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Time-dependent radiative transfer in magneto-optical traps

Bezuglov, NN; Molisch, Andreas LU ; Fioretti, A; Gabbanini, C; Fuso, F and Allegrini, M (2003) In Physical Review A (Atomic, Molecular and Optical Physics) 68(6: 063415).
Abstract
We investigate radiation-imprisonment (RI) phenomena in a system of cold atoms trapped in magneto-optical traps (MOTs) when cooling lasers are switched off for a short period. The problem is formulated within the framework of the Streater-Cooper-Sandle equation that belongs to the Markov class and accounts for photon frequency redistribution in multiple scattering processes. On the basis of a semiclassical approach, we derive explicit analytical solutions for the spectral problem of the RI equation neglecting Doppler effects. The analysis reveals peculiarities in emission profiles under initial partial saturation of the resonance transition by the probe laser pulse. Comparison between theoretical and experimental data on effective... (More)
We investigate radiation-imprisonment (RI) phenomena in a system of cold atoms trapped in magneto-optical traps (MOTs) when cooling lasers are switched off for a short period. The problem is formulated within the framework of the Streater-Cooper-Sandle equation that belongs to the Markov class and accounts for photon frequency redistribution in multiple scattering processes. On the basis of a semiclassical approach, we derive explicit analytical solutions for the spectral problem of the RI equation neglecting Doppler effects. The analysis reveals peculiarities in emission profiles under initial partial saturation of the resonance transition by the probe laser pulse. Comparison between theoretical and experimental data on effective radiative lifetimes obtained in Cs and Rb MOTs confirms the validity of the discussed nonstationary model of RI in cold samples. For small detunings, the Streater-Cooper-Sandle equation agrees with the experimental data, while in the case of large detunings, the theory does not agree, probably due to non-Markovian effects. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
68
issue
6: 063415
publisher
American Physical Society (APS)
external identifiers
  • wos:000187885000077
  • scopus:1142268036
ISSN
1050-2947
DOI
10.1103/PhysRevA.68.063415
language
English
LU publication?
yes
id
addcc257-9435-4e3a-8c2e-cbb375a9e15e (old id 289955)
date added to LUP
2007-08-23 15:35:46
date last changed
2018-01-07 06:25:06
@article{addcc257-9435-4e3a-8c2e-cbb375a9e15e,
  abstract     = {We investigate radiation-imprisonment (RI) phenomena in a system of cold atoms trapped in magneto-optical traps (MOTs) when cooling lasers are switched off for a short period. The problem is formulated within the framework of the Streater-Cooper-Sandle equation that belongs to the Markov class and accounts for photon frequency redistribution in multiple scattering processes. On the basis of a semiclassical approach, we derive explicit analytical solutions for the spectral problem of the RI equation neglecting Doppler effects. The analysis reveals peculiarities in emission profiles under initial partial saturation of the resonance transition by the probe laser pulse. Comparison between theoretical and experimental data on effective radiative lifetimes obtained in Cs and Rb MOTs confirms the validity of the discussed nonstationary model of RI in cold samples. For small detunings, the Streater-Cooper-Sandle equation agrees with the experimental data, while in the case of large detunings, the theory does not agree, probably due to non-Markovian effects.},
  author       = {Bezuglov, NN and Molisch, Andreas and Fioretti, A and Gabbanini, C and Fuso, F and Allegrini, M},
  issn         = {1050-2947},
  language     = {eng},
  number       = {6: 063415},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Time-dependent radiative transfer in magneto-optical traps},
  url          = {http://dx.doi.org/10.1103/PhysRevA.68.063415},
  volume       = {68},
  year         = {2003},
}