A SIMPLE KEY FOR ER:YB:YAB CRYSTAL UNVEILED

The nonradiative transition costs Keep to the formulation WNR = W (0) exp(-alphap), the place p is the amount of phonons matching the energy gap. The nonradiative changeover charges of Er3+ exhibit temperature dependence in line with the multiphonon leisure idea. In Tm3+ the temperature dependence of nonradiative peace costs is difficult by the exi