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Coherent amplification in laser cooling and trapping

By Tim Freegarde, Geoff Daniell and Danny Segal

Abstract

The optical scattering force, behind Doppler cooling and magneto-optical trapping, may be amplified without incurring additional spontaneous emission by the state-dependent coherent deflection produced by a pulsed or chirped laser field. At some cost in experimental complexity, amplified forces allow efficient cooling on narrow transitions and permit the compact deceleration of beams with reduced transverse heating, and will be of interest for molecules and atoms with open level schemes where losses following spontaneous emission would otherwise prevail. We present a general analysis of the amplification scheme, and propose an optimized, dynamic cooling scheme that allows the temperature of a sample to be reduced by around a factor of two per excited state lifetime

Topics: QC
Year: 2006
OAI identifier: oai:eprints.soton.ac.uk:21024
Provided by: e-Prints Soton
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