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Chinese Physics Letters

Atomic Motion in a Misaligned Standing-Wave Field

Wang Yuzhu, Liang Liu, Cai Weiquan, Yudan Cheng

Published Jul 1, 1991• 1 citation
Publisher

Abstract

Theoretical and experimental results of laser cooling and laser heating of an atomic beam in a standing-wave field and in a misaligned standing-wave field are reported. The results show that in strong fields, laser heating in a standing-wave field become laser cooling in a misaligned standing-wave field and in weak fields, laser cooling become more efficient in a standing-wave field than in a misaligned standing-wave field.

DOI
10.1088/0256-307x/8/7/002

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Theoretical and experimental results of laser cooling and laser heating of an atomic beam in a standing-wave field and in a misaligned standing-wave field are reported. The results show that in strong fields, laser heating in a standing-wave field become laser cooling in a misaligned standing-wave field and in weak fields, laser cooling become more efficient in a standing-wave field than in a misaligned standing-wave field.
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An atom moving in a strong standing wave radiation field may be translationally cooled by the induced or dipole force.1 The dipole force is proportional to I1/2, where I is the laser intensity, whereas the Doppler (usual) cooling force saturates with increasing I. Since laser sources can provide intensities which are much greater than the saturation intensities of many atomic transitions, cooling via the dipole force can be much more efficient than Doppler cooling. The dipole force has been used to cool the transverse2,3 and the longitudinal4 velocities of atoms in an atomic beam.
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