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<p>The modulation of laser pulse with high photon energies is an important tool for the observation and control of the dynamic of inner-shell electron in atoms and nucleon in atomic nuclear. We present a theoretical method for the reshaping of extreme ultraviolet (XUV) pulses by the modulation of an infrared (IR) pulse combining with the propagation effects of the XUV pulse in helium. The spectrum is redistributed within a specific frequency range around the coherent frequency of the atomic system, which allows for frequency tuning and spectral compression of the XUV pulse, significantly enhancing its radiative intensity at different frequencies. These findings deepen our understanding of the propagation effect and control mechanisms of XUV pulses in atomic media.</p>

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Spectral enhancement of narrowband XUV pulses at variable frequencies in helium

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Youda Wang,
  • Haohan Shi,
  • Juhao Yue,
  • Zheng Fang,
  • Liye Cheng,
  • Bitao Hu,
  • Zuoye Liu

摘要

The modulation of laser pulse with high photon energies is an important tool for the observation and control of the dynamic of inner-shell electron in atoms and nucleon in atomic nuclear. We present a theoretical method for the reshaping of extreme ultraviolet (XUV) pulses by the modulation of an infrared (IR) pulse combining with the propagation effects of the XUV pulse in helium. The spectrum is redistributed within a specific frequency range around the coherent frequency of the atomic system, which allows for frequency tuning and spectral compression of the XUV pulse, significantly enhancing its radiative intensity at different frequencies. These findings deepen our understanding of the propagation effect and control mechanisms of XUV pulses in atomic media.