Volume 7, Issue 3
Isolated Attosecond Pulse Generation in a 800 nm Laser Field by Adding a Terahertz (THz) Pulse

Hui Du, Xin-Lei Ge, Yun-Tao Lin, Hui-Ying Zhong, Jing Guo & Xue-Shen Liu

J. At. Mol. Sci., 7 (2016), pp. 146-154.

Published online: 2016-07

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  • Abstract

We theoretically study the high-order harmonic and the isolated attosecond pulse generation in the near-infrared (IR) (3-fs, 800 nm) laser pulse by adding a terahertz (THz) controlling field with proper phases. It is found that the high-order harmonic spectrum in the IR pulse by adding a terahertz field is broader and smoother than that in the single IR pulse. The underlying physical mechanism is illustrated by means of the time-frequency analysis and the three-step model. We calculate the ionization rate by ADK model to further demonstrate the process of high-order harmonic generation. By superposing a proper range of harmonic spectrum, an isolated attosecond pulse with the duration of 71 as is obtained.

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COPYRIGHT: © Global Science Press

  • Email address

gjing@jlu.edu.cn (Jing Guo)

liuxs@jlu.edu.cn (Xue-Shen Liu)

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@Article{JAMS-7-146, author = {Du , HuiGe , Xin-LeiLin , Yun-TaoZhong , Hui-YingGuo , Jing and Liu , Xue-Shen}, title = {Isolated Attosecond Pulse Generation in a 800 nm Laser Field by Adding a Terahertz (THz) Pulse}, journal = {Journal of Atomic and Molecular Sciences}, year = {2016}, volume = {7}, number = {3}, pages = {146--154}, abstract = {

We theoretically study the high-order harmonic and the isolated attosecond pulse generation in the near-infrared (IR) (3-fs, 800 nm) laser pulse by adding a terahertz (THz) controlling field with proper phases. It is found that the high-order harmonic spectrum in the IR pulse by adding a terahertz field is broader and smoother than that in the single IR pulse. The underlying physical mechanism is illustrated by means of the time-frequency analysis and the three-step model. We calculate the ionization rate by ADK model to further demonstrate the process of high-order harmonic generation. By superposing a proper range of harmonic spectrum, an isolated attosecond pulse with the duration of 71 as is obtained.

}, issn = {2079-7346}, doi = {https://doi.org/10.4208/jams.022516.041916a}, url = {http://global-sci.org/intro/article_detail/jams/8143.html} }
TY - JOUR T1 - Isolated Attosecond Pulse Generation in a 800 nm Laser Field by Adding a Terahertz (THz) Pulse AU - Du , Hui AU - Ge , Xin-Lei AU - Lin , Yun-Tao AU - Zhong , Hui-Ying AU - Guo , Jing AU - Liu , Xue-Shen JO - Journal of Atomic and Molecular Sciences VL - 3 SP - 146 EP - 154 PY - 2016 DA - 2016/07 SN - 7 DO - http://doi.org/10.4208/jams.022516.041916a UR - https://global-sci.org/intro/article_detail/jams/8143.html KW - High-order harmonic generation, isolated attosecond pulse, terahertz pulse. AB -

We theoretically study the high-order harmonic and the isolated attosecond pulse generation in the near-infrared (IR) (3-fs, 800 nm) laser pulse by adding a terahertz (THz) controlling field with proper phases. It is found that the high-order harmonic spectrum in the IR pulse by adding a terahertz field is broader and smoother than that in the single IR pulse. The underlying physical mechanism is illustrated by means of the time-frequency analysis and the three-step model. We calculate the ionization rate by ADK model to further demonstrate the process of high-order harmonic generation. By superposing a proper range of harmonic spectrum, an isolated attosecond pulse with the duration of 71 as is obtained.

Du , HuiGe , Xin-LeiLin , Yun-TaoZhong , Hui-YingGuo , Jing and Liu , Xue-Shen. (2016). Isolated Attosecond Pulse Generation in a 800 nm Laser Field by Adding a Terahertz (THz) Pulse. Journal of Atomic and Molecular Sciences. 7 (3). 146-154. doi:10.4208/jams.022516.041916a
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