Hannover 2010 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 21: Poster I
Q 21.51: Poster
Tuesday, March 9, 2010, 16:00–19:00, Lichthof
Using ultra-high Q bottle microresonators for cold atom cavity quantum electrodynamic experiments — •Danny O’Shea, Christian Junge, Christian Hauswald, Sebastian Nickel, Alexander Rettenmaier, and Arno Rauschenbeutel — QUANTUM, Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz
We describe the active frequency stabilization of a fully tunable whispering-gallery-mode microresonator with an ultra-high quality factor exceeding 3×108 using the Pound-Drever Hall technique. The critically coupled bottle microresonator is stabilized to 8–10% of its linewidth, or 200 kHz rms, in an ambient air environment. This represents an important advancement for our planned cavity quantum electrodynamic experiment with a bottle microresonator coupled to laser-cooled rubidium atoms. We have constructed an apparatus to deliver the atoms to the location of the bottle microresonator using an atomic fountain. The current status of our experiment is presented and we show first results towards the active stabilization of the bottle resonator to an atomic resonance in ultra-high vacuum.
Financial support by the DFG (Research Unit 557), the ESF (EURYI Award), and the Volkswagen Foundation (Lichtenberg Professorship) is gratefully acknowledged.