Broadband Vibrational Cooling of Cold Cesium Molecules: Theory and Experiments
Authors: Sofikitis D., Fioretti A., Weber S., Viteau M., Chotia A., Horchani R., Allegrini M., Chatel B.,
Comparat D., Pillet P.
Autors Affiliation: Laboratoire Aime Cotton, CNRS, Universite Paris-Sud, Bat. 505, 91405 Orsay, France; Laboratoire Collisions, Agregats, Reactivite (UMR 5589, CNRS-Universite Paul Sabatier Toulouse 3), IRSAMC, Toulouse, France; CNISM, Dipartimento di Fisica, Universita di Pisa, Largo Pontecorvo, 356127 PISA, Italy
Abstract: The use of a broadband, frequency shaped femtosecond laser on translationally cold cesium molecules has recently demonstrated to be a very efficient method of cooling also the vibrational degree of freedom. A sample of cold molecules, initially distributed over several vibrational levels, has thus been transfered into a single selected vibrational level of the singlet. X(1)Sigma(g) ground electronic state. Our method is based on repeated optical pumping by laser light with a spectrum broad enough to excite all populated vibrational levels but limited in its frequency bandwidth with a spatial light modulator. In such a way we are able to eliminate transitions from the selected level, in which molecules accumulate. In this paper we briefly report the main experimental results and then address, in a detailed way by computer simulations, the perspectives for a \”complete\” cooling of the molecules, including also the rotational degree of freedom. Since the pumping process strongly depends on the relative shape of the ground and excited potential curves, ro-vibrational cooling through different excited states is theoretically compared.
Journal/Review: CHINESE JOURNAL OF CHEMICAL PHYSICS
Volume: 22 (2) Pages from: 149 to: 156
KeyWords: Cold molecule; Laser cooling; Optical pumping; Pulse shaping; Ultrashort pulseDOI: 10.1088/1674-0068/22/02/149-156Citations: 4data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2019-10-13References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here