Two-photon and electromagnetically-induced-transparency-assisted Doppler cooling in a three-level cascade system
Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física)
Arimondo, Ennio (NIST. Laser Cooling and Trapping Group (Gaithersburg, Estats Units d'Amèrica))
American Physical Society

Date:	2007
Abstract:	Laser cooling is theoretically investigated in a cascade three-level scheme, where the excited state of a laser-driven transition is coupled by a second laser to a top, more stable level, as for alkaline-earth-metal atoms. The second laser action modifies the atomic scattering cross section and produces temperatures lower than those reached by Doppler cooling on the lower transition. When multiphoton processes due to the second laser are relevant, an electromagnetic-induced transparency modifies the absorption of the first laser, and the final temperature is controlled by the second laser parameters. When the intermediate state is only virtually excited, the dynamics is dominated by the two-photon process and the final temperature is determined by the spontaneous decay rate of the top state.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Physical review. A, Vol. 75, Issue 5 (May 2007) , p. 051404-1-051404-04, ISSN 1050-2947

DOI: 10.1103/PhysRevA.75.051404

4 p, 121.2 KB

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