摘要
用５１４．５ｎｍ、４８８．０ｎｍ的Ａｒ＋激光和４４１．６ｎｍ的Ｈｅ－Ｃｄ激光激发Ｅｕ３＋Ｙ２ＳｉＯ５晶体，获得了一系列窄带荧光谱线，其中双重谱线结构源于Ｅｕ３＋离子发光中心在该材料中占据两种不等价的非对称光学格位。测得了Ｅｕ３＋Ｙ２ＳｉＯ５的Ｘ射线多晶衍射谱的面间距数据，计算了晶格常数和晶面角度，通过和非掺杂Ｙ２ＳｉＯ５晶体数据的比较。
Narrow line fluorescence spectra of Eu 3+ ∶Y 2SiO 5 crystal are obtained by exciting with Ar + laser at 514.5 nm, 488 nm and He Cd laser at 441.6 nm. Complex spectral structure is analyzed and identified, which is understood as originating from taking off the energy level degeneracy of Eu 3+ in the host crystal field and the possession of two inequivalent lattice sites of Eu 3+ in the host crystal. X ray powder diffraction pattern of Eu 3+ ∶Y 2SiO 5 shows that the the crystal is monoclinic. The lattice constants a, b, c and β are obtained by a simulation with the measured difraction angles, and found that the lattice constants a, b, c are slightly larger but very close to those of undoped Y 2SiO 5 crystal.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1999年第1期127-131,共5页
Acta Optica Sinica
基金
国家自然科学基金
关键词
荧光谱
多晶衍射谱
稀土离子掺杂
晶体
Eu 3+ ∶Y 2SiO 5, fluorescence spectra, powder diffraction.
