Two-photon pumped zinc oxide random laser

摘要

Zinc oxide is a promising material for creation of novel ultraviolet light sources. In this work we study random laser action in a thin ZnO nanocluster film under two-photon pumping. The results are compared with the case of single-photon pumping. A theoretical model is developed, which shows the effect of boundary conditions on lasing in the film. Measurement results of nonlinear transmission are presented and compared with classical two-photon absorption model.