摘要
全无机金属卤化物钙钛矿材料的非线性光学效应对构建新型微纳光子器件具有重要意义。本文重点研究了微米尺度CsPbBr_(3)钙钛矿单晶颗粒的双光子发射特性,实验中基于声化学合成法制备了不同尺寸的CsPbBr_(3)微晶颗粒,通过对激发光能量密度、波长、偏振的调整,研究了其对双光子发光特性的影响。实验结果表明在室温下CsPbBr_(3)微晶即具有较强的双光子发光。波长相关的光致发光光谱表明,同一吸收带隙下,其发光峰位相对于单光子发射变化不大,且随着激发波长的增大双光子发射强度逐渐降低。此外,CsPbBr_(3)微晶颗粒双光子发射具有偏振依赖性行为,偏振角度在0°~360°范围内呈现四重对称性。上述CsPbBr_(3)微晶的双光子发光特性使其有望用于非线性集成器件。
The nonlinear optical effect of all-inorganic metal halide perovskite materials is important for the design of novel micro-and nano-photonic devices.In this paper,the two-photon luminescence of micro-scale CsPbBr_(3)perovskite single crystal particles is investigated.In the experiment,CsPbBr_(3)microcrystals with different sizes were prepared based on the sonochemistry synthesis method,and the variations of the two-photon luminescence were studied by adjusting the energy density,wave⁃length and polarization of the pump laser beam.The experimental results demonstrate that the CsPb⁃Br_(3) microcrystals possess strong two-photon luminescence at room temperature.The wavelength-de⁃pendent two-photon luminescence spectrum shows that under the same absorption band gap,the lumi⁃nescence peak position does not change much compared with the single-photon emission,and the twophoton emission intensity gradually decreases with the increase of excitation wavelength.In addition,the two-photon emission of CsPbBr_(3)microcrystals reveals polarization-dependent behavior and the po⁃larization angle presents quadruple symmetry in the range of 0°-360°.The two-photon luminescence responses of the CsPbBr_(3)microcrystals make them promising for nonlinear integrated devices.
作者
杨敏
岳鹏
廉岚淇
刘绍鼎
YANG Min;YUE Peng;LIAN Lan-qi;LIU Shao-ding(Key Laboratory of Advanced Transducers and Intelligence Control System,Ministry of Education,Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2022年第8期1207-1216,共10页
Chinese Journal of Luminescence
基金
国家自然科学基金(11874276,11574228)
山西省重点研发计划(201903D121131)资助项目。
作者简介
杨敏(1996-),女,山西运城人,硕士研究生,2018年于东北农业大学获得学士学位,主要从事微纳非线性光学的研究。E-mail:1452869237@qq.com;Corresponding Author:刘绍鼎(1982-),男,湖北襄阳人,博士,教授,博士生导师,2009年于武汉大学获得博士学位,主要从事微纳非线性光学、表面等离激元光子学、微纳光子器件方面的研究。E-mail:liushaoding@tyut.edu.cn。
