Bi-functional nonlinearities in monodisperse ZnO nano-grains -   Self-consistent transport and random lasing
  We report a quantum field theoretical description of light transport and random lasing. The Bethe-Salpeter equation is solved including maximally crossed diagrams and non-elastic scattering. This is the first theoretical framework that combines so called off-shell scattering and lasing in random media. We present results for the self-consistent scattering mean free path that varies over the width of the sample. Further we discuss the density dependent correlation length of self-consistent transport in disordered media composed of semi-conductor Mie scatterers. 
Andreas Lubatsch and Regine Frank
physics.optics cond-mat.dis-nn cond-mat.mes-hall quant-ph