Spectra (UV-Visible, IR transmission) of Sc3+, Fe3+ and Cu2+ tri-doped LiNbO3 crystals with various [Li]/[Nb] ratios

被引：6
作者：
Dai, Li [1 ]
Han, Xianbo [1 ]
Shao, Yu [1 ]
Wang, Luping [1 ]
Liu, Chunrui [1 ]
Xu, Yuheng [2 ]
机构：
[1] Harbin Univ Sci & Technol, Coll Sci, Harbin 150080, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Dept Appl Chem, Harbin 150001, Heilongjiang, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2018年 / 32卷 / 27期
关键词：
Sc:Fe:Cu:LiNbO3 crystal; UV-Visible spectrum; IR transmission spectrum; OPTICAL-DAMAGE RESISTANCE; PHOTOREFRACTIVE PROPERTIES; LI/NB RATIO; GROWTH; PARAMETERS; CENTERS;
D O I：
10.1142/S0217984918503281
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The Sc:Fe:Cu:LiNbO3 crystals were grown with Fe3+(0.3 wt.%), Cu2+(0.1 wt.%) and Sc3+(1 mol.%) by the Czochralski method with various [Li]/[Nb] ratios (0.946, 1.05, 1.20 and 1.38). The influence of the [Li]/[Nb] ratios on the defect structure of Sc:Fe:Cu:LiNbO3 crystals was analyzed by the UV-Visible spectra and IR transmission spectra. The spectra show that the absorption edge shift to the red with [Li]/[Nb] ratios enhancing. The Sc:Fe:Cu:LiNbO3 crystals with [Li]/[Nb] ratio of 1.05 is nearly stoichiometric. A new narrow OH- associated vibrational peak at 3505 cm(-1) was revealed in Sc:Fe:Cu:LiNbO3 crystals with the ratio of [Li]/[Nb] = 1.38. It is attributed to the (Sc-Nb(2-))-(OH)(-). The results show that the defect structure changes with the [Li]/[Nb] ratios variation.
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页数：7
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