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. © Springer-Verlag Berlin Heidelberg 2012.
CITATION STYLE
Gallmann, L., Holler, M., Schapper, F., & Keller, U. (2012). Electron wavepacket interference observed by attosecond transient absorption spectroscopy. In Springer Proceedings in Physics (Vol. 125, pp. 199–201). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-642-28948-4_33
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