RANDOM LASING IN AN INHOMOGENEOUS AND DISORDERED SYSTEM OF COLD ATOMS

摘要

We consider light trapping in an amplifying medium consisting of cold alkali-metal atoms; the atomic gas plays a dual role as a scattering and as a gain medium. We perform Monte-Carlo simulations for the combined processes. In some configurations of the inhomogeneous distribution this leads to a point of instability be- havior and a signature of random lasing in a cold atomic gas.