SUB-RECOIL LASER COOLING WITH PRECOOLED ATOMS

Authors
BARDOU F SAUBAMEA B LAWALL J SHIMIZU K EMILE O WESTBROOK C ASPECT A COHENTANNOUDJI C
Citation
F. Bardou et al., SUB-RECOIL LASER COOLING WITH PRECOOLED ATOMS, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 318(7), 1994, pp. 877-885
Citations number
19
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
318
Issue
7
Year of publication
1994
Part
1
Pages
877 - 885
Database
ISI
SICI code
0764-4450(1994)318:7<877:SLCWPA>2.0.ZU;2-X
Abstract
This Note describes a new realization of sub-recoil laser cooling by V elocity Selective Coherent Population Trapping (VSCPT). Starting from a cloud of trapped and precooled metastable helium atoms, we have been able to increase the VSCPT interaction time by one order of magnitude over the previous experiment. The resulting temperature T is now 20 t imes smaller than the recoil temperature TR associated with the kineti c energy of an atom absorbing or emitting a single photon. The corresp onding temperature is 200 nK and the atomic de Broglie wavelength is 4 .5 mum.