Up-conversion luminescence polarization control in Er3+-doped NaYF4 nanocrystals
Zhang Hui1, Yao Yun-Hua2, Zhang Shi-An2, †, , Lu Chen-Hui3, Sun Zhen-Rong2
       

XRD curve of glass ceramic containing Er3+-doped NaYF4 nanocrystals. Here, those peaks from α-NaYF4 are indexed.