激光强度对Dy3+离子掺杂玻璃上转换发光控制的影响

J4 ›› 2018, Vol. 35 ›› Issue (5): 594-602.

激光强度对Dy3+离子掺杂玻璃上转换发光控制的影响

刘沛1，程文静2，齐大龙1，郑烨1，姚云华1，张诗按1

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

收稿日期:2017-05-18 修回日期:2017-05-30 出版日期:2018-09-28 发布日期:2018-09-29
通讯作者: 张诗按（1978-），福建泉州人，博士，研究员，研究方向为超快量子调控和压缩超高速摄影。 E-mail: sazhang@phy.ecnu.edu.cn
基金资助:
Supported by National Natural Science Foundation of China (中国国家自然科学基金，11474096，11604199), Science and Technology Commission of Shanghai Municipality (上海市基础研究重点项目，14JC1401500), Higher Education Key Program of He’nan Province of China (河南省高等学校重点科研项目， 17A140025，16A140030

Laser intensity influence on up-conversion luminescence control in Dy3+-doped glass

LIU Pei1, CHENG Wenjing2, QI Dalong1, ZHENG Ye1, YAO Yunhua1, ZHANG Shian1

1 State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China; 2 School of Electronic & Electrical Engineering, Shangqiu Normal University, Shangqiu 476000, China

Received:2017-05-18 Revised:2017-05-30 Published:2018-09-28 Online:2018-09-29

摘要/Abstract

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Dy3+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。

关键词: 量子光学；上转换发光；脉冲整形；相干控制；多光子吸收

Abstract:

he up-conversion luminescence of rare-earth ions is an important fundamental research for understanding the multi-photon excitation processes and up-conversion luminescence mechanisms. The up-conversion luminescence control of Dy3+-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 provide a new way for tuning the up-conversion luminescence.

Key words: quantum optics; up-conversion fluorescence; pulse shaping; coherent control; multi-photon absorption

刘沛1，程文静2，齐大龙1，郑烨1，姚云华1，张诗按1. 激光强度对Dy3+离子掺杂玻璃上转换发光控制的影响[J]. J4, 2018, 35(5): 594-602.

LIU Pei1, CHENG Wenjing2, QI Dalong1, ZHENG Ye1, YAO Yunhua1, . Laser intensity influence on up-conversion luminescence control in Dy3+-doped glass[J]. J4, 2018, 35(5): 594-602.

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