Tuning the Quantum Efficiency of Random Lasers - Intrinsic Stokes-Shift and Gain
Abstract
We report the theoretical analysis for tuning the quantum efficiency of solid state random lasers. Vollhardt-Woelfle theory of photonic transport in disordered non-conserving and open random media, is coupled to lasing dynamics and solved positionally dependent. The interplay of non-linearity and homogeneous non-radiative frequency conversion by means of a Stokes-shift leads to a reduction of the quantum efficiency of the random laser. At the threshold a strong decrease of the spot-size in the stationary state is found due to the increase of non-radiative losses. The coherently emitted photon number per unit of modal surface is also strongly reduced. This result allows for the conclusion that Stokes-shifts are not sufficient to explain confined and extended mode regimes.
Keywords
Cite
@article{arxiv.1505.06781,
title = {Tuning the Quantum Efficiency of Random Lasers - Intrinsic Stokes-Shift and Gain},
author = {Andreas Lubatsch and Regine Frank},
journal= {arXiv preprint arXiv:1505.06781},
year = {2020}
}
Comments
4 figures, Scientific Reports (2015)