Attosecond Dynamics Through A Fano Resonance: Monitoring The Birth Of A Photoelectron

Abstract

The dynamics of quantum systems are encoded in the amplitude and phase of wave packets. However, the rapidity of electron dynamics on the attosecond scale has precluded the complete characterization of electron wave packets in the time domain. Using spectrally resolved electron interferometry, we were able to measure the amplitude and phase of a photoelectron wave packet created through a Fano autoionizing resonance in helium. In our setup, replicas obtained by two-photon transitions interfere with reference wave packets that are formed through smooth continua, allowing the full temporal reconstruction, purely from experimental data, of the resonant wave packet released in the continuum. In turn, this resolves the buildup of the autoionizing resonance on an attosecond time scale. Our results, in excellent agreement with ab initio time-dependent calculations, raise prospects for detailed investigations of ultrafast photoemission dynamics governed by electron correlation, as well as coherent control over structured electron wave packets.

Publication Date

11-11-2016

Publication Title

Science

Volume

354

Issue

6313

Number of Pages

734-738

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1126/science.aah5188

Socpus ID

84994484701 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84994484701

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