Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 5: Cold Molecules I
MO 5.7: Vortrag
Montag, 18. März 2013, 15:30–15:45, F 107
Reaching for Ultracold Temperatures with Polyatomic Molecules — •Martin Zeppenfeld, Barbara G.U. Englert, Rosa Glöckner, Alexander Prehn, Martin Ibrügger, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
Many of the fascinating applications of cold and ultracold polar molecules require chemically diverse species. Here, optoelectrical Sisyphus cooling [1] presents a unique opportunity to even cool ensembles of polyatomic molecules. Using only a single infrared laser along with additional microwave and radio frequencies, a wide range of molecule species stored in an electric trap [2] can be cooled. As a first result [3], we have achieved a temperature reduction by more than an order of magnitude to 29 mK of about a million CH3F molecules. Present efforts to increase the cooling rate, reduce losses, and increase the number of detected molecules should allow sub-mK temperatures to be achieved with polyatomic molecules for the first time.
[1] M. Zeppenfeld et. al., Phys. Rev. A 80, 041401 (2009).
[2] B.G.U. Englert et al., Phys. Rev. Lett. 107, 263003 (2011).
[3] M. Zeppenfeld et al., Nature 491, 570-573 (2012).