Rare earths in nanocrystalline glass-ceramics
Keywords: انتقال انرژی; 42.70.âa; 81.07.Bc; 78.47.+p; 42.70.Hj; 78.45.+h; Spectral intensities; Upconversion; Stimulated emission; Energy transfer; Nanocrystals; Rare earths;