利用啁啾共振电离产生高强度阿秒脉冲

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英文篇名：High-intensity Attosecond Pulse Generation by Using Chirp Resonance Ionization 作者：沈志博 ; 刘航 英文作者：SHEN Zhi-bo;LIU Hang;School of Chemical and Environmental Engineering, Liaoning University of Technology; 关键词：高次谐波 ; 电荷共振增强电离 ; 阿秒脉冲 ; 抽运-探测激光场 英文关键词：high-order harmonics;;charge-resonance-enhanced-ionization;;attosecond pulse;;pump-probe laser field 中文刊名：LNGX 英文刊名：Journal of Liaoning University of Technology(Natural Science Edition) 机构：辽宁工业大学化学与环境工程学院; 出版日期：2019-06-12 11:16 出版单位：辽宁工业大学学报(自然科学版) 年：2019 期：v.39;No.188 基金：辽宁省教育厅基金(JL201615405);; 辽宁工业大学大学生创新创业项目(201703018) 语种：中文; 页：LNGX201904016 页数：4 CN：04 ISSN：21-1567/T 分类号：70-73

摘要

理论提出了一种利用啁啾共振电离产生高强度高次谐波和阿秒脉冲的方法。结果表明,在适当选取抽运与探测激光的延迟时间时,H2+谐波辐射效率有明显增强,并且形成一个连续平台区。理论分析表明,该现象是由电荷共振增强电离引起的。随后在探测激光场下引入啁啾调制,谐波截止能量得到延伸。最后,通过傅里叶变换可产生一个48 as的激光束。
        A method to produce the high-intensity high-order harmonics and attosecond pulses by using the chirp resonance ionization has been theoretically proposed. The results show that by properly choosing the delay time between the pump pulse and the probe pulse, the harmonic emission efficiency can be enhanced and a harmonic plateau can be obtained. Theoretical analyses show that the above phenomenon is caused by the charge-resonance-enhanced-ionization. Further, with the introduction of the chirp in the probe pulse, the harmonic cutoff can be extended. Finally, through the Fourier transform of some harmonics, a 48 as pulse can be produced.

引文

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