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Luminescent Enhancement in Mg- and Er-Codoped LiNbO3 Crystals

唐莉勤、赵丽娟、Xinzheng Zhang、余华、孟婕、梁沁、许京军、孔勇发

2005Acta Scientiarum Naturalium Universitatis SunyatseniPhysics and Astronomy被引 1

摘要

We investigate the MgO codoping-induced effect on the luminescent properties of Er^3+-doped and Er/Mg codoped LiNbO3 crystals. The emission and excitation spectra and the absorption spectra are measured. The results show that the luminescent behaviour of Er^3+ ions is very sensitive to the codoping of Mg^2+ ions. According to the photorefractive level theory, we propose a quench model for the Er/Mg codoped lithium niobate crystal. The quench centres are suggested to be the bipolaron (NbLi-NbNb), we attribute the luminescent enhancement to the decreasing concentration of these centres. The luminescent enhancement effect is successfully explained.

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