Abstract
Experimental spectroscopic investigations of the absorption and luminescence properties of Er 3+ ions doped into single crystals of the tetragonal-symmetry host LuPO 4 are reported. The LuPO 4 host permits the incorporation of relatively high concentrations of lanthanide dopants such as Er 3+. The fluorescence decay of the 4 I 13/2– 4 I 15/2 emission was found to be governed by a single exponential decay process when excited with a low-intensity pump source. However, experiments performed on samples of different concentrations show that Er 3+ ions in LuPO 4 experience concentration quenching as well as self-trapping. Using high-Er-concentration samples, emissions were also observed at visible wavelengths due to up-conversion processes.
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