Probing Fano resonances with ultrashort pulses

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dc.identifier.uri Zhao, Jing Lein, Manfred 2017-04-06T08:51:24Z 2017-04-06T08:51:24Z 2012
dc.identifier.citation Zhao, Jing; Lein, Manfred: Probing Fano resonances with ultrashort pulses. In: New Journal of Physics 14 (2012), 65003. DOI:
dc.description.abstract In this paper, autoionizing states in the one-dimensional helium atom are investigated by numerical solution of the time-dependent two-electron Schrodinger equation. The atom is irradiated by an extreme ultraviolet (XUV) attosecond pulse and a time-delayed infrared few-cycle laser pulse. The XUV pulse populates a superposition of doubly excited states, leading to Fano resonances in the photoelectron spectrum. It is demonstrated that the Fano line profile is strongly modified by the presence of the laser field. Laser-induced coupling between the different doubly excited states causes the population of autoionizing states that cannot be reached by absorbing a single XUV photon from the ground state. The resulting additional peaks in the photoelectron spectrum are modulated as a function of time delay. Furthermore, the photoelectron spectrum exhibits a fringe pattern that is determined by the time delay but is independent of the details of the laser pulse. eng
dc.description.sponsorship DFG/QUEST
dc.description.sponsorship China Scholarship Council
dc.language.iso eng
dc.publisher Bristol : IOP Publishing Ltd.
dc.relation.ispartofseries New Journal of Physics 14 (2012)
dc.rights CC BY-NC-SA 3.0 Unported
dc.subject double-excitation states eng
dc.subject autoionizing states eng
dc.subject extreme-ultraviolet eng
dc.subject attosecond eng
dc.subject fields eng
dc.subject light eng
dc.subject.ddc 530 | Physik ger
dc.title Probing Fano resonances with ultrashort pulses
dc.type article
dc.type Text
dc.relation.essn 1367-2630
dc.bibliographicCitation.volume 14
dc.bibliographicCitation.firstPage 65003
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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