Theoretical analysis of high-harmonic generation in solids

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.113.073901
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TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume113
Issue7
Article number73901
SubjectAtomic physics; Physics; Bulk crystals; Dominant mechanism; Exposed to; High harmonic generation; Midinfrared lasers; Photon energy; Saddle point; Wavelength dependence; Harmonic generation
AbstractWe investigate theoretically high-harmonic generation (HHG) in bulk crystals exposed to intense midinfrared lasers with photon energies smaller than the band gap. The two main mechanisms, interband and intraband HHG, are explored. Our analysis indicates that the interband current neglected so far is the dominant mechanism for HHG. Saddle point analysis in the Keldysh limit yields an intuitive picture of interband HHG in solids similar to atomic HHG. Interband and intraband HHG exhibit a fundamentally different wavelength dependence. This signature can be used to experimentally distinguish between the two mechanisms in order to verify their importance. © 2014 American Physical Society.
Publication date
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21276204
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Record identifierb9d4e5b3-086e-4c46-829a-3f9e3f8900c4
Record created2015-09-28
Record modified2016-05-09
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