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The electronic structures of LiLuF 4 crystals containing F and F 2 color center with the lattice structure optimized are studied based on the density functional theory (DFT). The lattice is optimized by using ABINIT package. The calculations by using DV-X alpha(α) indicate that both the F and F 2 centers create donor electronic density peak within the forbidden band of the...
The Yb:Er co-doped Al 2 O 3 thin film was deposited on oxidized silicon wafers by microwave ECR plasma source enhanced RF magnetron sputtering, and annealed from 800°C to 1000°C. The photoluminescence at 1.53μm of thin film was obtained under room temperature. The mixture phase structure of γ and θ is observed by XRD, and the compositions of the thin film are investigated by EPMA....
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