Molecular spectroscopy for ground-state transfer of ultracold RbCs molecules

by M. Debatin, T. Takekoshi, R. Rameshan, L. Reichsöllner, F. Ferlaino, R. Grimm, R. Vexiau, N. Bouloufa, O. Dulieu, H.-C. Nägerl
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[capital Sigma]+ – b3[capital Pi])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[prime or minute][prime or minute] = 0, J[prime or minute][prime or minute] = 0? of the X1[capital Sigma]+ ground state to be DX0 = 3811.5755(16) cm-1, 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.
Reference:
Molecular spectroscopy for ground-state transfer of ultracold RbCs molecules,
M. Debatin, T. Takekoshi, R. Rameshan, L. Reichsöllner, F. Ferlaino, R. Grimm, R. Vexiau, N. Bouloufa, O. Dulieu, H.-C. Nägerl,
Phys. Chem. Chem. Phys., 13, 18926-18935, 2011.
Bibtex Entry:
@article{C1CP21769K,
  title = {Molecular spectroscopy for ground-state transfer of ultracold RbCs molecules},
  author = {Debatin, M. and Takekoshi, T. and Rameshan, R. and Reichsöllner, L. and Ferlaino, F. and Grimm, R. and Vexiau, R. and Bouloufa, N. and Dulieu, O. and Nägerl, H.-C.},
  journal = {Phys. Chem. Chem. Phys.},
  volume = {13},
  issue = {420}, 
  pages = {18926-18935},
  year = {2011},
  month = {Jun},
  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[capital Sigma]+ - b3[capital Pi])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[prime or minute][prime or minute] = 0{,} J[prime or minute][prime or minute] = 0? of the X1[capital Sigma]+ ground state to be DX0 = 3811.5755(16) cm-1, 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.},
  publisher = {The Royal Society of Chemistry},  
  doi = {10.1039/C1CP21769K},
  url = {http://dx.doi.org/10.1039/C1CP21769K},
  arXiv = {http://arxiv.org/abs/1106.0129}
}