Clustering study in Eu(DBM)_3Phen-doped polymer optical fibers by optical properties and near-field scanning microscopy

摘要

The clusters of Eu~(3+) ion in Eu(DBM)_3Phen-doped polymethyl methacrylate (PMMA) have been studied by three means. The relative fluorescence intensity ratio of the ~5D_0 → ~7F_2 to ~5D_0 → ~7F_1 transitions with different concentrations of Eu~(3+) in Eu(DBM)_3Phen-doped PMMA and metastable-state (~5D_0) lifetime dependence on Eu~(3+) concentration are analyzed. The analysis indicates that there are no clustering effects in Eu~(3+) ions of Eu(DBM)sPhen-doped PMMA when the Eu~(3+) doping concentration is up to 1.0 wt.-%. At the Same time, the clustering effect has not been observed by the scanning near-field optical microscopy (SNOM) in Eu(DBM)_3Phen-doped PMMA with 1.0 wt.-% of Eu~(3+) ions. The analysis reveals that a high concentration of Eu~(3+) can be incorporated into polymer optical fiber (POF) without clustering effect.