title: Influence of crystal structure on the fluorescence emission of Eu3+:LaOF nanocrystals.
abstract: Optical transitions of Eu(3+)-doped LaOF nanocrystals with tetragonal and rhombohedral structures were studied experimentally using laser spectroscopic method. Fluorescence emissions from 5D1 and 5D0 of Eu3+ in LaOF nanocrystals were detected by exciting the sample with a 532 nm pulsed laser, and the influence of local symmetry on the fluorescence emission of doped ions was observed. The specific crystalline phase as well as the local symmetry on the fluorescence emission was investigated in both the frequency domain and time domain. It was found that Eu3+ ions doped in the tetragonal crystal structure present more efficient fluorescence emission, which was explained by lower symmetric distribution of local field at the doped ions.
authors.affiliation: College of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, PR China.
authors.forename: Enjie
authors.initials: E
authors.lastname: He
authors.forename: Hairong
authors.initials: H
authors.lastname: Zheng
authors.forename: Zhenglong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xisheng
authors.initials: X
authors.lastname: Zhang
authors.forename: Liangmin
authors.initials: L
authors.lastname: Xu
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Fu
authors.forename: Yu
authors.initials: Y
authors.lastname: Lei