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Investigation of Structural and Optical Homogeneity of LiNbO 3 :ZnO Crystals of Different Genesis
Inorganic Materials: Applied Research ( IF 0.5 ) Pub Date : 2020-04-13 , DOI: 10.1134/s207511332002029x M. N. Palatnikov , N. V. Sidorov , A.V. Kadetova , L. A. Aleshina , N. A. Teplyakova , S. M. Masloboeva , O. V. Makarova
中文翻译:
不同成因的LiNbO 3:ZnO晶体的结构和光学同质性研究
更新日期:2020-04-13
Inorganic Materials: Applied Research ( IF 0.5 ) Pub Date : 2020-04-13 , DOI: 10.1134/s207511332002029x M. N. Palatnikov , N. V. Sidorov , A.V. Kadetova , L. A. Aleshina , N. A. Teplyakova , S. M. Masloboeva , O. V. Makarova
Abstract
Nominally pure congruent LiNbO3 crystal and LiNbO3:ZnO ([ZnO] ~ 5.4–6.4 mol % in the melt) crystals of different genesis are studied using photoinduced light scattering, laser conoscopy, and X-ray diffraction (method of moments). The photorefractive properties and optical and structural uniformity are analyzed. It is found that LiNbO3:ZnO crystals obtained by direct solid phase doping have the best optical and structural uniformity, the lowest photorefractive sensitivity, and a high compositional uniformity along the polar axis. Crystals obtained by homogeneous doping are compositionally uniform, although their optical and structural uniformity is worse than those of LiNbO3:ZnO crystals obtained by direct solid phase doping. Anomalies of conoscopic patterns are caused by the presence of charged structural defects in LiNbO3:ZnO crystals and the distortion of the optical indicatrix induced by mechanical stresses and compositional inhomogeneity of the crystals. High temperature annealing in short-circuited state of LiNbO3:ZnO crystals with high dopant concentration leads to healing of charged defects and improvement of optical characteristics in general. The distribution coefficient for LiNbO3:ZnO crystals obtained by the homogeneous doping method is significantly higher than that for the crystals obtained by the direct solid phase doping method.中文翻译:
不同成因的LiNbO 3:ZnO晶体的结构和光学同质性研究