Induced changes in the refractive index of LiNbO₃ crystals through Sc₂O₃ doping

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• 作者：Nevado ; R. ; Camarillo ; E. ; Bravo ; D. ; Aguirre de Cá ; rcer ; I. ; Lifante ; G. ; Jaque ; F.
• 关键词：Lithium niobate ; Refractive index ; Metal impurities ; 78.20.Ci ; 66.10.Cb ; 42.82.+n
• 刊名：Materials Letters
• 出版年：2002
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：January, 2002
• 卷：52
• 期：1-2
• 页码：1-4
• 文件大小：60.3 K

摘要

The dependence of the ordinary (n_o) and extraordinary (n_e) refractive indices in congruent Sc₂O₃-doped LiNbO₃ crystals are reported. The Sc³⁺ ion concentrations in the crystals were varied from 0%to 7%. It has been found that n_o shows a clear singularity for a Sc³⁺ ion concentration of 3%. The experimental data of n_o and n_e are described by a generalised Sellmeier equation, which takes into account different Sc³⁺ ions sites location in the host matrix. Additionally, the role of the Sc₂O₃ content in the intrinsic defect distribution in LiNbO₃ crystals has been studied by using Cr³⁺ ions as an EPR probe.