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A: Fachverband Atomphysik

A 19: Ultracold atoms III: Manipulation and detection / Rydbergatoms (with Q)

A 19.8: Talk

Wednesday, March 4, 2009, 18:15–18:30, Audi-B

Autler-Townes Splitting in an inverted three-level system using Rydberg gases — •Hanna Schempp, Christian Giese, Sebastian Saliba, Thomas Amthor, Christoph S. Hofmann, Brett DePaola, and Matthias Weidemüller — Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg

We investigate coherent excitation phenomena in ultracold Rydberg gases. In a three level Rydberg system Autler-Townes (AT) splitting can be seen by coupling the lower transition and probing the excitation to a Rydberg state [1,2]. The long lifetimes of Rydberg atoms permit us to investigate AT splitting in an inverted Rydberg system, i.e. starting with all atoms in the Rydberg state and stimulating them down to the intermediate state which is split by a strong laser field coupling the intermediate and the ground state. We show the first experimental results and discuss the features of our system.

[1] B. K. Teo et al., Phys. Rev. A 68, 053407 (2003)

[2] J. Deiglmayr et al., Opt. Comm. 264, 293 (2006)