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1111-D03-09

Excitation Pathways of Rare Earth Ions by Energetic Electrons S. Tafon Penn, Z. Fleischman, L. Maurer and V. Dierolf; Physics, Physics, Lehigh University, Bethlehem, Pennsylvania ABSTRACT Using cathodoluminescence measurements, we studied the excitation of rare earth ions in LiNbO3 and compare it with previously studied Eu ions in GaN. We find that in both hosts and all dopants the most efficient excitation pathways involves a defect traps that capture the energy from the electron-hole pairs created in the host by E-beam irradiation. Even then the excitation efficiency in LiNbO3 is very low. Moreover, only a small fraction (

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