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Chirp duration effect on high-order harmonic spectra

  • Regular Article – Ultraintense and Ultrashort Laser Fields
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The European Physical Journal D Aims and scope Submit manuscript

Abstract

Chirp duration effect on high-order harmonic spectra has been theoretically studied. The results show that (i) as the chirp duration increases, both the harmonic cutoff and the harmonic intensity are enhanced. Meanwhile, at some given chirp duration, the maximum harmonic cutoff and harmonic intensity can be found (i.e., 30 fs in this paper). (ii) For the cases of the shorter and longer chirp duration, the variations of the harmonic cutoff and the harmonic intensity show a larger and smaller trend as the chirp delay changes, respectively. (iii) Furthermore, with the introduction of the two-color field scheme, the harmonic spectrum from the shorter chirp duration can produce a stronger harmonic intensity, while the changes of the harmonic cutoff and the harmonic intensity are very small for the longer chirp duration two-color pulse case. That is to say, the shorter chirp duration is beneficial to the combined field scheme, while the longer chirp duration is suitable for the single-color field scheme. (iv) Finally, three isolated attosecond pulses of 84 as, 88 as and 25 as can be generated when using the shorter and longer chirp duration cases, respectively.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The data can be obtained by sending a email to author.]

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Acknowledgements

This work was supported the Natural Science Foundation of Liaoning Province, China (Grants No. 2019-MS-167), the Basic Research Project of Liaoning Provincial Education Department, China (Grants No. JJL201915405), the Youth Project of Liaoning Education Department, China, and the Innovation Project of University Students, China (Grants Nos. 202110154004 and X2021057).

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Authors and Affiliations

  1. Laboratory of Modern Physics, Liaoning University of Technology, Jinzhou, 121000, China

    Hang Liu, Yuning Wang, Siqi Zhou & Liqiang Feng

  2. Department of Pathophysiology, Basic Medical College of Zhengzhou University, Zhengzhou, 450001, China

    Yan Qiao

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  1. Hang Liu
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  2. Yuning Wang
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  3. Siqi Zhou
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  4. Yan Qiao
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  5. Liqiang Feng
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Contributions

Hang Liu, Yuning Wang, and Siqi Zhou calculated and analyzed the results of this paper.

Yan Qiao wrote the first draft.

Liqiang Feng was the corresponding author.

Corresponding author

Correspondence to Liqiang Feng.

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Liu, H., Wang, Y., Zhou, S. et al. Chirp duration effect on high-order harmonic spectra. Eur. Phys. J. D 75, 292 (2021). https://doi.org/10.1140/epjd/s10053-021-00302-5

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