| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7908711 | Optical Materials | 2016 | 5 Pages |
Abstract
Nonequilibrium carrier dynamics in the scintillators prospective for fast timing in high energy physics and medical imaging applications was studied. The time-resolved free carrier absorption investigation was carried out to study the dynamics of nonequilibrium carriers in wide-band-gap scintillation materials: self-activated led tungstate (PbWO4, PWO) ant two garnet crystals, GAGG:Ce and YAGG:Ce. It was shown that free electrons appear in the conduction band of PWO and YAGG:Ce crystals within a sub-picosecond time scale, while the free holes in GAGG:Ce appear due to delocalization from Gd3+ ground states to the valence band within a few picoseconds after short-pulse excitation. The influence of Gd ions on the nonequilibrium carrier dynamics is discussed on the base of comparison the results of the free carrier absorption in GAGG:Ce containing gadolinium and in YAGG without Gd in the host lattice.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
E. Auffray, M. Korjik, M.T. Lucchini, S. Nargelas, O. Sidletskiy, G. Tamulaitis, Y. Tratsiak, A. VaitkeviÄius,