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Upconversion Emission of Infrared Excited Er3+-Doped Transparent Glass Ceramics Containing CaF2 Nano-Crystals
- Source :
- Key Engineering Materials; April 2007, Vol. 336 Issue: 1 p1846-1848, 3p
- Publication Year :
- 2007
-
Abstract
- Upconversion luminescence of Er3+-doped SiO2-Al2O3-CaO-NaF-CaF2 transparent glass ceramics under 980 nm excitation was investigated. XRD and TEM experiments revealed the homogeneous distribution of CaF2 nano-crystals among the glassy matrix. Intense red upconversion signal was recorded and its intensity increased with the increasing of heating temperature and Er3+-doping level at the range of 0.1 to 1.0 mol%. When Er3+ doping reached 2 mol%, the concentration quenching effect appeared. All these results could be due to the incorporation of Er3+ ions into precipitated CaF2 nano-crystals. The quadratic pump power dependence of the upconversion luminescence intensity indicated that the transition mechanism of the red emission was due to two-photon absorption processes.
Details
- Language :
- English
- ISSN :
- 10139826 and 16629795
- Volume :
- 336
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Key Engineering Materials
- Publication Type :
- Periodical
- Accession number :
- ejs20053332
- Full Text :
- https://doi.org/10.4028/www.scientific.net/KEM.336-338.1846