Excitonic processes in pure and doped CaF2

Authors
Denks, V Maaroos, A Nagirnyi, V Savikhina, T Vassiltsenko, V
Citation
V. Denks et al., Excitonic processes in pure and doped CaF2, J PHYS-COND, 11(15), 1999, pp. 3115-3125
Citations number
29
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984 → ACNP
Volume
11
Issue
15
Year of publication
1999
Pages
3115 - 3125
Database
ISI
SICI code
0953-8984(19990419)11:15<3115:EPIPAD>2.0.ZU;2-W
Abstract
The optical properties of nominally pure CaF2 crystals as well as of those of pure and Li+-, Na+-, Mg2+- and Mn2+-doped CaF2 powders are compared. The emission band peaking at 3.9 eV and the excitation bands in the region 10- 10.6 eV observed for CaF2:Li and CaF2:Na powders are ascribed to the radiat ive decay of a self-trapped exciton perturbed by an anion vacancy or impuri ty-vacancy dipole. A Mn2+-perturbed exciton has been found in CaF2:Mn.