Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency

Abstract

We observe electromagnetically induced transparency (EIT) on the 5s to 5p transition in a room temperature rubidium vapour cell by coupling the 5p state to a Rydberg state (ns or nd with n=26 to 124). We demonstrate that the narrow line-width of the EIT resonance (2 MHz) allows precise measurement of the d state fine structure splitting, and together with the sensitivity of the Rydberg state to electric fields, we are able to detect transient electric fields produced by the dynamics of charges within the cell. Coherent coupling of Rydberg states via EIT could also be used for cross-phase modulation and photon entanglement.

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References in corpus (3)

• Long-range interactions and entanglement of slow single-photon pulses
• Autler-Townes spectroscopy of the $5S_{1/2}-5P_{3/2}-44D$ cascade of cold ${}^{85}$Rb atoms
• Precise measurement of hyperfine structure in the $5P_{3/2}$ state of ${}^{85}$Rb

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