dc.contributor.authorSabbar, Mazyar
dc.contributor.authorTimmers, Henry
dc.contributor.authorChen, Yi-Jen
dc.contributor.authorPymer, Allison K.
dc.contributor.authorLoh, Zhi-Heng
dc.contributor.authorSayres, Scott G.
dc.contributor.authorPabst, Stefan
dc.contributor.authorSantra, Robin
dc.contributor.authorLeone, Stephen R.
dc.identifier.citationSabbar, M., Timmers, H., Chen, Y.-J., Pymer, A. K., Loh, Z.-H., Sayres, S. G., et al. (2017). State-resolved attosecond reversible and irreversible dynamics in strong optical fields. Nature Physics, 13(5), 472-478.en_US
dc.description.abstractStrong-field ionization (SFI) is a key process for accessing real-time quantum dynamics of electrons on the attosecond timescale. The theoretical foundation of SFI was pioneered in the 1960s, and later refined by various analytical models. While asymptotic ionization rates predicted by these models have been tested to be in reasonable agreement for a wide range of laser parameters, predictions for SFI on the sub-laser-cycle timescale are either beyond the scope of the models or show strong qualitative deviations from full quantum-mechanical simulations. Here, using the unprecedented state specificity of attosecond transient absorption spectroscopy, we follow the real-time SFI process of the two valence spin–orbit states of xenon. The results reveal that the irreversible tunnelling contribution is accompanied by a reversible electronic population that exhibits an observable spin–orbit-dependent phase delay. A detailed theoretical analysis attributes this observation to transient ground-state polarization, an unexpected facet of SFI that cannot be captured by existing analytical models that focus exclusively on the production of asymptotic electron/ion yields.en_US
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent20 p.en_US
dc.relation.ispartofseriesNature Physicsen_US
dc.rights© 2017 Macmillan Publishers Limited, part of Springer Nature. This is the author created version of a work that has been peer reviewed and accepted for publication by Nature Physics, Macmillan Publishers Limited. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1038/nphys4027].en_US
dc.subjectAtomic and molecular interactions with photonsen_US
dc.subjectAttosecond scienceen_US
dc.titleState-resolved attosecond reversible and irreversible dynamics in strong optical fieldsen_US
dc.typeJournal Article
dc.contributor.researchCentre for Optical Fibre Technologyen_US
dc.contributor.researchThe Photonics Instituteen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionAccepted versionen_US

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