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Attosecond photoionization dynamics with stimulated core-valence transitions
Stockholm University, Faculty of Science, Department of Physics. Center for Free-Electron Laser Science, Germany; Max Planck Institute for the Physics of Complex Systems, Germany.
Number of Authors: 3
2016 (English)In: physical review a, ISSN 2469-9926, Vol. 93, no 3, 033413Article in journal (Refereed) Published
Abstract [en]

We investigate ionization of neon atoms by an isolated attosecond pump pulse in the presence of two coherent extreme ultraviolet or x-ray probe fields. The probe fields are tuned to a core-valence transition in the residual ion and induce spectral shearing of the photoelectron distributions. We show that the photoelectron-ion coincidence signal contains an interference pattern that depends on the temporal structure of the attosecond pump pulse and the stimulated core-valence transition. Many-body perturbation theory is used to compute atomic response times for the processes and we find strikingly different behavior for stimulation to the outer-core hole (2p <-> 2s) and stimulation to the inner-core hole (2p <-> 1s). The response time of the inner-core transition is found to be comparable to that of state-of-the-art laser-based characterization techniques for attosecond pulses.

Place, publisher, year, edition, pages
2016. Vol. 93, no 3, 033413
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-129673DOI: 10.1103/PhysRevA.93.033413ISI: 000372485200012OAI: diva2:930344
Available from: 2016-05-23 Created: 2016-04-27 Last updated: 2016-05-23Bibliographically approved

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Dahlström, Jan Marcus
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