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arXiv · 1606.09411

Role of dressed-state interference in electromagnetically induced transparency

Sumanta Khan·Vineet Bharti·Vasant Natarajan
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Abstract

Electromagnetically induced transparency (EIT) in three-level systems uses a strong control laser on one transition to modify the absorption of a weak probe laser on a second transition. The control laser creates dressed states whose decay pathways show interference. We study the role of dressed-state interference in causing EIT in the three types of three-level systems -- lambda ($Λ$), ladder ($Ξ$), and vee (V). In order to get realistic values for the linewidths of the energy levels involved, we consider appropriate hyperfine levels of $^{87}$Rb. For such realistic systems, we find that dressed-state interference causes probe absorption---given by the imaginary part of the susceptibility---to go to zero in a $Λ$ system, but plays a negligible role in $Ξ$ and V systems.

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Sumanta Khan, Vineet Bharti, Vasant Natarajan. 2016-11-04. Role of dressed-state interference in electromagnetically induced transparency. https://doi.org/10.1016/j.physleta.2016.10.030

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