In-situ ac Stark shift Detection in Light Storage Spectroscopy
arXiv:2010.11513 · doi:10.1088/1361-6455/ac2001
Abstract
We report on a method for measuring ac Stark shifts observed in stored light experiments while simultaneously determining the energetic splitting between the electronic ground states involved in the two-photon transition. To this end we make use of the frequency matching effect in light storage spectroscopy. We find a linear dependence on the intensity of the control field applied during the retrieval phase of the experiment. At the same time, we observe that the light shift is insensitive to the intensity of the signal field which is in contrast to continuously operated schemes using electromagnetically induced transparency (EIT) or coherent population trapping (CPT). Our results may be of importance for future light storage-based precision measurements with EIT and CPT-type devices where, in contrast to schemes using continuous exposure to optical fields, the impact of intensity fluctuations from the signal field can be suppressed.
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