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1 August 2007 Optical studies of the partially disordered crystals langasite (La3Ga5SiO14) and langatate (La3Ga5.5Ta0.5O14) doped with Eu3+
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Proceedings Volume 6785, ROMOPTO 2006: Eighth Conference on Optics; 678509 (2007) https://doi.org/10.1117/12.755506
Event: ROMOPTO 2006: Eighth Conference on Optics, 2006, Sibiu, Romania
Abstract
We analyze, using the fluorescence spectroscopy of Eu3+, two partially disordered crystals from the langasite family: langasite and langatate. There are two main differences between these crystals: (a) the randomly occupied positions (Ga3+ - Si4+ in tetrahedral positions for langasite and Ga 3+ - Ta 5+ in octahedral positions for langatate) and (b) the charge difference between the ions in these positions (1e for langasite and 2e for langatate). For LGS:Eu, the presence of multiple fluorescent centers could not be evidenced, while for LGT:Eu the splitting of the fluorescence lines clearly indicates the presence of multiple fluorescent centers.
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S. Georgescu, O. Toma, A. Achim, A. M. Chinie, L. Gheorghe, and A. Stefan "Optical studies of the partially disordered crystals langasite (La3Ga5SiO14) and langatate (La3Ga5.5Ta0.5O14) doped with Eu3+", Proc. SPIE 6785, ROMOPTO 2006: Eighth Conference on Optics, 678509 (1 August 2007); https://doi.org/10.1117/12.755506
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