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<p>Here we harness soliton dynamics in a hollow-core fibre to generate attosecond laser pulses spanning the deep ultraviolet (DUV) to the near infrared, and we record their electric-field waveforms using nonlinear photoconductive sampling. By combining these techniques, we measure ultrashort pulses containing a soliton at optical wavelengths and generated a resonant dispersive wave covering the DUV regime with a total pulse duration of 350 attoseconds full width at half maximum of the squared field, demonstrating the extension of the electric-field sampling bandwidth to ultrashort wavelengths. Therefore, we provide a flexible and efficient route to the generation of intense isolated attosecond pulses complementary to those based on high-harmonic generation in gases, in a spectral range particularly interesting for studies in solids and in molecules. Finally, we show that these subcycle DUV–near-infrared pulses provide sufficient intensities to ionize argon and, thus, access attosecond strong-field laser physics in these spectral regions.</p>

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Field-resolved attosecond solitons

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月13日

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  • Amelie M. Heinzerling,
  • Francesco Tani,
  • Manoram Agarwal,
  • Vladislav S. Yakovlev,
  • Ferenc Krausz,
  • Nicholas Karpowicz

摘要

Here we harness soliton dynamics in a hollow-core fibre to generate attosecond laser pulses spanning the deep ultraviolet (DUV) to the near infrared, and we record their electric-field waveforms using nonlinear photoconductive sampling. By combining these techniques, we measure ultrashort pulses containing a soliton at optical wavelengths and generated a resonant dispersive wave covering the DUV regime with a total pulse duration of 350 attoseconds full width at half maximum of the squared field, demonstrating the extension of the electric-field sampling bandwidth to ultrashort wavelengths. Therefore, we provide a flexible and efficient route to the generation of intense isolated attosecond pulses complementary to those based on high-harmonic generation in gases, in a spectral range particularly interesting for studies in solids and in molecules. Finally, we show that these subcycle DUV–near-infrared pulses provide sufficient intensities to ionize argon and, thus, access attosecond strong-field laser physics in these spectral regions.