Energy transfer amongNd3+ions in garnet crystals

Abstract

Laser-excited, time-resolved site-selection spectroscopy techniques were used to investigate energy transfer between ${\mathrm{Nd}}^{3+}$ ions in ${\mathrm{Y}}_3$ ${\mathrm{Al}}_5$ ${\mathrm{O}}_{12}$ and ${\mathrm{Y}}_3$ ${\mathrm{Ga}}_5$ ${\mathrm{O}}_{12}$ crystals. The results are consistent with a multistep diffusion type of energy transfer with the mechanisms for diffusion and trapping both involving resonant two-phonon-assisted processes.