Energy transfer amongYb3+ions in a silicate glass

Abstract

We have used time-resolved fluorescence line narrowing to study energy transfer among ${\mathrm{Yb}}^{3+}$ ions in a silicate glass as a function of energy mismatch between donors and acceptors and temperature from 4.2 to 51 K. The observed spectra are consistent with a one-phonon-assisted multipolar interaction between ${\mathrm{Yb}}^{3+}$ ions with a variation with site separation of $r^{\mathrm{-}13}$. These results are compared to that reported for other rare-earth-ion transitions in glasses and crystals.