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Simultaneous measurements of strong-field ionization and high harmonic generation in aligned molecules

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1088/1361-6455/ab7643
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0002-8167-2727; Search for: 1; Search for: 1; Search for: 1ORCID identifier: https://orcid.org/0000-0002-8877-0872; Search for: 1; Search for: 1ORCID identifier: https://orcid.org/0000-0002-2810-3648
Affiliation
  1. National Research Council Canada. Security and Disruptive Technologies
FormatText, Article
Subjectionization yield; high harmonic generation; aligned molecules
Abstract
High harmonic spectroscopy relies on high harmonic generation (HHG) in aligned molecules. The first step of HHG is the ionization of the molecule in the intense femtosecond laser field. Here we present measurements of both ionization yield and high harmonic yield as a function of molecular angle in N₂ and CO₂ molecules. Measurements were done at two wavelengths, 800 and 1200 nm, and for a range of laser intensities, to study the sensitivity of laser conditions on both processes. The behavior of N₂ was relatively insensitive to laser conditions. However in CO₂, a minimum in high harmonic emission was observed that was sensitive to both laser intensity and wavelength, and was attributed to interference in emission from the HOMO and HOMO-2 orbitals.
Publication date
PublisherIOP Publishing
In
  • Journal of Physics B: Atomic, Molecular and Optical Physics 53, no. 8, 084006 (25 March 2020): 1–8.
LanguageEnglish
Peer reviewedYes
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Record identifier8b758e2f-4e81-48ed-b4d4-90e9a7f9d15a
Record created2020-07-02
Record modified2023-08-11
Date modified: