Europhys. Lett.
Volume 74, Number 2, April 2006
Page(s) 254 - 260
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 08 March 2006
Europhys. Lett., 74 (2), pp. 254-260 (2006)
DOI: 10.1209/epl/i2005-10521-4

Self-organization of a laser-driven cold gas in a ring cavity

D. Nagy1, J. K. Asbóth1, 2, P. Domokos1 and H. Ritsch2

1  Research Institute for Solid State Physics and Optics P.O. Box 49, H-1525 Budapest, Hungary
2  Institut für Theoretische Physik, Universität Innsbruck Technikerstraße 25, A-6020 Innsbruck, Austria

received 7 November 2005; accepted 14 February 2006
published online 8 March 2006

A gas of linearly polarizable particles transversely pumped by an off-resonant laser and interacting with the counterpropagating radiation modes of a ring cavity is studied. Depending on the pump intensity and the detunings the gas can form a self-organized density grating that enhances the feeding of the cavity. We investigate the system via a mean-field approach and find the thermodynamic phases of i) uniform distribution, ii) self-organized Bragg lattice, iii) lattice with defects, and iv) instability. The occurrence of these phases as a function of the pump intensity and particle density is fully mapped.

42.50.Vk - Mechanical effects of light on atoms, molecules, electrons, and ions.
42.65.Sf - Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics.
42.50.Pq - Cavity quantum electrodynamics; micromasers.

© EDP Sciences 2006