Abstract
The impact of excitation intensity on the Stokes and anti-Stokes luminescent properties of Nd 3+ ions in stoichiometric LiNdP 4O 12 nanocrystalline powders was investigated. The Stokes fluorescence of the spectra relative intensities were strongly affected by excitation power at double 808 and 830 nm. The fluorescence decay became nonexponential and shortened with the pumping power increase. The efficient up-conversion under strong 808 nm excitation was observed in the visible range and four anti-Stokes bands were assigned. The up-conversion intensity was raising with a remarkably long time constant equal to around 1 s, which decreased with the pumping power increase.
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