Coherent amplification in laser cooling and trapping
Coherent amplification in laser cooling and trapping
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.
033409-[9pp]
Freegarde, Tim
01a5f53b-d406-44fb-a166-d8da9128ea7d
Daniell, Geoff
82c59eea-5002-4889-8823-2c6e5b3288d3
Segal, Danny
7eae184b-92b2-49f5-a189-99236eb31eb7
7 March 2006
Freegarde, Tim
01a5f53b-d406-44fb-a166-d8da9128ea7d
Daniell, Geoff
82c59eea-5002-4889-8823-2c6e5b3288d3
Segal, Danny
7eae184b-92b2-49f5-a189-99236eb31eb7
Freegarde, Tim, Daniell, Geoff and Segal, Danny
(2006)
Coherent amplification in laser cooling and trapping.
Physical Review A, 73 (2006), .
(doi:10.1103/PhysRevA.73.033409).
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.
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Published date: 7 March 2006
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Local EPrints ID: 21024
URI: http://eprints.soton.ac.uk/id/eprint/21024
ISSN: 1050-2947
PURE UUID: 13745172-1db1-4ee2-b7cb-b0492ca17b80
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Date deposited: 09 Mar 2006
Last modified: 16 Mar 2024 03:35
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Author:
Geoff Daniell
Author:
Danny Segal
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