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Intensity dependence of laser-assisted attosecond photoionization spectra

  • Attosecond Pulses
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Laser Physics

Abstract

We study experimentally the influence of the intensity of the infrared (IR) probe field on attosecond pulse train (APT) phase measurements performed with the RABITT method (Reconstruction of Attosecond Beating by Interference in Two-Photon Transitions). We find that if a strong IR field is applied, the attosecond pulses will appear to have lower-than-actual chirp rates. We also observe the onset of the streaking regime in the breakdown of the weak-field RABITT conditions. We perform a Fourier-analysis of harmonic and sideband continuum states and show that the mutual phase relation of the harmonics can be extracted from higher Fourier components.

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Correspondence to M. Swoboda.

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Original Russian Text © Astro, Ltd., 2009.

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Swoboda, M., Dahlström, J.M., Ruchon, T. et al. Intensity dependence of laser-assisted attosecond photoionization spectra. Laser Phys. 19, 1591–1599 (2009). https://doi.org/10.1134/S1054660X09150390

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  • DOI: https://doi.org/10.1134/S1054660X09150390

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