Abstract

We show that Ce3+ can be an efficient sensitizer for Yb3+ in the host lattice of yttrium aluminum garnet (YAG). With blue-light excitation to induce the 4f5d transition of Ce3+, characteristic near-IR emission of Yb3+ due to transition of F522F722 peaking at 1030nm is generated as a result of energy transfer from Ce3+ to Yb3+. The result of spectral evolution with temperature indicates that the efficiency of energy transfer is enhanced owing to thermal effect. This evidence implies that the phonon-assisted process participates in the downconversion of YAG: Ce3+, Yb3+.

© 2009 Optical Society of America

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