Radiative and Nonradiative Energy Transfer Between Cr3+ and Nd3+ in GSGG

Abstract

We have studied the effect of temperature on the radiative and nonradiative energy transfer processes between Cr3+ and Nd3+ in GSGG. The radiative energy transfer rate was found to decrease slowly with increasing temperature. The nonradiative energy transfer rate was calculated as a function of temperature from the Cr lifetime data and found to increase with increasing temperature. The integrated intensity of the Nd emission in the GSGG: Cr, Nd sample, when the system is pumped in the Nd absorption bands, is constant with temperature (and so is the Nd lifetime); however, when the system is pumped in the Cr absorption bands, it has a different temperature dependence. A model, that takes into account the variations of the energy transfer process with temperature is presented to explain these phenomena and the temperature dependence of the Nd emission in the GSGG: Cr, Nd sample.KeywordsEnergy Transfer ProcessNonradiative Energy TransferDecay PatternEnergy Transfer RateFlash TubeThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.