We report on a system for atomic beam deceleration and magneto-optical trapping of calcium atoms that uses the <sup>1</sup>S<sub>0</sub>–<sup>1</sup>P<sub>1</sub> transition, in which a single laser is used to trap and slow the atoms. The slower laser beam is focused near the magneto-optical trap’s center, which has a waist size much smaller than the atomic cloud such that its influence on the trapped atoms is greatly reduced. We also investigate the theoretical possibility of cooling by use of a two-photon (4s<sup>2</sup>)<sup>1</sup>S<sub>0</sub>–(4s5s)<sup>1</sup>S<sub>0</sub> transition. Excitation near resonance with the <sup>1</sup>P<sub>1</sub> level results in an equilibrium temperature seven times smaller than the Doppler limit of the <sup>1</sup>S<sub>0</sub>–<sup>1</sup>P<sub>1</sub> transition.
© 2003 Optical Society of America
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.4180) Atomic and molecular physics : Multiphoton processes
(020.7010) Atomic and molecular physics : Laser trapping
Reinaldo L. Cavasso Filho, Wictor C. Magno, Daniela A. Manoel, Artemio Scalabrin, Daniel Pereira, and Flavio C. Cruz, "Deceleration, trapping, and two-photon cooling of calcium atoms," J. Opt. Soc. Am. B 20, 994-1002 (2003)