Dielectric behavior of composite solid state laser matrices containing perylene chromophores

The dielectric relaxation spectra of dye containing silica gel-PMMA and bul k PMMA composites, recorded by means of the TSDC dielectric technique in th e temperature range 10-320 K, have demonstrated a variety of overlapping th ermally-induced current bands associated with different modes of dielectric relaxation, which are rather characteristic of the polymeric component. Mo lecular interactions between the inorganic (SiO2) and polymeric (PMMA) phas es have been shown to reflect in the activation energies of the polymer's p -relaxation mode. In the present study, the effect is unambiguously illustr ated in the energy spectrum analysis of the partial discharge curves and th e mathematical analysis based upon the varying heating rates procedure intr oduced by Solunov and Ponevsky.