Abstract
A new 1.75 μm infrared emission transition of Y 2O 3:Er 3+ is assigned to the 4S 3/2 → 4I 9/2 transition of Er 3+ ions situated at the C 2 sites of cubic RE 2O 3 (RE = Y, Gd, Lu). The intensities of features in the 1.54 μm 4I 15/2- 4I 13/2 absorption transition due to Er 3+ at S 6 and C 2 sites are consistent with the site occupation ratio and the relative magnetic dipole-electric dipole intensity contributions of Er 3+ at the different sites. The 1.54 μm emission lines are predominantly from Er 3+ ions at C 2 sites. The different behaviours of the emission intensities 1.75 and 1.54 μm groups with change in Er 3+ dopant ion concentration, preparation technique, Yb 3+ co-doping, temperature change and different excitation line are rationalized.
Original language | English |
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Pages (from-to) | 331-335 |
Number of pages | 5 |
Journal | Chemical Physics Letters |
Volume | 400 |
Issue number | 4-6 |
DOIs | |
Publication status | Published - 21 Dec 2004 |