Electron Wavepacket Interference Observed by Attosecond Transient Absorption Spectroscopy

Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 125)

Abstract

Attosecond time-resolved transient absorption spectroscopy is performed in a dense helium target by superimposing an attosecond pulse train (APT) with a moderately strong infrared field. We observe rapid oscillations of the absorption of the individual harmonics as a function of time-delay between the APT and IR field even for harmonic energies well below the ionization threshold. The phase dependence of these modulations on atto-chirp and IR intensity yields direct evidence for the interference of transiently bound electronic wavepackets as the underlying mechanism.

Keywords

Infrared Intensity Transient Absorption Spectroscopy Individual Harmonic Helium Target Attosecond Pulse Train 
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Notes

Acknowledgements

This research was supported by the NCCR Quantum Photonics (NCCR QP), a research instrument of the Swiss National Science Foundation (SNSF).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • L. Gallmann
    • 1
  • M. Holler
    • 1
  • F. Schapper
    • 1
  • U. Keller
    • 1
  1. 1.Physics DepartmentETH ZurichZurichSwitzerland

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