Reflection of thermal atoms by a pulsed standing wave |
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Authors: | P. Ryytty M. Kaivola |
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Affiliation: | (1) Department of Engineering Physics and Mathematics, Helsinki University of Technology, 02015 HUT, Finland, FI |
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Abstract: | Reflection of thermal atoms by a pulsed standing wave with a duration in the nanosecond range is studied. The momentum distribution of the reflected atoms is determined by calculations based on the adiabatic atom-photon interactions. It is shown that with a proper choice of the field intensity and the pulse duration the standing-wave pattern functions as a row of independent atom mirrors. At an optimum choice of the parameter values, the fraction of the elastically reflected atoms is more than 20%. Furthermore, we show that the pulsed standing-wave mirror can be used to manipulate their final momentum distribution. When using laser pulses with an intensity of several tens of MW/cm2, tens of thousands of atoms can be reflected by a single laser pulse. Received 3 December 1999 and Received in final form 25 April 2000 |
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Keywords: | PACS. 32.80.Lg Mechanical effects of light on atoms molecules and ions |
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