Hannover 2010 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 7: Ultra-Cold Atoms: Manipulation and Detection (with Q)
A 7.4: Vortrag
Dienstag, 9. März 2010, 14:45–15:00, A 320
Collective atom-cavity effects with cold Ytterbium gases. — Matteo Cristiani1, Hannes Gothe1, Tristan Valenzuela1, and •Jürgen Eschner1,2 — 1ICFO - Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain — 2FR Experimentalphysik, Universität des Saarlandes, Campus E2.6, 66123 Saarbrücken
We report results from an experiment aiming at collective dynamics of a cold atomic ensemble coupled to the mode of an ultra-high finesse Fabry-Perot cavity. In our experiment we cool and trap ≈ 106 Yb atoms in a MOT using the 1S0 → 1P1 transition at 399 nm. The cloud temperature is T=2 mK. Around the cloud position we have set up a high finesse cavity with length L=4.74 cm, linewidth κ=2π×60 kHz and finesse F=55000. We study the action of the atomic cloud on the cavity mode and observe a behaviour which indicates the presence of strong collective atom-photon coupling. The effects of the cavity mode on the atomic dynamics (cavity cooling and self-organization) are under investigation.