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Electron dynamics in laser-driven atoms near the continuum threshold

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dc.contributor.authorLiu, M.
dc.contributor.authorXu, S.
dc.contributor.authorHu, S.
dc.contributor.authorQuan, W.
dc.contributor.authorBecker, W.
dc.date.accessioned2024-12-02T10:12:36Z
dc.date.available2024-12-02T10:12:36Z
dc.date.issued2021
dc.description.abstract© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.Strong-field ionization and Rydberg-state excitation (RSE) near the continuum threshold exhibit two phenomena that have attracted a lot of recent attention: the low-energy structure (LES) just above and frustrated tunneling ionization just below the threshold. The former becomes apparent for longer laser wavelengths, while the latter has been especially investigated in the near infrared; both have been treated as separate phenomena so far. Here we present a unified perspective based on electron trajectories, which emphasizes the very important role of the electron-ion Coulomb interaction as expected in this energy region. Namely, those trajectories that generate the LES can also be recaptured into a Rydberg state. The coherent superposition of the contributions of such trajectories with different travel times (each generating one of the various LES peaks) causes an oscillation in the intensity dependence of the RSE yield, which is especially noticeable for longer wavelengths. The theory is illustrated by RSE experiments at 1800 nm, which agree very well with the theory with respect to position and period of the oscillation. The wavelength scaling of the RSE oscillation is also discussed. Our work establishes a solid relationship between processes below and above the threshold and sheds new light on atomic dynamics driven by intense laser fields in this critical energy region.
dc.format.extentС. 765-770
dc.identifier.citationElectron dynamics in laser-driven atoms near the continuum threshold / Liu, M. [et al.] // Optica. - 2021. - 8. - № 6. - P. 765-770. - 10.1364/OPTICA.418636
dc.identifier.doi10.1364/OPTICA.418636
dc.identifier.urihttps://www.doi.org/10.1364/OPTICA.418636
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85107281006&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000663363600001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/25534
dc.relation.ispartofOptica
dc.titleElectron dynamics in laser-driven atoms near the continuum threshold
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue6
oaire.citation.volume8
relation.isOrgUnitOfPublicationdcdb137c-0528-46a5-841b-780227a67cce
relation.isOrgUnitOfPublication.latestForDiscoverydcdb137c-0528-46a5-841b-780227a67cce
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