Rostock 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 5: Ultra-cold atoms and molecules II (joint session A/MO/Q)

A 5.1: Vortrag

Montag, 11. März 2019, 14:00–14:15, S HS 1 Physik

Spectroscopic studies on bosonic NaK — •Kai K. Voges, Philipp Gersema, Jannis Schnars, Torsten Hartmann, Torben A. Schulze, Alessandro Zenesini, Eberhard Tiemann, and Silke Ospelkaus — Institut für Quantenoptik, Universität Hannover

With their large electric dipole moments and their rich internal level structures heteronuclear polar ground state molecules yield a rich test bed for a variety of dipolar quantum phenomena.

In our experiment, we aim at the creation of ultracold bosonic ensembles of ground state polar ²³Na³⁹K molecules by means of Feshbach molecule association and subsequent two-photon transfer to rovibrational ground state polar molecules. This is a challenging task which requires detailed knowledge of the molecular level structure both at atomic threshold and at the bottom of the molecular potential.

In this talk we present our spectroscopic investigations on bosonic ²³Na³⁹K molecules. We perform microwave and radio frequency spectroscopy on bound Feshbach states identifying promising candidates for the initial association into shallow-bound states. Furthermore, we perform laser spectroscopy of the electronic excited B¹Π (v=8) and c³Σ (v=30) coupled states. These data allow us to model the excited state manifold and determine the singlet-triplet mixing between these states. Moreover, we perform dark-resonance spectroscopy locating the two lowest lying rotational states in the molecular ground state potential. Finally, we will report on our progress to combine the different spectroscopic results for the creation of an ensemble of rovibrational ground state polar molecules.