CsPbBr_(3)钙钛矿量子点的非线性光吸收和光折射效应  

Nonlinear Optical Absorption and Refraction Effects of CsPbBr_(3)Perovskite Quantum Dots

作　　者：郝琳红 郭磊磊 王茂榕 赵秋玲[1,2] 滕利华[1,2] 王霞[1,2,4] HAO Linhong;GUO Leilei;WANG Maorong;ZHAO Qiuling;TENG Lihua;WANG Xia(College of Mathematics and Physic,Qingdao University of Science and Technology,Qingdao 266042,China;Shandong Advanced Optoelectronic Materials and Technologies Engineering Laboratory,Qingdao University of Science and Technology,Qingdao 266042,China;College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;School of Physics and Technology,University of Jinan,Jinan 250022,China)

机构地区：[1]青岛科技大学数理学院,山东青岛266042 [2]青岛科技大学山东省新型光电材料与技术工程实验室,山东青岛266042 [3]青岛科技大学材料科学与工程学院,山东青岛266042 [4]济南大学物理科学与技术学院,山东济南250022

出　　处：《青岛科技大学学报（自然科学版）》2024年第6期145-150,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(11874232,12174211);山东省重点研发计划项目(2018GGX101008)。

摘　　要：研究了CsPbBr_(3)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CsPbBr_(3)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CsPbBr_(3)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。CsPbBr_(3)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 CsPbBr_(3)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,CsPbBr_(3)quantum dots prepared in this paper show excellent nonlinear absorption and refraction characteristics.

关 键 词：CsPbBr_(3) 量子点 Z-SCAN 非线性吸收 非线性折射 

分 类 号：O437.5[机械工程—光学工程]