引用本文格式: Li Yi,Feng Li-Qiang. Controlling laser delay and phase of two-color mid-infrared field to produce water window photon [J]. J. At. Mol. Phys., 2023, 40(1): 014001 (in Chinese) [李义,冯立强. 双色中红外激光场延迟及相位调控产生水窗区间光子 [J]. 原子与分子物理学报, 2023, 40(1): 014001] |
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双色中红外激光场延迟及相位调控产生水窗区间光子 |
Controlling laser delay and phase of two-color mid-infrared field to produce water window photon |
摘要点击 419 全文点击 136 投稿时间:2021-10-21 修订日期:2021-11-13 |
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DOI编号
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中文关键词
高次谐波 激光延迟 激光相位 双色场 水窗区谐波光谱 |
英文关键词
high-order harmonic generation time delay laser phase two-color field water window harmonic spectra |
基金项目
省市自然科学基金 |
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中文摘要
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理论研究了双色中红外激光场时间延迟及相位对高次谐波光谱的影响。结果表明:当激光延迟为-1.0 fs,激光相位为0.2π和0时,谐波截止能量可以得到有效延伸,并且获得一个超宽水窗区间谐波连续平台区。此外,谐波光谱的延伸与控制场波长关系不大,即,在上述激光延迟和相位下,控制场波长在2300 nm到2700 nm区间时都可获得水窗区谐波光谱。最后,叠加光谱连续区的谐波可获得35 as的水窗区孤立阿秒脉冲。 |
英文摘要
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The effects of time delay and phase of two-color mid-infrared field on the high-order harmonic spectra have been theoretically studied. It is shown that when the time delay and phases are chosen to be -1.0 fs, 0.2π and 0, respectively, the harmonic cutoff can be remarkably extended, showing an ultrabroad water window harmonic plateau. Furthermore, the harmonic extension is not very sensitive to the controlling laser wavelength. For instance, in the cases of the above time delay and phases, the water window harmonic plateau can also be obtained when the controlling wavelength is chosen from 2300 nm to 2700 nm. Finally, by superposing the harmonics on the spectral plateau, the water window isolated attosecond pulse with the duration of 35 as can be obtained. |