  The interplay between nonlinear effects and Anderson localization in
disordered optical fibres1 has recently attracted great interest, and it is
important in the action of random lasers in which closed multiple scattering
loops have enhanced intensity. As optical nonlinearities in TiO2 can give
valuable information on the nature of light transport in strongly scattering
powders, we studied these effects in an extended experimental and theoretical
investigation (to be published). Now, Scheffold and Wiersma have ...

Disordered Systems and Neural Networks;Mesoscale and Nanoscale Physics;Materials Science;Soft Condensed Matter;Optics