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文章编号： 1672-6987（2024）06-0145-06； DOI： 10.16351/j.1672-6987.2024.06.018
郝琳红1a,1b,1c， 郭磊磊1a,1b， 王茂榕1a,1b， 赵秋玲1a,1b， 滕利华1a,1b*， 王霞1a,1b,2*(1. 青岛科技大学 a. 数理学院; b. 山东省新型光电材料与技术工程实验室; c. 材料科学与工程学院，
山东 青岛 266042； 2. 济南大学 物理科学与技术学院， 山东 济南 250022)
摘要： 研究了CsPbBr3钙钛矿量子点的非线性光吸收和光折射效应。采用飞秒激光Z-scan技术在400和800 nm的激发波长下测量发现CsPbBr3量子点呈现出饱和吸收和自散焦特性，分析表明两种效应均起源于单光子吸收，且800 nm处的饱和吸收效应明显强于400 nm, 而400 nm处的非线性折射效应明显强于800 nm。本工作制备的CsPbBr3量子点与其它钙钛矿材料相比表现出较为优异的非线性吸收和折射特性。
关键词： CsPbBr3； 量子点； Z-scan； 非线性吸收； 非线性折射
中图分类号： O 437.5文献标志码： A
引用格式： 郝琳红， 郭磊磊， 王茂榕, 等. CsPbBr3钙钛矿量子点的非线性光吸收和光折射效应［J］. 青岛科技大学学报(自然科学版), 2024, 45(6): 145-150.
HAO Linhong, GUO Leilei, WANG Maorong, et al. Nonlinear optical absorption and refraction effects of CsPbBr3 perovskite quantum dots［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2024， 45（6）： 145-150.
Nonlinear Optical Absorption and Refraction Effects of
CsPbBr3 Perovskite Quantum Dots
HAO Linhong1a,1b,1c, GUO Leilei1a,1b, WANG Maorong1a,1b,
ZHAO Qiuling1a,1b, TENG Lihua1a,1b, WANG Xia1a,1b,2
(1.a. College of Mathematics and Physic; b. Shandong Advanced Optoelectronic Materials and Technologies Engineering Laboratory;
c. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. School of Physics and Technology, University of Jinan, Jinan 250022, China)
Abstract: CsPbBr3 perovskite quantum dots were prepared, and their nonlinear optical absorption and refraction effects were studied. Measured by femtosecond laser Z-scan technology at 400 nm and 800 nm excitation wavelengths, it is found that CsPbBr3 quantum dots exhibit saturation absorption and self-defocusing. The analysis showed that both effects originated from single photon absorption, and the saturation absorption effect at 800 nm was obviously stronger than that at 400 nm, while the nonlinear refraction effect at 400 nm was obviously stronger than that at 800 nm. Compared with other perovskite materials, CsPbBr3 quantum dots prepared in this paper show excellent nonlinear absorption and refraction characteristics.
Key words: CsPbBr3; quantum dots; Z-scan; nonlinear absorption; nonlinear refraction
收稿日期： 2023-12-22
基金项目： 国家自然科学基金项目(11874232,12174211);山东省重点研发计划项目(2018GGX101008).
作者简介： 郝琳红(1997—),女,硕士研究生.*通信联系人.
