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IOP Publishing, Journal of Physics: Conference Series, 9(635), p. 092137, 2015

DOI: 10.1088/1742-6596/635/9/092137

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Phase Measurement of a Fano Resonance Using Tunable Attosecond Pulses

Journal article published in 2015 by A. Jiménez-Galánz, M. Kotur, D. Guénot, D. Kroon, E. W. Larsen, M. Louisy, S. Bengtsson, M. Miranda, J. Mauritsson ORCID, C. L. Arnold, S. E. Canton, M. Gisselbrecht, T. Carette, J. M. Dahlstrom, E. Lindroth and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

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.