract

A different type of optical resonance has been observed in Doppler-free saturated absorption spectroscopy when the pump beam has elliptical polarization slightly deviating from the ϩ and the probe has Ϫ polarization. An interpretation in terms of competition between two trap states and a dressed-atom model is presented. The observed extreme sensitivity of the resonance frequency to the external magnetic field is attributed to the ''scissors effect'' of the dressed states' crossing point.

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