Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 34: Cold Molecules II
Q 34.6: Talk
Wednesday, March 16, 2011, 15:45–16:00, BAR Schön
Microwave lens: Focusing properties and potential losses — •Simon Merz1, Claudia Brieger1, Gerard Meijer1, and Melanie Schnell2 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin — 2Max-Planck Advanced Study Group at CFEL, D-22607 Hamburg
To manipulate the motion of polar molecules in high-field-seeking states, which is important for molecules in their ground states and for basically all larger and more complex molecules, time-dependent methods such as AC focusing and trapping and alternating-gradient (AG) deceleration have to be employed. Besides electric fields, electromagnetic radiation can be used, such as laser and microwave fields.
We have recently demonstrated a microwave lens for polar molecules in high-field-seeking states [1] that can be used to focus molecules. We investigated the focusing properties as a function of the microwave mode structure, the microwave input power, the detuning and the molecules’ velocity, and also studied some potential loss mechanisms. A detailed understanding is necessary for future experiments on microwave deceleration and trapping using an open Fabry-Pérot type resonator.
[1] H. Odashima et al. Microwave Lens for Polar Molecules. Phys. Rev. Lett., 104:253001, 2010