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The spectroscopic characterization and fluorescence dynamics of Yb~(3+):LiLa(WO_4)_2 crystal are investigated. The Yb~(3+):LiLa(WO_4)_2 crystal exhibits a broad absorption and emission spectral bands,large absorption and emission cross sections,and moderate fluorescence lifetime.Blue light emission around 480 nm is observed at 10 K and is demonstrated through cooperative upconversion from the deexcitation of excited Yb~(3+)-Yb~(3+) pairs.
The spectroscopic characterization and fluorescence dynamics of Yb ~ (3 +): LiLa (WO_4) _2 crystal are investigated. The Yb ~ (3 +): LiLa (WO_4) _2 crystal exhibits a broad absorption and emission spectral bands, cross sections, and a moderate fluorescence lifetime. Blue light emission around 480 nm is observed at 10 K and demonstrated through cooperative upconversion from the deexcitation of excited Yb ~ (3 +) - Yb ~ (3+) pairs.