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Details

Autor(en) / Beteiligte
Titel
Ultraviolet supercontinuum generation driven by ionic coherence in a strong laser field
Ist Teil von
  • Nature communications, 2022-07, Vol.13 (1), p.4080-4080, Article 4080
Ort / Verlag
London: Nature Publishing Group
Erscheinungsjahr
2022
Link zum Volltext
Quelle
EZB-FREE-00999 freely available EZB journals
Beschreibungen/Notizen
  • Abstract Supercontinuum (SC) light sources hold versatile applications in many fields ranging from imaging microscopic structural dynamics to achieving frequency comb metrology. Although such broadband light sources are readily accessible in the visible and near infrared regime, the ultraviolet (UV) extension of SC spectrum is still challenging. Here, we demonstrate that the joint contribution of strong field ionization and quantum resonance leads to the unexpected UV continuum radiation spanning the 100 nm bandwidth in molecular nitrogen ions. Quantum coherences in a bunch of ionic levels are found to be created by dynamic Stark-assisted multiphoton resonances following tunneling ionization. We show that the dynamical evolution of the coherence-enhanced polarization wave gives rise to laser-assisted continuum emission inside the laser field and free-induction decay after the laser field, which jointly contribute to the SC generation together with fifth harmonics. As proof of principle, we also show the application of the SC radiation in the absorption spectroscopy. This work offers an alternative scheme for constructing exotic SC sources, and opens up the territory of ionic quantum optics in the strong-field regime.
Sprache
Englisch
Identifikatoren
ISSN: 2041-1723
eISSN: 2041-1723
DOI: 10.1038/s41467-022-31824-0
Titel-ID: cdi_doaj_primary_oai_doaj_org_article_34a31cc34ec7443b8654bdba24438b6c

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