Efficient sub-Doppler laser cooling of an Indium atomic beam.
We have realized efficient transverse cooling of an Indium atomic beam by combining optical pumping with a closed cycle UV laser cooling transition at 325.6 nm. The transverse velocity of the atomic beam is reduced to 13.5+/-3.8 cm/s, well below the Doppler cooling limit. The fraction of laser-cooled In atoms is enhanced to 12+/-3 % by optical pumping in the present experiment. It can be scaled up to approach 100% efficiency in cooling, providing high brightness atomic beams for further applications. Our results establish In on the map of elements suitable for applications involving laser cooling.
Kim
Jae-Ihn
JI
Institut für Angewandte Physik, Universität Bonn, 53115 Bonn, Germany. kim@iap.uni-bonn.de
Haubrich
Dietmar
D
Meschede
Dieter
D