Lensing effect of electromagnetically induced transparency involving a Rydberg state

Abstract

We study the lensing effect experienced by a weak probe field under conditions of electromagnetically induced transparency (EIT) involving a Rydberg state. A Gaussian coupling beam tightly focused on a laser-cooled atomic cloud produces an inhomogeneity in the coupling Rabi frequency along the transverse direction and makes the EIT area acting like a gradient-index medium. We image the probe beam at the position where it exits the atomic cloud, and observe that a red-detuned probe light is strongly focused with a greatly enhanced intensity whereas a blue-detuned one is de-focused with a reduced intensity. Our experimental results agree very well with the numerical solutions of Maxwell-Bloch equations.

7 pages, 4 figures

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• Microwave-assisted Rydberg Electromagnetically induced transparency
• Ion Imaging via Long-Range Interaction with Rydberg Atoms
• Density matrix reconstruction of three-level atoms via Rydberg electromagnetically induced transparency
• Micro lensing induced lineshapes in a single mode cold-atom hollow-core fiber interface
• Phase matching alters spatial multiphoton processes in dense atomic ensembles
• Optimal pulse propagation in an inhomogeneously gas-filled hollow-core fiber
• Nonlinear absorption in interacting Rydberg electromagnetically-induced-transparency spectra on two-photon resonance
• Electromagnetically induced transparency and absorption cross-over with a four-level Rydberg system
• Observation of photon recoil effects in single-beam absorption spectroscopy with an ultracold strontium gas
• Lévy statistics of interacting Rydberg gases