J. Phys. IV France 04 (1994) C4-385-C4-388
Cr3+, Nd3+ multisites, pairs and energy transfer processes in laser crystal YAlO3J.A. MARES1, G. BOULON2, A. BRENIER2, L. LOU2, 3, S.R. ROTMAN4 and H. LURIA4
1 Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Praha 6, Czech Republic
2 LPCML, URA 442 du CNRS, Université Lyon I, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne cedex, France
3 University of Science and Technology of China, 230026 Hefei, Anhui, The People's Republic of China
4 Ben Gurion University of the Negev, Department of Electrical and Computer Engineering, 84105 Beer-Sheva, Israel
Detailed spectroscopic studies of YAlO3:Nd, YAlO3:Cr and YAlO3:Nd, Cr have shown that these crystals contain up to eight Nd3+ multisites and three Cr3+ ones. [MATH] energy transfer is observed between various multisites and is starting from 2E Cr3+ energy level. Cr3+ donor decay can be adequately fit with the standard Inokuti-Hirayama theory but an assumption of a spatial correlation between Cr3+ donors and Nd3+ acceptors does a much better fit of Nd3+ fluorescence decay.
© EDP Sciences 1994