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利用多周期空间非均匀啁啾场产生单个短阿秒脉冲

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  • 国家科技期刊平台
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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。
Generation of the isolated short attosecond pulse by a multicycle spatially inhomogeneous chirped field
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.

High-order harmonic generationIsolated attosecond pulseQuantum path controlSpatially inho-mogeneous chirped field

韩岳峰、张刚台、白婷婷、张依琳、张倩、赵曦

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宝鸡文理学院物理与光电技术学院,宝鸡 721016

宝鸡文理学院数学与信息科学学院,宝鸡 721013

黔南民族师范学院物理与电子科学学院,都匀 558000

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

陕西省自然科学基础研究计划项目陕西省教育厅专项科研计划项目宝鸡文理学院大学生创新创业训练计划项目宝鸡文理学院大学生创新创业训练计划项目

2016JM101218JK00502019XJ0672019XJ083

2024

10.19855/j.1000-0364.2024.034001

原子与分子物理学报
四川大学,四川省物理学会,中国物理学会原子与分子物理专业委员会

原子与分子物理学报

北大核心
影响因子：0.296
ISSN：1000-0364
年,卷(期)：2024.41(3)
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