Phase Measurement of a Fano Resonance Using Tunable Attosecond Pulses
- Jimenez-Galan, A.
- Kotur, Marija
- Guenot, Diego
- Kroon, David
- Witting Larsen, Esben
- Louisy, Maite
- Bengtsson, Samuel
- Miranda, Miguel
- Mauritsson, Johan
- Arnold, Cord
- Canton, Sophie
- Gisselbrecht, Mathieu
- Carette, T.
- Dahlstrom, J. M.
- Lindroth, E.
- Maquet, A.
- Argenti, L.
- Martin, F.
- L'Huillier, Anne
DOIAbstract
We study photoionization of argon atoms close to the 3s(2)3p(6) -> 3s(1)3p(6)4p Fano resonance using an attosecond pulse train and a weak infrared probe field. An interferometric technique combined with tunable attosecond pulses allows us to determine the phase of the photoionization amplitude as a function of photon energy. We interpret the experimental results using an analytical two-photon model based on the Fano formalism and obtain quantitative agreement
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