TEMPERATURE-DEPENDENT LUMINESCENCE QUENCHING IN RANDOM NANO POROUS MEDIA

摘要

The luminescence quenching of a random, crystalline one-dimensional model porous medium doped with rare-earth elements, is analyzed by considering the transport, transition, and interaction of the fundamental energy carriers. The quenching in nano porous media is enhanced compared to a single crystal, due to multiple scattering, enhanced absorption, and low thermal conductivity. The coherent wave treatment is used to calculate the photon absorption, in order to allow for field interference and enhancement. The luminescent and thermal emission is considered as incoherent. The luminescence quenching and nonlinear thermal emission, occurring with increasing irradiation intensity, are predicted.