| Download | - View final version: Tracking the ionization site in neutral molecules (PDF, 2.8 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevLett.127.213201 |
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| Author | Search for: Ortmann, L.ORCID identifier: https://orcid.org/0000-0002-2665-8471; Search for: Alshafey, A.; Search for: Staudte, A.1; Search for: Landsman, A. S. |
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| Affiliation | - National Research Council Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Abstract | When a diatomic molecule is exposed to intense light, the valence electron may tunnel from a higher potential (corresponding to an upfield atom) due to the suppressed internuclear barrier. This process is known as ionization enhancement and is a key mechanism in strong field ionization of molecules. Alternatively, the bound electron wave function can evolve adiabatically in the laser field, resulting in ionization from the downfield atom. Here, we introduce a method to quantify the relative contribution of these two processes. Applying this method to experimentally measured electron momenta distributions following strong field ionization of N₂ with infrared laser light, we find approximately a 2∶1 ratio of electrons ionized from a downfield atom, relative to upfield. This suggests that the bound state wave function largely adapts adiabatically to the changing laser field, although the nonadiabatic process of ionization enhancement still contributes even in neutral molecules. Our method can be applied to any diatomic neutral molecule to better understand the evolution of the initially bound electron wave packet and hence the nature of the molecular ionization process. |
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| Publication date | 2021-11-16 |
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| Publisher | American Physical Society |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a68000ca-f42d-42b7-9388-d2efc82f18ff |
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| Record created | 2022-02-18 |
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| Record modified | 2022-02-22 |
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