Self-generated cooperative light emission induced by atomic recoil

J Javaloyes, M Perrin, G L Lippi, A Politi

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Abstract

The interaction of an atomic gas confined inside a cavity containing a strong electromagnetic field is numerically and theoretically investigated in a regime where recoil effects are not negligible. The spontaneous appearance of a density grating (atomic bunching) accompanied by the onset of a coherent, back-propagating electromagnetic wave is found to be ruled by a continuous phase transition. Numerical tests allow us to convincingly prove that the transition is steered by the appearence of a periodic atomic density modulation. Consideration of different experimental relaxation mechanisms induces us to analyze the problem in nearly analytic form, in the large detuning limit, using both a Vlasov approach and a Fokker-Planck description. The application of our predictions to recent experimental findings, reported by Kruse [Phys. Rev. Lett., 91 183601 (2003) ], yields a semiquantitative agreement with the observations.

Original languageEnglish
Article number023405
Number of pages10
JournalPhysical Review A
Volume70
Issue number2
DOIs
Publication statusPublished - Aug 2004

Keywords

  • induced resonances
  • 2-level atoms
  • sodium vapor
  • laser
  • gain
  • spectroscopy
  • resonator
  • gratings
  • driven
  • line

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