Threshold of a Random Laser with Cold Atoms
Abstract
We address the problem of achieving an optical random laser with a cloud of cold atoms, in which gain and scattering are provided by the same atoms. The lasing threshold can be defined using the on-resonance optical thickness b0 as a single critical parameter. We predict the threshold quantitatively, as well as power and frequency of the emitted light, using two different light transport models and the atomic polarizability of a strongly-pumped two-level atom. We find a critical b0 on the order of 300, which is within reach of state-of-the-art cold-atom experiments. Interestingly, we find that random lasing can already occur in a regime of relatively low scattering.
Cite
@article{arxiv.0812.0266,
title = {Threshold of a Random Laser with Cold Atoms},
author = {Luis S. Froufe-Pérez and William Guerin and Rémi Carminati and Robin Kaiser},
journal= {arXiv preprint arXiv:0812.0266},
year = {2015}
}
Comments
Note that Eq. (3) of the published version in PRL contains a misprint. The correct expression is given here