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arXiv · 1106.0129

Molecular spectroscopy for ground-state transfer of ultracold RbCs molecules

Markus Debatin·Tetsu Takekoshi·Raffael Rameshan·Lukas Reichsöllner·Francesca Ferlaino·Rudolf Grimm·Romain Vexiau·Nadia Bouloufa·Olivier Dulieu·Hanns-Christoph Naegerl
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Abstract

We perform one- and two-photon high resolution spectroscopy on ultracold samples of RbCs Feshbach molecules with the aim to identify a suitable route for efficient ground-state transfer in the quantum-gas regime to produce quantum gases of dipolar RbCs ground-state molecules. One-photon loss spectroscopy allows us to probe deeply bound rovibrational levels of the mixed excited (A1{\Sigma}+ - b3{\Pi}0) 0+ molecular states. Two-photon dark state spectroscopy connects the initial Feshbach state to the rovibronic ground state. We determine the binding energy of the lowest rovibrational level |v"=0,J"=0> of the X1{\Sigma}+ ground state to be DX 0 = 3811.5755(16) 1/cm, a 300-fold improvement in accuracy with respect to previous data. We are now in the position to perform stimulated two-photon Raman transfer to the rovibronic ground state.

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Markus Debatin, Tetsu Takekoshi, Raffael Rameshan, Lukas Reichsöllner, Francesca Ferlaino, Rudolf Grimm, Romain Vexiau, Nadia Bouloufa, Olivier Dulieu, Hanns-Christoph Naegerl. 2011-06-01. Molecular spectroscopy for ground-state transfer of ultracold RbCs molecules. https://doi.org/10.1039/c1cp21769k

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