Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 1: Ultra-cold atoms and molecules I (joint session A/MO/Q)

Q 1.7: Talk

Monday, March 11, 2019, 12:00–12:15, S HS 1 Physik

Improved Setup for Optoelectric Sisyphus Cooling of Formaldehyde Using a Detection Scheme Based on Laser Induced Fluorescence — •Martin Ibrügger, Maximilian Löw, Alexander Prehn, Martin Zeppenfeld, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermannstr. 1, 85748 Garching

Ultracold molecules are ideal systems for the investigation of fundamental physics with applications ranging from quantum simulation over high-precision spectroscopy to ultracold chemistry. We showed in the past that optoelectrical Sisyphus cooling is one of the most promising techniques to provide the high number of molecules and the temperatures required for those applications [1]. We now implemented a new detection scheme for formaldehyde based on laser induced fluorescence (LIF), thereby increasing the signal by up to a factor of 30 compared to the previously used quadrupole mass spectrometer, and furthermore allowing state selective detection of the molecules.

Here, we present the current status of the experiment. In particular, we investigate trap dynamics of individual rotational M-sublevels which were previously hard to resolve. Results are very promising for the development of an improved cooling sequence which will pave the way for exciting applications such as high-precision spectroscopy and collisional studies of trapped formaldehyde.

[1] A. Prehn et al., Phys. Rev. Lett. 116, 063005 (2016).