利用多周期空间非均匀啁啾场产生单个短阿秒脉冲
Generation of the isolated short attosecond pulse by a multicycle spatially inhomogeneous chirped field
韩岳峰 1张刚台 1白婷婷 2张依琳 1张倩 1赵曦3
作者信息
- 1. 宝鸡文理学院物理与光电技术学院,宝鸡 721016
- 2. 宝鸡文理学院数学与信息科学学院,宝鸡 721013
- 3. 黔南民族师范学院物理与电子科学学院,都匀 558000
- 折叠
摘要
提出了一种直接生成单个短阿秒脉冲的有效方案.采用数值求解一维含时薛定谔方程,理论研究了多周期空间非均匀啁啾场驱动预激发氦离子的高次谐波辐射和阿秒脉冲的产生.结果表明:在空间非均匀啁啾场作用下,谐波截止可扩展至1050阶次,并且高于300阶次以上的谐波是连续的.由于连续谱来自单一量子路径的贡献,滤出连续谱上880-1120阶次的谐波,直接产生了一个脉宽为11.4 as的单个脉冲.通过增加驱动脉冲的持续时间,可获得一个脉宽短至10 as的单个脉冲.
Abstract
An efficient scheme for producing an isolated short attosecond pulse is proposed.By numerically sol-ving one-dimensional time-dependent Schrödinger equation,the high-order harmonics and attosecond pulse generation of a pre-excited helium ion driven by a multicycle spatially inhomogeneous chirped field are investi-gated theoretically.The results show that the harmonic cutoff is significantly extended to the 1050th order and the harmonics beyond the 300th order are continuous in the spatially inhomogeneous chirped field.Because the su-percontinuum only derives from the contribution of the single quantum path and covers extremely a wide spectral width,an isolated 11.4 as pulse is directly generated by filtering out the harmonics of the 880th-1120th order in the supercontinuum.By increasing the duration time of the driving pulse,a single attosecond pulse as short as 10 as is obtained.
关键词
高次谐波辐射/孤立阿秒脉冲/量子路径控制/空间非均匀啁啾场Key words
High-order harmonic generation/Isolated attosecond pulse/Quantum path control/Spatially inho-mogeneous chirped field引用本文复制引用
基金项目
陕西省自然科学基础研究计划项目(2016JM1012)
陕西省教育厅专项科研计划项目(18JK0050)
宝鸡文理学院大学生创新创业训练计划项目(2019XJ067)
宝鸡文理学院大学生创新创业训练计划项目(2019XJ083)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据