Optical absorption edge of Mg+Zn:LiNbO3

被引：11
|
作者：
Yang, XL
Xu, GF
Li, HP
Zhu, JG
Wang, X
机构：
[1] SW INST TECH PHYS,CHENGDU 610015,PEOPLES R CHINA
[2] ACAD SINICA,INT CTR MAT PHYS,SHENYANG 110015,PEOPLES R CHINA
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 1996年 / 31卷 / 04期
关键词：
D O I：
10.1002/crat.2170310418
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The optical transmittance of LiNbO3 single crystal double doped with MgO and ZnO was measured from the ultraviolet to the visible range. The wavelength dependence of the absorption coefficient a and its root alpha(1/2) (alpha versus hv and alpha(1/2) versus hv, respectively) were calculated and the characteristics of the absorption edge were discussed. The energy gaps E(g) and E(g)' of the crystals which correspond to the direct transition and the indirect transition, respectively; and the energy of phonons taking part in the indirect transition were calculated. The effects of dopants Mg and Zn on the optical absorption properties are discussed. It was found that the energy E(g)' of our sample which was double doped with MgO and ZnO was smaller than that of congruent LN, causing the indirect transition absorption edge to move towards the infrared.
引用
收藏
页码：521 / 527
页数：7
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