Transition from electromagnetically induced transparency to Autler-Townes splitting in cold cesium atoms

Abstract

Electromagnetically induced transparency (EIT) and Aulter-Townes splitting (ATS) are two similar yet distinct phenomena that modify the transmission of a weak probe field through an absorption medium in the presence of a coupling field, featured in a variety of three-level atomic systems. In many applications it is important to distinguish EIT from ATS splitting. We present EIT and ATS spectra in a cold-atom three-level cascade system, involving the 35$S_{1/2}$ Rydberg state of cesium. The EIT linewidth, ${\gamma }_{EIT}$, defined as the full width at half maximum (FWHM), and the ATS splitting, ${\gamma }_{ATS}$, defined as the peak-to-peak distance between AT peak pairs, are used to delineate the EIT and ATS regimes and to characterize the transition between the regimes. In the cold-atom medium, in the weak-coupler (EIT) regime ${\gamma }_{EIT}$ $\approx$ A + B(${\Omega }_c^2$ + ${\Omega }_p^2)/{\Gamma }_{eg}$, where ${\Omega }_c$ and ${\Omega }_p$ are the coupler and probe Rabi frequencies, ${\Gamma }_{eg}$ is the spontaneous decay rate of the intermediate 6P${}_{3/2}$ level, and parameters $A$ and $B$ that depend on the laser linewidth. We explore the transition into the strong-coupler (ATS) regime, which is characterized by the linear relation ${\gamma }_{ATS}$ $\approx$ ${\Omega }_c$. The experiments are in agreement with numerical solutions of the Master equation.

arXiv comment6 pages, 5 figures

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Cited by in corpus (10)

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• Trapped Rydberg ions: a new platform for quantum information processing
• Nature of interference between Autler-Townes peaks in multi-level system
• Spectral splitting of a stimulated Raman transition in a single molecule
• Dephasing of ultracold cesium $80D_{5/2}$-Rydberg Electromagnetically Induced Transparency
• Perspective on electromagnetically induced transparency vs Autler-Townes splitting
• Observation of effects of inter-atomic interaction on Autler-Townes splitting in cold Rydberg atoms