Self ordering threshold and superradiant backscattering to slow a fast gas beam in a ring cavity with counter propagating pump
Optics Express, Vol. 15, Issue 10, pp. 6019-6035 (2007)
http://dx.doi.org/10.1364/OE.15.006019
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Abstract
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:
Trapping
History
Original Manuscript: October 23, 2006
Revised Manuscript: April 22, 2007
Manuscript Accepted: April 24, 2007
Published: May 2, 2007
Citation
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)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-10-6019
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