Time-resolved luminescence data on the 1060 nm transition in Nd3+-doped zinc tellurite glasses

We report time-resolved luminescence data for the F-4(3/2) --> I-4(11/2) transition in Nd3+-doped zinc tellurite glass. The photoluminescence (PL) shows nonexponential decay and the associated decay time depends on ion concentration. PL results are analysed and discussed using the stretched exponential function, commonly used to describe disordered systems. The nonexponential behaviour has been explained as due to a multi-configurational distribution of luminescent ions in a disordered medium. The dipole-dipole interactions remain at the origin of the PL decay time shortening.