激光强度对Dy^(3+)离子掺杂玻璃上转换发光控制的影响（英文）  

Laser intensity influence on up-conversion luminescence control in Dy^(3+)-doped glass

作　　者：刘沛 程文静 齐大龙 郑烨 姚云华[1] 张诗按[1] LIU Pei;CHENG Wenjing;QI Dalong;ZHENG Ye;YAO Yunhua;ZHANG Shian(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China;School of Electronic and Electrical Engineering,Shangqiu Normal University,Shangqiu 476000,China)

机构地区：[1]华东师范大学精密光谱科学与技术国家重点实验室,上海200062 [2]商丘师范学院电子电气工程学院,河南商丘476000

出　　处：《量子电子学报》2018年第5期594-602,共9页Chinese Journal of Quantum Electronics

基　　金：Supported by National Natural Science Foundation of China(11474096,11604199,11747101);Natural Science Foundation of Henan Province(182102210117,17A140025,16A140030);Science and Technology Commission of Shanghai Municipality(14JC1401500)~~

摘　　要：稀土离子上转换发光是理解多光子激发过程和上转换发光机制的重要基础研究.用方波调制飞秒脉冲作为激发光源,理论、实验研究了Dy^(3+)掺杂玻璃的上转换发光调控,结果表明在较高、较低激光强度下上转换发光具有不同的控制效率.通过考虑高阶多光子吸收过程进一步研究了其物理控制机制,即上转换发光多光子吸收包括双光子和四光子吸收过程.在整个激发过程中,四光子吸收的相对权重随着激光强度增加而增加,由于双光子和四光子跃迁路径的相消干涉,上转换发光在不同激光强度下表现出不同的控制行为。在高激光强度下,观测稀土离子高阶多光子吸收过程为理解多光子吸收上转换发光机制提供了清晰的图像,并为调控上转换发光提供了新的方法。The up-conversion luminescence of rare-earth ions is an important fundamental research for understanding the multi-photon excitation processes and up-conversion luminescence mechanism. The upconversion luminescence control of Dy^（3＋）-doped glass are investigated theoretically and experimentally by using square wave modulated femtosecond pulse as excitation light source. Results show that up-conversion luminescence has different control efficiency with the higher or lower laser intensity. The physical control mechanism is further investigated by considering the higher-order multi-photon absorption process, and the up-conversion luminescence multi-photon absorption includes two-photon and four-photon absorption process. The relative weight of four-photon absorption in the whole excitation process increases with increasing of laser intensity. Due to the destructive interference between two-photon and four-photon transition pathways, up-conversion luminescence exhibits different control behaviors at different laser intensity. At high laser intensity, the observation of higher-order multi-photon absorption processes in rare earth ions can provide a clear physical picture for understanding the up-conversion luminescence mechanism, and a new way for tuning the up-conversion luminescence.

关 键 词：非线性光学 上转换发光 脉冲整形 多光子吸收 相干控制 

分 类 号：O437[机械工程—光学工程]