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Hannover 2010 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 6: Cold Molecules I

MO 6.6: Vortrag

Dienstag, 9. März 2010, 15:30–15:45, F 142

Trapping Molecules on a Chip — •Gabriele Santambrogio1, Samuel A. Meek1, A. Isabel Gonzalez Florez1, Boris G. Sartakov2, Horst Conrad1, and Gerard Meijer11Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin — 2General Physics Institute, Russian Academy of Sciences, Vavilov Street 38, 119991, Moscow, Russia

It has been demonstrated how a microstructured array of electrodes can be used to decelerate and bring the polar molecules to a complete standstill directly from a molecular beam. The electrodes have been configured to generate an array of local minima of electric field strength 25 µm above a glass substrate. Polar molecules in low-field seeking quantum states can be trapped in these traveling potential wells.[1]

The main limiting factor in the number of trapped molecules are non-adiabatic losses from the low-field seeking states. In order to reduce these losses in the case of CO molecules in the a3Π1 state, we are performing two sets of experiments. (i) We take advantage of the hyperfine splitting present in the isotopologue 13CO to lift the degeneracy between low-field seeking states and non-low-field seeking states. (ii) We apply a homogeneous magnetic field to the 12CO molecules to split the low-field and the non-low-field seeking states. Experiments are in progress to quantitatively understand the trap losses due to Majorana transitions (and the reduction thereof) in the combined electric and magnetic fields.

[1] Samuel A Meek, Horst Conrad, and Gerard Meijer, Science 324 (2009), 1699.

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