Abstract
The photoluminescent characteristics of Eu 3+ ions in 10ZnO–90SiO 2 glasses before and after femtosecond (fs) laser irradiation were systematically compared and investigated. The results indicated that the absorption of charge transfer (CT) decreased and 7 F 0 – 7 F 6 transition of Eu 3+ ions increased in irradiated glasses. According to emission spectra, relative intensity of 5 D 0 – 7 F 0 transition and the intensity ratio of 5 D 0 – 7 F 2 / 5 D 0 – 7 F 1 transitions of Eu 3+ in irradiated glasses evidently increased due to the changes of local structures around Eu 3+ . The dynamic processes indicated that the transition probability of electric dipole transitions of Eu 3+ ions hardly changed before and after irradiation. The 7 F 0 – 5 D 0 excitation lines blue shifted after irradiation, implying that the structure changes induced by fs laser irradiation took place. The efficiency of persistent spectral hole-burning (PSHB) of Eu 3+ ions in irradiated glasses remarkably increased in comparison with not irradiated glass. The fluorescence line narrow (FLN) spectra indicated that the microstructures changes surrounding Eu 3+ ions induced by fs laser were observed.
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