Theoretical studies of high-harmonic generation: Effects of symmetry, degeneracy and orientation

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dc.creatorMadsen, C. B.
dc.creatorMadsen, L. B.
dc.date2007-06-22
dc.date.accessioned2026-07-07T08:37:08Z
dc.date.available2026-07-07T08:37:08Z
dc.descriptionUsing a quantum mechanical three-step model we present numerical calculations on the high-harmonic generation from four polyatomic molecules. Ethylene (C$_2$H$_4$) serves as an example where orbital symmetry directly affects the harmonic yield. We treat the case of methane (CH$_4$) to address the high-harmonic generation resulting from a molecule with degenerate orbitals. To this end we illustrate how the single orbital contributions show up in the total high-harmonic signal. This example illustrates the importance of adding coherently amplitude contributions from the individual degenerate orbitals. Finally, we study the high-harmonic generation from propane (C$_3$H$_8$) and butane (C$_4$H$_{10}$). These two molecules, being extended and far from spherical in structure, produce harmonics with non-trivial orientational dependencies. In particular, propane can be oriented so that very high-frequency harmonics are favorized, and thus the molecule contains prospects for the generation of UV attosecond pulses.
dc.description9 pages, 6 figures, 1 table
dc.identifierhttps://arxiv.org/abs/0706.3306
dc.identifierhttp://arxiv.org/abs/0706.3306
dc.identifierPhys. Rev. A 76, 043419 (2007)
dc.identifierdoi:10.1103/PhysRevA.76.043419
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140298
dc.subjectAtomic Physics
dc.titleTheoretical studies of high-harmonic generation: Effects of symmetry, degeneracy and orientation
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