Determining the electronic states that contribute most to solid-state high-order harmonic radiation
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PhysRevA.109.023503.pdf
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Author
Kolesik, M.Affiliation
James Wyant College of Optical Sciences, University of ArizonaIssue Date
2024-02-01
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American Physical SocietyCitation
Kolesik, M. (2024). Determining the electronic states that contribute most to solid-state high-order harmonic radiation. Physical Review A, 109(2), 023503.Journal
Physical Review ARights
© 2024 American Physical Society.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Utilizing realistic simulations of high-order harmonic generation (HHG) in several materials, we study how different regions of the Brillouin zone contribute to the nonlinear response. It is often assumed that the electronic trajectories that start in the vicinity of the Γ point are predominantly responsible for the HHG spectrum, but it is shown here that such an approximation is generally inaccurate. While examples can be identified where merely 0.4% of the Brillouin zone produces semiquantitatively accurate HHG spectra, in most situations one must include at least 30%-50% of the Brillouin-zone volume to obtain accurate above-the-gap harmonics. For the harmonic peaks below the band-gap energy, the current-density responses from the entire Brillouin zone must always be integrated. We also identify the minimal set of electronic bands necessary for the construction of reduced but still realistic HHG models. The results should be useful for a number of HHG applications, including all-optical reconstructions of the band structure and light-matter couplings or considerations involving semiclassical approaches to solid-state high-order harmonic radiation. © 2024 American Physical Society.Note
Immediate accessISSN
2469-9926Version
Final Published Versionae974a485f413a2113503eed53cd6c53
10.1103/PhysRevA.109.023503