The formation characteristics of closed-loop random cavities inside highly disordered ZnO films with and without rib waveguide structure are investigated. The size dependence of the random cavities inside the random media on temperature and pump intensity profile is studied by applying Fourier transform to the corresponding lasing spectra. Simple rate equation analysis has revealed that the formation of the random cavities depends mainly on the profile of the optical gain, which is a function of the pump intensity profile and carrier diffusion length of the random media.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)