| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1623365 | Journal of Alloys and Compounds | 2008 | 5 Pages |
The photoluminescent characteristics of Eu3+ ions in 10ZnO–90SiO2 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 7F0–7F6 transition of Eu3+ ions increased in irradiated glasses. According to emission spectra, relative intensity of 5D0–7F0 transition and the intensity ratio of 5D0–7F2/5D0–7F1 transitions of Eu3+ in irradiated glasses evidently increased due to the changes of local structures around Eu3+. The dynamic processes indicated that the transition probability of electric dipole transitions of Eu3+ ions hardly changed before and after irradiation. The 7F0–5D0 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 Eu3+ ions in irradiated glasses remarkably increased in comparison with not irradiated glass. The fluorescence line narrow (FLN) spectra indicated that the microstructures changes surrounding Eu3+ ions induced by fs laser were observed.
