Dresden 2011 – scientific programme
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A: Fachverband Atomphysik
A 23: Ultracold Atoms: Trapping and Cooling 1 (with Q)
A 23.1: Talk
Thursday, March 17, 2011, 14:30–14:45, SCH A118
Experiments on atoms trapped in a two-color-dipole trap — •Rudolf Mitsch1, Daniel Reitz1, Melanie Müller1, Samuel T. Dawkins2, and Arno Rauschenbeutel1 — 1Technische Universität Wien - Atominstitut, Stadionallee 2, A-1020 Wien — 2Johannes Gutenberg-Universität Mainz, AG QUANTUM, D-55099 Mainz
Our recent results on trapping laser-cooled cesium atoms around a subwavelength-diameter optical nanofiber will be presented. The atoms are localized in a dipole trap formed by a two-color evanescent field surrounding the optical nanofiber. The atoms are detected by sending a weak resonant probe beam through the nanofiber that couples to the atoms via the evanescent field. We can observe the light-matter-coupling by either measuring the absorption or the phase shift experienced by the probe light. Furthermore, we demonstrate that the off resonant measurements are non-destructive with respect to the number of trapped atoms. Finally, we present first results on Autler-Townes state splitting and electromagnetically induced transparency.
These results open the route towards the manipulation and storage of light with coherently prepared fiber-coupled atomic ensembles. Potential applications include fiber-coupled quantum memories and quatum repeaters as well as many-body physics with light-matter quasi-particles.
Financial support by the Volkswagen Foundation, the ESF and the FWF Doctoral Programme CoQuS is gratefully acknowledged.