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Proceedings Paper

Optical studies of the partially disordered crystals langasite (La3Ga5SiO14) and langatate (La3Ga5.5Ta0.5O14) doped with Eu3+
Author(s): S. Georgescu; O. Toma; A. Achim; A. M. Chinie; L. Gheorghe; A. Stefan
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Paper 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.

Paper Details

Date Published: 1 August 2007
PDF: 6 pages
Proc. SPIE 6785, ROMOPTO 2006: Eighth Conference on Optics, 678509 (1 August 2007); doi: 10.1117/12.755506
Show Author Affiliations
S. Georgescu, National Institute for Laser, Plasma, and Radiation Physics (Romania)
O. Toma, National Institute for Laser, Plasma, and Radiation Physics (Romania)
A. Achim, National Institute for Laser, Plasma, and Radiation Physics (Romania)
A. M. Chinie, National Institute for Laser, Plasma, and Radiation Physics (Romania)
L. Gheorghe, National Institute for Laser, Plasma, and Radiation Physics (Romania)
A. Stefan, National Institute for Laser, Plasma, and Radiation Physics (Romania)


Published in SPIE Proceedings Vol. 6785:
ROMOPTO 2006: Eighth Conference on Optics

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