title: Theoretical analysis of high-harmonic generation in solids.
abstract: We 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.
authors.affiliation: Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: G
authors.initials: G
authors.lastname: Vampa
authors.affiliation: Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: C R
authors.initials: CR
authors.lastname: McDonald
authors.affiliation: Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: G
authors.initials: G
authors.lastname: Orlando
authors.affiliation: National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada.
authors.forename: D D
authors.initials: DD
authors.lastname: Klug
authors.affiliation: Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: P B
authors.initials: PB
authors.lastname: Corkum
authors.affiliation: Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: T
authors.initials: T
authors.lastname: Brabec