Open AccessGrowth and structure characterization of Cr4+ doped Ca2GeO4 laser crystal
Author(s) -
Shanli Zhang,
Fanming Zeng,
Wang Xin-Tong,
Chun Liu,
Chengwei Wang,
Ying Zhang,
Hai Lin,
Qin Jie-Ming,
Jinghe Liu
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.7214
Subject(s) - x ray photoelectron spectroscopy , monoclinic crystal system , materials science , raman spectroscopy , crystal structure , crystal (programming language) , valence (chemistry) , single crystal , crystallography , spectroscopy , doping , optics , chemistry , nuclear magnetic resonance , optoelectronics , physics , programming language , organic chemistry , quantum mechanics , computer science
A new kind of Cr4+ :Ca2GeO4 infrared tunable laser crystals were synthesized by flux growth method with CaCl2 as solvent. The structure of Cr4+ :Ca2GeO4 was characterized by x ray diffraction, Raman spectroscopy (RS) and x ray photoelectron spectroscopy(XPS). The results showed that the obtained crystal was γ-Cr4+ :Ca2GeO4 single crystal with monoclinic structure belonging to olivine structure, and the lattice parameters are: a=5.3209 (1 =0.1 nm), b=6.6648 , c=11.2606 . The result that (GeO4)4- exists in the crystal was verified by RS measurement and its vibration was determined. We can see from the XPS measurement that Cr in the crystal is in the form of Cr4+ and no other valence states exist.