Berlin 2001 – scientific programme

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Q: Quantenoptik

Q 17: Poster: Cooling and Trapping

Q 17.7: Poster

Wednesday, April 4, 2001, 12:30–15:00, AT2

A strongly confining dipole trap for Rubidium atoms — •Matthias Schulz, Michael Chwalla, Jürgen Eschner, and Rainer Blatt — Institut für Experimentalphysik, Universität Innsbruck, A-6020 Innsbruck, AUSTRIA

Rubidium atoms are accumulated in a conventional MOT and transferred into a dipole trap produced by a 1 W Ti:Sapphire laser which is tuned to 810 nm and focused to a waist of about 15 µm. We achieve trapping frequencies above the recoil frequency, such that the Lamb-Dicke regime of cooling can be reached, and we observe trap lifetimes of several seconds. We report about the experimental setup and the characterization of the trap. We also present the first steps towards a blue-detuned trap consisting of two crossed hollow laser beams.