Radiation Modification of Optical Characteristics of LiNbO3:Zn and LiNbO3:Mg Crystals

Crystals

Sergey Panasjuk¹  Mikhail Palatnikov²  Olga Makarova²  Nikolay Sidorov²  Natalya Teplyakova² 

[1] St. Petersburg State Institute of Technology, Chemistry and Biochemistry Department, 190013 St. Petersburg, Russia;Tananaev Institute of Chemistry-Subdivision of the Federal Research Centre, Kola Science Centre of the Russian Academy of Sciences, 184206 Apatity, Russia;

关键词: lithium niobate;    ionizing radiation;    optical homogeneity;    charged defects;    photoinduced light scattering;    conoscopic patterns;   

DOI  :  10.3390/cryst12050600

来源: DOAJ

【 摘 要 】

The modification of the optical characteristics of LiNbO₃:Zn and LiNbO₃:Mg crystals grown by the Czochralski method was investigated using β and γ radiation. The photorefractive effect was found to be inhibited by ionizing radiation in the LiNbO₃:Zn ([ZnO] ≈ 2.1 mol%) crystal, which belonged to a below-threshold concentration range. The inhibition was attributed to a stepwise radiation annealing of charged defects. Ionizing radiation increased the general optical uniformity of above-threshold crystals LiNbO₃:Zn ([ZnO] ≈ 5.9 mol%) and LiNbO₃:Mg([MgO] ≈ 5.6 mol%). In addition, we determined that radiation annealing substantially influenced photorefraction dynamics in lightly doped LiNbO₃:Zn ([ZnO] ≈ 0.1 mol%) crystals, which widens their application areas.

【 授权许可】

Unknown