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Ultrafast Resonant State Formation by the Coupling of Rydberg and Dark Autoionizing States

Mangaljit SinghInstitut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, CanadaM. A. FareedDepartment of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USAV. A. BiruliaMoscow Institute of Physics and Technology (National Research University), Institutskiy pereulok. 9, Dolgoprudny 141701, RussiaA. I. MagunovProkhorov General Physics Institute of the Russian Academy of Sciences, Vavilova Street, 38, Moscow 119991, RussiaAlexei N. Grum-GrzhimailoSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991, RussiaPhilippe LassondeInstitut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, CanadaAntoine LaraméeInstitut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, CanadaRomain MarcelinoInstitut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, CanadaRamin Ghahri ShirinabadiInstitut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, CanadaFrançois LégaréInstitut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, CanadaT. OzakiInstitut national de la recherche scientifique-Énergie Matériaux Télécommunications, 1650 Lionel-Boulet, Varennes, Québec J3X 1P7, CanadaV. V. StrelkovInstitute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov Street, Nizhny Novgorod 603950, Russia

2023en

ABI

Annotatsiya

Studying the dynamics of dark states is challenging due to their inability to undergo single-photon emission or absorption. This challenge is made even more difficult for dark autoionizing states owing to their ultrashort lifetime of a few femtoseconds. High-order harmonic spectroscopy recently appeared as a novel method to probe the ultrafast dynamics of a single atomic or molecular state. Here, we demonstrate the emergence of a new type of ultrafast resonance state as a manifestation of coupling between Rydberg and a dark autoionizing state dressed by a laser photon. Through high-order harmonic generation, this resonance results in extreme ultraviolet light emission that is more than one order of magnitude stronger than for the off-resonance case. The induced resonance can be leveraged to study the dynamics of a single dark autoionizing state and the transient changes in the dynamics of real states due to their overlap with the virtual laser-dressed states. In addition, the present results allow the generation of coherent ultrafast extreme ultraviolet light for advanced ultrafast science applications.

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Identifikatorlar

DOI: 10.1103/physrevlett.130.073201

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