Scientific Results

Photoionization spectroscopy of excited states of cold caesium dimers

Year: 2010

Authors: Bouloufa N., Favilla E., Viteau M., Chotia A., Fioretti A., Gabbanini C., Allegrini M., Aymar M., Comparat D., Dulieu O., Pillet P.

Autors Affiliation: Laboratoire Aimé Cotton, Bât. 505, CNRS, Université Paris-Sud 11 , 91405 Orsay Cedex, France; Istituto Nazionale di Ottica, INO-CNR, U.O.S. Pisa \”Adriano Gozzini\” via Moruzzi 1, 56124 Pisa, Italy; CNISM, Dipartimento di Fisica , Università di Pisa , Largo B. Pontecorvo, 56127 Pisa, Italy

Abstract: Photoionization spectroscopy of cold caesium dimers obtained by photoassociation of cold atoms in a magneto-optical trap is reported here. In particular, we report on the observation and on the spectroscopic analysis of all the excited states that have actually been used for efficient detection of cold molecules stabilized in the triplet

ground state. They are: the state connected to the 6s + 6p asymptote, the and (2)3g states connected to the 6s + 5d asymptote and finally the state connected to the 6s + 7s asymptote. The detection through these states spans a wide range of laser energies, from 8000 to 16,500 cm-1, obtained with different laser dyes and techniques. Information on the initial distribution of cold molecules among the different vibrational levels of the ground state is also provided. This spectroscopic knowledge is important when conceiving schemes for quantum manipulation, population transfer and optical detection of cold caesium molecules.


Volume: 108 (18)      Pages from: 2355  to: 2368

More Information: This work is supported in Orsay by the Institut Francilien de Recherche sur les Atomes Froids (IFRAF). This work is also partially supported by the network \’Quantum Dipolar Molecules (QuDipMol)\’ of the EUROQUAM framework of the European Science Foundation (ESF). A.F. has been supported by the \’Triangle de la Physique\’ under contracts 2007-n.74T and 2009-035T \’GULFSTREAM\’. M.A. thanks the EC-Network EMALI, the \’Universite Franco-Italienne (Galileo Project) and the partnership between University of Paris-Sud and the University of Pisa (COGITO).
KeyWords: cold molecules; diatomic molecules; laser cooling; molecular spectroscopy
DOI: 10.1080/00268976.2010.495732

Citations: 11
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