Phase Measurement of a Fano Resonance Using Tunable Attosecond Pulses

A Jiménez-Galánz (1) , M Kotur (2) , D Guénot (2) , D Kroon (2) , E W Larsen (2) , M Louisy (2) , S Bengtsson (2) , M Miranda (2) , J Mauritsson (2) , C L Arnold (2) , S E Canton (3) , M Gisselbrecht (2) , T Carette (4) , J M Dahlstrom (4) , E Lindroth (5) , A Maquet (6) , L Argenti (1) , F Martín (1, 7, 8) , A L'Huillier (2)

1 UAM - Universidad Autónoma de Madrid
2 Department of Physics
3 Department of Synchrotron Radiation Research
4 Stockholm University
5 APSU - Atomic Physics
6 LCPMR - Laboratoire de Chimie Physique - Matière et Rayonnement
7 IFIMAC - Condensed Matter Physics Center
8 Instituto IMDEA Nanociencia [Madrid]

We study photoionization of argon atoms close to the 3s23p6 → 3s13p64p 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.

Domaines: Physique [physics]

A Jiménez-Galánz, M Kotur, D Guénot, D Kroon, E W Larsen, et al.. Phase Measurement of a Fano Resonance Using Tunable Attosecond Pulses. Journal of Physics: Conference Series, 2015, 635 (9), pp.092137 ⟨10.1088/1742-6596/635/9/092137⟩. ⟨hal-01266791⟩