Self-organization of a laser-driven cold gas in a ring cavityD. 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.
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