近红外飞秒激光作用下金膜中的超快电子动力学

赵琼琼; 袁伟; 杜鹃; 马国宏; 冷雨欣

doi:10.37188/CJL.20210262

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近红外飞秒激光作用下金膜中的超快电子动力学

材料合成及性能 | 更新时间：2021-11-23

- 近红外飞秒激光作用下金膜中的超快电子动力学
  增强出版
- Ultrafast Electron Dynamics in Gold Films Probed by Near-infrared Femtosecond Laser
- 发光学报 2021年42卷第11期页码：1787-1794
- 作者机构：
  
  1.上海大学　理学院，上海　200444
  2.中国科学院上海光学精密机械研究所　强场激光物理国家重点实验室，上海　201800
- 作者简介：
  
  [ "赵琼琼(1996-)，女，山东曲阜人，硕士研究生，2018年于山东大学获得学士学位，主要从事飞秒激光作用下金膜中电子动力学的研究。E-mail: zhaoqiongqiong@siom.ac.cn" ]
  [ "杜鹃(1980-)，女，山东潍坊人，博士，研究员，博士研究生导师，2007年于中国科学院上海光学精密机械研究所获得博士学位，主要从事超短脉冲激光与功能材料相互作用的研究。E-mail: dujuan@mail.siom.ac.cn" ]
  [ "马国宏(1969-)，男，河南信阳人，博士，教授，2001年于复旦大学获得博士学位，主要从事超快光子学和太赫兹光学的研究。Email: ghma@staff.shu.edu.cn" ]
  [ "冷雨欣(1975-)，男，上海人，博士，研究员，2002年于中国科学院上海光学精密机械研究所获得博士学位，主要从事超强超短激光技术的研究。E-mail: lengyuxin@siom.ac.cn" ]
- 基金信息：
  
  国家重点研发计划(2017YFE0123700);国家自然科学基金(61925507;61875211;61905264);中国科学院创新交叉团队资助项目
- DOI：10.37188/CJL.20210262
  中图分类号： O482.31
- 纸质出版日期：2021-11-01，
  
  收稿日期：2021-08-05，
  
  修回日期：2021-08-30，
- 稿件说明：
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赵琼琼, 袁伟, 杜鹃, 等. 近红外飞秒激光作用下金膜中的超快电子动力学[J]. 发光学报, 2021,42(11):1787-1794.

QIONG-QIONG ZHAO, WEI YUAN, JUAN DU, et al. Ultrafast Electron Dynamics in Gold Films Probed by Near-infrared Femtosecond Laser. [J]. Chinese journal of luminescence, 2021, 42(11): 1787-1794.
赵琼琼, 袁伟, 杜鹃, 等. 近红外飞秒激光作用下金膜中的超快电子动力学[J]. 发光学报, 2021,42(11):1787-1794. DOI： 10.37188/CJL.20210262.

QIONG-QIONG ZHAO, WEI YUAN, JUAN DU, et al. Ultrafast Electron Dynamics in Gold Films Probed by Near-infrared Femtosecond Laser. [J]. Chinese journal of luminescence, 2021, 42(11): 1787-1794. DOI： 10.37188/CJL.20210262.

摘要

利用超快泵浦探测技术，研究了近红外飞秒强激光脉冲作用下，金膜中的超快电子动力学过程。研究发现，800 nm飞秒激光激发后，金膜的瞬态反射率存在一个下降过程。通过对金膜的瞬态反射率光谱进行分析和模拟，发现主要是自由电子弛豫和带间双光子跃迁这两种电子动力学过程综合作用的结果。利用双温模型，模拟了800 nm飞秒激光作用下金膜的温度弛豫和瞬态反射率变化过程，理论计算结果与实验结果符合良好。

Abstract

Using ultrafast pump-probe technology

the ultrafast electron dynamics in gold films are investigated by near-infrared femtosecond laser. Transient reflectivity decrease after the 800 nm femtosecond laser excitation is observed. By analyzing and simulating the transient reflectivity spectrum difference

we found that it is mainly the result from the combined action of two kinds of electron dynamics: free electron relaxation and interband two-photon transitions. The two-temperature model is used to simulate the temperature relaxation and transient reflectivity difference

and the simulated results are in good agreement with the experimental results.

关键词

泵浦探测技术近红外飞秒激光金膜超快电子动力学瞬态反射率

Keywords

pump-probe technologynear-infrared femtosecond lasergold filmultrafast electron dynamicstransient reflectivity

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