Formation of ultracold molecules via photoassociation with blue detuned laser light
Laboratoire Aimé Cotton, CNRS, bâtiment 505, Campus d'Orsay, 91405 Orsay Cedex, France
2 Institute of Physics, P.O. Box 304, 10000 Zagreb, Croatia
Corresponding author: a firstname.lastname@example.org
Published online: 15 September 2001
We propose a new possibility to form ultracold molecules, via photoassociation of a pair of cold atoms into vibrational levels of the external well of an excited electronic state located at intermediate interatomic distance ( Bohr radii), and embedded in the dissociation continuum above its dissociation limit. The existence of such a well is demonstrated by conventional free-free absorption spectroscopy at thermal energies. Estimation for cold atom photoassociation and cold molecule formation rates are obtained within a perturbative approach [Drag et al., IEEE J. Quant. Electr. 36, 1378 (2000)], and are found observable for usual conditions of photoassociation experiments.
PACS: 32.80.Pj – Optical cooling of atoms; trapping / 34.50.Rk – Laser-modified scattering and reactions / 33.80.Ps – Optical cooling of molecules; trapping
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001