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  Distinguishing two mechanisms for enhanced ionization of H2+ using orthogonal two-color laser fields

Liu, K., & Barth, I. (2021). Distinguishing two mechanisms for enhanced ionization of H2+ using orthogonal two-color laser fields. Physical Review A, 103(1): 013103. doi:10.1103/PhysRevA.103.013103.

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PhysRevA.103.013103.pdf (Publisher version), 2MB
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https://doi.org/10.1103/PhysRevA.103.013103 (Publisher version)
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 Creators:
Liu, Kunlong1, Author
Barth, Ingo1, Author              
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1Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle, DE, ou_2415691              

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 Abstract: We theoretically study the ionization enhancement of the diatomic molecular ion H2+ at two critical internuclear distances R, using orthogonal two-color laser fields. The polarization of the fundamental infrared laser field and a weak second-harmonic field is parallel and perpendicular to the molecular axis, respectively. It is observed that adding the second-harmonic field raises slightly the first ionization peak at the smaller critical R, whereas it enhances the second one at the larger critical R significantly. We further analyze the observable evidence which distinguishes two underlying mechanisms responsible for the enhanced ionization of H2+: (i) the resonant excitation along with the coherent interference of the ionizing wave packets from the 1sσg and 2pσu states and (ii) the easier ionization from the up-field site of the molecule.

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 Dates: 2021-01-11
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: BibTex Citekey: P14022
DOI: 10.1103/PhysRevA.103.013103
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Title: Physical Review A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 103 (1) Sequence Number: 013103 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012_2