Color centers in LiCaAlF 6 single crystals and their suppression by doping

Hiroki Sato, Hiroshi MacHida, Kiyoshi Shimamura, Amina Bensalah, Tomohiko Satonaga, Tsuguo Fukuda, Eva Mihokova, Michal Dusek, Martin Nikl, Anna Vedda

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


LiCaAlF 6 (LiCAF) single crystals pure and doped with MgF 2 and BaF 2 were successfully grown by the Czochralski technique. Optical absorption measurements in the UV/Visible spectral regions following x-ray irradiation (radiation induced absorption) were performed in order to investigate the radiation damage of the crystals. The F-center absorption band at 262 nm is the dominating induced absorption feature. The amplitude of the F-absorption band is suppressed by more than a factor of 3 in Mg-doped LiCAF compared to undoped, while for Ba-doped LiCAF, almost no variation is obtained. In Mg-doped crystals the optimum doping concentration is of about 0.2 mol% of MgF 2 in the melt.

Original languageEnglish
Pages (from-to)5666-5670
Number of pages5
JournalJournal of Applied Physics
Issue number9
Publication statusPublished - 2002 May 1


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