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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 10 — May. 14, 2007
  • pp: 6019–6035

Self ordering threshold and superradiant backscattering to slow a fast gas beam in a ring cavity with counter propagating pump

C. Maes, J. K. Asbóth, and H. Ritsch  »View Author Affiliations

Optics Express, Vol. 15, Issue 10, pp. 6019-6035 (2007)

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We study the dynamics of a fast gaseous beam in a high Q ring cavity counter propagating a strong pump laser with large detuning from any particle optical resonance. As spontaneous emission is strongly suppressed the particles can be treated as polarizable point masses forming a dynamic moving mirror. Above a threshold intensity the particles exhibit spatial periodic ordering enhancing collective coherent backscattering which decelerates the beam. Based on a linear stability analysis in their accelerated rest frame we derive analytic bounds for the intensity threshold of this selforganization as a function of particle number, average velocity, kinetic temperature, pump detuning and resonator linewidth. The analytical results agree well with time dependent simulations of the N-particle motion including field damping and spontaneous emission noise. Our results give conditions which may be easily evaluated for stopping and cooling a fast molecular beam.

© 2007 Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(270.6630) Quantum optics : Superradiance, superfluorescence

ToC Category:

Original Manuscript: October 23, 2006
Revised Manuscript: April 22, 2007
Manuscript Accepted: April 24, 2007
Published: May 2, 2007

C. Maes, J. K. Asbóth, and H. Ritsch, "Self ordering threshold and superradiant backscattering to slow a fast gas beam in a ring cavity with counter propagating pump," Opt. Express 15, 6019-6035 (2007)

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