Comptes Rendus
Photoassociation spectroscopy of ultra-cold long-range molecules
[Spectroscopie par photoassociation d'atomes ultra-froids de molécules de grande élongation]
Comptes Rendus. Physique, Volume 5 (2004) no. 2, pp. 161-169.

La spectroscopie des molécules dites « de grande élongation », pour lesquelles la distance interatomique est considérablement plus grande qu'elle ne l'est habituellement dans la liaison chimique peut être réalisée par photoassociation d'atomes ultra-froids. Nous présentons ici une synthèse des résultats obtenus par spectroscopie de photoassociation à un et à deux photons pour la molécules de Cs2. Les potentiels excités concernés sont les potentiels 0g et 1u, corrélés à la limite asymptotique (6s+6p3/2). Tous les résultats obtenus ont été interprétés dans une approche théorique asymptotique, spécialement développée pour l'étude de ces molécules de grande élongation.

Spectroscopic study of so-called long-range molecules, with average interatomic distances much larger than usual for chemical bonds, is conveniently performed by photoassociation (PA) of ultracold atoms. We present here a review of our results obtained by one and two-photon PA spectroscopy of the Cs2 molecule, using as intermediate the 0g and 1u potentials correlated to the (6s+6p3/2) asymptote. These results have been interpreted using an asymptotic theoretical approach, which was specifically build for such long-range molecules.

Publié le :
DOI : 10.1016/j.crhy.2004.01.018
Keywords: Photoassociation, Laser cooling, Atom trapping, Spectroscopy, Asymptotic potential, Long-range molecules, Cesium, Hyperfine structure
Mot clés : Photoassociation, Refroidissement laser, Piégeage d'atomes, Spectroscopie, Potentiel asymptotique, Molécules de grande élongation, Césium, Structure hyperfine

Nicolas Vanhaecke 1 ; Daniel Comparat 1 ; Anne Crubellier 1 ; Pierre Pillet 1

1 Laboratoire Aimé Cotton, CNRS II, bâtiment 505, campus d'Orsay, 91405 Orsay cedex, France
@article{CRPHYS_2004__5_2_161_0,
     author = {Nicolas Vanhaecke and Daniel Comparat and Anne Crubellier and Pierre Pillet},
     title = {Photoassociation spectroscopy of ultra-cold long-range molecules},
     journal = {Comptes Rendus. Physique},
     pages = {161--169},
     publisher = {Elsevier},
     volume = {5},
     number = {2},
     year = {2004},
     doi = {10.1016/j.crhy.2004.01.018},
     language = {en},
}
TY  - JOUR
AU  - Nicolas Vanhaecke
AU  - Daniel Comparat
AU  - Anne Crubellier
AU  - Pierre Pillet
TI  - Photoassociation spectroscopy of ultra-cold long-range molecules
JO  - Comptes Rendus. Physique
PY  - 2004
SP  - 161
EP  - 169
VL  - 5
IS  - 2
PB  - Elsevier
DO  - 10.1016/j.crhy.2004.01.018
LA  - en
ID  - CRPHYS_2004__5_2_161_0
ER  - 
%0 Journal Article
%A Nicolas Vanhaecke
%A Daniel Comparat
%A Anne Crubellier
%A Pierre Pillet
%T Photoassociation spectroscopy of ultra-cold long-range molecules
%J Comptes Rendus. Physique
%D 2004
%P 161-169
%V 5
%N 2
%I Elsevier
%R 10.1016/j.crhy.2004.01.018
%G en
%F CRPHYS_2004__5_2_161_0
Nicolas Vanhaecke; Daniel Comparat; Anne Crubellier; Pierre Pillet. Photoassociation spectroscopy of ultra-cold long-range molecules. Comptes Rendus. Physique, Volume 5 (2004) no. 2, pp. 161-169. doi : 10.1016/j.crhy.2004.01.018. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2004.01.018/

[1] H.R. Thorsheim; J. Weiner; P.S. Julienne Laser-induced photoassociation of ultracold sodium atoms, Phys. Rev. Lett., Volume 58 (1987), p. 2420

[2] J. Weiner; V.S. Bagnato; S. Zilio; P.S. Julienne Experiments and theory in cold and ultracold collisions, Rev. Mod. Phys., Volume 71 (1999), p. 1

[3] W.C. Stwalley; H. Wang Photoassociation of ultracold atoms: a new spectroscopic technique, J. Mol. Spectrosc., Volume 195 (1999), p. 194

[4] P.D. Lett; K. Helmerson; W.D. Philips; L.P. Ratliff; S.L. Rolston; M.E. Wagshul Spectroscopy of Na2 by photoassociation of laser-cooled Na, Phys. Rev. Lett., Volume 71 (1993), p. 2200

[5] J.D. Miller; R.A. Cline; D.J. Heinzen Photoassociation spectrum of ultracold Rb atoms, Phys. Rev. Lett., Volume 71 (1993), p. 2204

[6] E.R.I. Abraham; W.I. McAlexander; C.A. Sackett; R.G. Hulet Spectroscopic determination of the s-wave scattering length of lithium, Phys. Rev. Lett., Volume 74 (1995), p. 1315

[7] H. Wang; P.L. Gould; W.C. Stwalley Photoassociative spectroscopy of ultracold 39K atoms in a high density vapor-cell magneto-optical trap, Phys. Rev. A, Volume 53 (1996), p. R1216

[8] A. Fioretti; D. Comparat; A. Crubellier; O. Dulieu; F. Masnou-Seeuws; P. Pillet Formation of Cs2 cold molecules through photoassociation, Phys. Rev. Lett., Volume 80 (1998), p. 4402

[9] A.P. Mosk; M.W. Reynolds; T.W. Hijmans; J.T.M. Walraven Photoassociation of spin-polarized hydrogen, Phys. Rev. Lett., Volume 82 (1999), p. 307

[10] N. Herschbach; P.J.J. Tol; W. Wassen; W. Hogervorst; G. Woestenenk; J.W. Thomsen; P. Van der Straten; A. Niehaus Photoassociation spectroscopy of cold He(23s) atoms, Phys. Rev. Lett., Volume 84 (2000), p. 1874

[11] J. Léonard; M. Walhout; A.P. Mosk; T. Müller; C. Cohen-Tannoudji; M. Leduc Giant helium dimers produced by photoassociation of ultracold metastable atoms, Phys. Rev. Lett., Volume 91 (2003), p. 073203

[12] G. Zinner; T. Binnewies; F. Riehle; E. Tiemann Photoassociation of cold Ca atoms, Phys. Rev. Lett., Volume 85 (2000) no. 11, p. 2292

[13] J.P. Shaffer; W. Chalupczak; N.P. Bigelow Photoassociative ionization of heteronuclear molecules in a novel two-species magneto-optical trap, Phys. Rev. Lett., Volume 82 (1999) no. 6, p. 1124

[14] U. Schlöder; C. Silber; C. Zimmermann Photoassociation of heteronuclear lithium, Appl. Phys. B, Volume 73 (2001), p. 801

[15] A.J. Kerman; J.M. Sage; S. Sainis; D. DeMille; T. Bergeman Production of ultracold polar RbCs∗ molecules via photoassociation, Phys. Rev. Lett., Volume 92 (2004), p. 033004

[16] A.N. Nikolov; J.R. Enscher; E.E. Eyler; H. Wang; W.C. Stwalley; P.L. Gould Efficient production of ground state potassium molecules at sub-mK temperatures by two-step photoassociation, Phys. Rev. Lett., Volume 84 (2000), p. 246

[17] C.C. Tsai; R.S. Freeland; J.M. Vogels; H.M.J.M. Boesten; J.R. Gardner; D.J. Heinzen; B.J. Verhaar Two-color photoassociation spectroscopy of ground state Rb2, Phys. Rev. Lett., Volume 79 (1997), p. 1245

[18] B. Laburthe Tolra; C. Drag; P. Pillet Observation of cold state-selected cesium molecules formed by stimulated Raman photoassociation, Phys. Rev. A, Volume 64 (2001), p. 61401(R)

[19] J.L. Bohn; P.S. Julienne Semianalytic theory of laser-assisted cold collisions, Phys. Rev. A, Volume 60 (1999) no. 1, p. 414

[20] Ch. Lisdat; N. Vanhaecke; D. Comparat; P. Pillet Line shape analysis of two-colour photoassociation spectra on the example of the Cs2 ground state, Eur. Phys. J. D, Volume 21 (2002), pp. 299-309

[21] W.C. Stwalley; Y. Uang; G. Pichler Pure long-range molecules, Phys. Rev. Lett., Volume 195 (1978), pp. 194-228

[22] P. Pillet; A. Crubellier; A. Bleton; O. Dulieu; P. Nosbaum; I. Mourachko; F. Masnou-Seeuws Photoassociation in a gas of cold alkali atoms. I: Perturbative quantum approach, J. Phys. B, Volume 30 (1997), p. 2801

[23] R. Côté; A. Dalgarno Mechanism for the production of vibrationally excited ultracold molecules of 7Li2, Chem. Phys. Lett., Volume 279 (1997), p. 50

[24] C. Drag; B. Laburthe Tolra; O. Dulieu; D. Comparat; M. Vatasescu; S. Boussen; S. Guibal; A. Crubellier; P. Pillet Experimental versus theoretical rates for photoassociation and for formation of ultracold molecules, IEEE J. Quant. Electron., Volume 36 (2000), p. 1378

[25] C. Drag; B. Laburthe Tolra; B. T'Jampens; D. Comparat; M. Allegrini; A. Crubellier; P. Pillet Photoassociative spectroscopy as a self-sufficient tool for the determination of the cs triplet scattering length, Phys. Rev. Lett., Volume 85 (2000), p. 1408

[26] W.C. Stwalley Expectation values of the kinetic and potential energy of a diatomic molecule, J. Chem. Phys., Volume 58 (1973), p. 3867

[27] R.J. LeRoy; R.B. Bernstein Dissociation energy and long-range potential of diatomic molecules from vibrational spacings of higher levels, J. Chem. Phys., Volume 52 (1970), p. 3869

[28] D. Comparat Improved LeRoy–Bernstein near-dissociation expansion formula, and prospect for photoassociation spectroscopy, J. Chem. Phys., Volume 120 (2004), p. 1318

[29] A. Fioretti; D. Comparat; C. Drag; C. Amiot; O. Dulieu; F. Masnou-Seeuws; P. Pillet Photoassociative spectroscopy of the Cs20g- long-range state, Eur. Phys. J. D, Volume 5 (1999), p. 389

[30] C. Amiot; O. Dulieu; R.F. Gutteres; F. Masnou-Seeuws Determination of the Cs20g-(p3/2) potential curve and the Cs 6p1/2,3/2 atomic radiative lifetimes grom photoassociation spectroscopy, Phys. Rev. A, Volume 66 (2002), p. 052506

[31] E. Tiesinga; C.J. Williams; P.S. Julienne; K.M. Jones; P.D. Lett; W.D. Phillips A spectroscopic determination of scattering lengths for sodium atom collisions, J. Res. Inst. Stand. Technol., Volume 101 (1996), p. 505

[32] D. Comparat; C. Drag; B. Laburthe Tolra; A. Fioretti; P. Pillet; A. Crubellier; O. Dulieu; F. Masnou-Seeuws Formation of cold Cs2 ground state molecules through photoassociation of the 1u long-range state, Eur. Phys. J. D, Volume 11 (2000), p. 59

[33] M. Marinescu; A. Dalgarno Analytical interaction potentials of the long range alkali-metal dimers, Z. Phys. D, Volume 36 (1996), pp. 239-248

[34] H. Weckenmeier; U. Diemer; W. Demtröder; M. Broyer Hyperfine interaction between the singlet and triplet ground states of Cs2: a textbook example of gerade-ungerade symmetry breaking, Chem. Phys. Lett., Volume 124 (1986) no. 4, p. 470

[35] N. Vanhaecke, Ch. Lisdat, B.T'Jampens, D. Comparat, A. Crubelleier, P. Pillet, Accurate asymptotic ground state potential curves of Cs2 from two-colour photoassociation, Eur. Phys. J. D (2004), in press

[36] J.M. Vogels; R.S. Freeland; C.C. Tsai; B.J. Verhaar; D.J. Heinzen Coupled singlet-triplet analysis of two-color cold-atom photoassociation spectra, Phys. Rev. A, Volume 61 (2000), p. 043407

[37] A. Crubellier; O. Dulieu; F. Masnou-Seeuws; M. Elbs; H. Knöckel; E. Tiemann Simple determination of Na2 scattering lengths using observed bound levels at the ground state asymptote, Eur. Phys. J. D, Volume 6 (1999), pp. 211-220

[38] R. Wynar; R.S. Freeland; D.J. Han; C. Ryu; D.J. Heinzen Molecules in a Bose–Einstein condensate, Science, Volume 287 (2000), p. 1016

[39] N. Spiess, Ph.D. thesis, Fachbereich Chemie, Universität Kaiserslautern, 1989

Cité par Sources :

Commentaires - Politique