Influence of final state interactions in attosecond photoelectron interferometry

ORAL  · Invited

Abstract

Fano resonances are ubiquitous phenomena appearing in many fields of physics, e.g., atomic or molecular photoionization, or electron transport in quantum dots. Recently, attosecond interferometric techniques have been used to measure the amplitude and phase of photoelectron wave packets close to Fano resonances in argon and helium, allowing for the retrieval of the temporal dynamics of the photoionization process. This work [1] examines the photoionization of argon atoms close to the 3⁢𝑠1⁢3⁢𝑝6⁢4⁢𝑝 autoionizing state using an interferometric technique with high spectral resolution. The phase shows a monotonic 2⁢𝜋 variation across the resonance or a nonmonotonic less than 𝜋 variation depending on experimental conditions, e.g., the probe laser bandwidth. State-of-the-art calculations show that the measured phase is influenced by the interaction between final states reached by two-photon transitions. This work will illustrate the results obtained with one of these methods, which is based on an extension of the Newstock close-coupling atomic ionization code that semiempirically includes spin-orbit interaction in the Ar+ parent ion.

[1] S. Luo et al., Phys. Rev. Research 6, 043271 (2024).

*The authors acknowledge support from the Swedish Research Council (2013-8185, 2016-04907, 2018-03731, 2020-0520, 2020-03315, 2020-06384, 2023-04603), the ERC (advanced grant QPAP, 884900) and the Knut and Alice Wallenberg Foundation. This work was developed in the framework of the COST action CA18222 Attosecond Chemistry (AttoChem) supported by ECST. A.L. and M.A. are partly supported by the Wallenberg Center for Quantum Technology (WACQT) funded by the Knut and Alice Wallenberg Foundation. L.A. and C.M. acknowledge the NSF Grant No. PHY-1912507. R.Y.B. and F.M. acknowledge the Ministerio de Ciencia e Innovación MICINN (Spain) through projects PID2022-138288NB-C31 and PID2022-138288NB-C32, the Severo Ochoa Programme for Centres of Excellence in R & D (CEX2020-001039-S) and the María de Maeztu Programme for Units of Excellence in R & D (CEX2018-000805-M). XCHEM calculations were performed at the Marenostrum Barcelona Supercomputer Center and UAM's CCC.

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Presenters

  • Luca Argenti

    • University of Central Florida

Authors

  • Luca Argenti

    • University of Central Florida

  • S Luo

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Robin Weissenbilder

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Hugo Laurell

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Roger Y Bello

    • Departamento de Química Física Aplicada, Módulo 14, Universidad Autónoma de Madrid, E-28049 Madrid, Spain

  • Carlos Marante

    • Department of Physics, University of Central Florida, Orlando, Florida 32816, USA

  • Mattias Ammitzboll

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Lana Neoricic Maclot

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Anton Ljungdahl

    • Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden

  • Richard Squibb

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Raimund Feifel

    • Department of Physics, University of Gothenburg, Origovägen 6B, 41296 Gothenburg, Sweden

  • Mathieu Gisselbrecht

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Cord L Arnold

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Fernando Martin

    • Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain

  • Eva Lindroth

    • Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden

  • David Busto

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden

  • Anne L'Huillier

    • Department of Physics, Lund University, Box 118, 22100 Lund, Sweden