Abstract

High-resolution spectroscopic investigation and the cooperative absorption and emission at high concentrations of Yb doped Sc<sub>2</sub>O<sub>3</sub> transparent ceramics indicates that Yb<sup>3+</sup> ions occupy at random the sites of C<sub>2</sub> and C<sub>3i</sub> symmetry without obvious clustering.

© 2006 Optical Society of America

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