Abstract
We show that can be an efficient sensitizer for in the host lattice of yttrium aluminum garnet (YAG). With blue-light excitation to induce the transition of , characteristic near-IR emission of due to transition of peaking at is generated as a result of energy transfer from to . 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: , .
© 2009 Optical Society of America
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