Improvement of the photorefractive responsive time and optical damage resistance of LiNbO3 by co-doping with uranium and magnesium

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2024-10-11 DOI:10.1016/j.optmat.2024.116223

Tian Tian , Tingfeng Wu , Jie Zhang , Shuolin Wang , Hongde Liu , Yuheng Chen , Yaoqing Chu , Hui Shen , Jiayue Xu

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Abstract

A series of uranium and magnesium co-doped LN crystals (LN: U, Mg) were successfully grown using the modified vertical Bridgman method. At 532 nm, the response time of LN: U, Mg was approximately 2 s. The saturated diffraction efficiency, refractive index modulation, and sensitivity decreased first and then increased with the enhanced MgO doping concentration. The electron was the dominant carrier, and the diffusion was the main migration mechanism. When co-doped with 7 mol% MgO, the optical damage threshold of LN: U was significantly improved to be as high as 2.36 × 10⁵ W/cm². The result of the OH⁻ spectrum showed that only 7 mol% exceeded the real threshold concentration of MgO in LN: U, which is consistent with the calculated result based on the Li-vacancy model. In addition, the photorefractive centers and optical damage were also discussed.

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通过共同掺杂铀和镁改善铌酸锂的光折射响应时间和抗光损伤性

利用改进的垂直布里奇曼法成功生长了一系列铀和镁共掺杂的 LN 晶体（LN：U，Mg）。随着氧化镁掺杂浓度的增加，饱和衍射效率、折射率调制和灵敏度先下降后上升。电子是主要载流子，扩散是主要迁移机制。当共同掺杂 7 mol% MgO 时，LN：U 的光损伤阈值显著提高，高达 2.36 × 105 W/cm2。OH- 光谱结果显示，只有 7 mol% 的氧化镁超过了 LN: U 中氧化镁的实际阈值浓度，这与基于锂空穴模型的计算结果一致。此外，还讨论了光折射中心和光学损伤问题。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.