Journal ArticleDOI
Interference effects in high-order harmonic generation with molecules
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In this article, high-order harmonic generation for molecules in linearly polarized laser pulses by numerical solution of the Schr\"odinger equation was studied and maxima and minima due to intramolecular interference were found in the dependence of the harmonic intensities on the internuclear distance and on the orientation of the molecules.Abstract:
We study high-order harmonic generation for ${\mathrm{H}}_{2}^{+}$ and ${\mathrm{H}}_{2}$ model molecules in linearly polarized laser pulses by numerical solution of the Schr\"odinger equation. Maxima and minima due to intramolecular interference are found in the dependence of the harmonic intensities on the internuclear distance and on the orientation of the molecules. These extrema can be approximately predicted by regarding them as the result of interference between two radiating point sources located at the positions of the nuclei.read more
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Journal ArticleDOI
Dynamical distortions of structural signatures in molecular high-order harmonic spectroscopy
Marie Labeye,François Risoud,Camille Lévêque,Camille Lévêque,J. Caillat,Alfred Maquet,Tahir Shaaran,Pascal Salières,Richard Taïeb +8 more
TL;DR: In this article, the signature of two-center interferences in molecular high-order harmonic spectra, with an emphasis on the spectral phase, was studied with the help of both ab initio computations based on the time-dependent Schrodinger equation and the molecular strong field approximation (SFA) as developed by Chiril et al.
Journal ArticleDOI
Classical effect for enhanced high harmonic yield in ultrashort laser pulses with a moderate laser intensity
TL;DR: In this paper, the influence of pulse duration on high harmonic generation (HHG) by exploring a wide laser-parameter region theoretically was investigated, and it was shown that the HHG inversion efficiency is higher for shorter pulses since the ground-state depletion is weaker in short pulses.
Journal ArticleDOI
Role of ionization in orientation dependence of molecular high-order harmonic generation.
Yuhan Chen,Bambi Hu +1 more
TL;DR: These simulations reveal the important modulation of the ionization to the HHG orientation dependence, especially at larger orientation angles, and show that this modulation can be read from the harmonic order where theHHG spectra at different orientation angles intersect.
Book ChapterDOI
Molecular attochemistry: Correlated electron dynamics driven by light
Peter Saalfrank,Florian Bedurke,Chiara Heide,Tillmann Klamroth,Stefan Klinkusch,Pascal Krause,Mathias Nest,Jean Christophe Tremblay +7 more
TL;DR: In this paper, theoretical aspects of ultrafast electron dynamics in molecules, mostly driven by lasers, are described with the help of wavefunction-based ab initio methods such as timedependent configuration interaction (TD-CI) or the multiconfigurational time-dependent Hartree-Fock (MCTDHF) methods.
Journal ArticleDOI
High-order harmonic generation in laser-irradiated homonuclear diatomics: The velocity gauge version of the molecular strong-field approximation
TL;DR: In this article, the strong-field process of high-order harmonic generation in laser-irradiated light homonuclear diatomics (H 2 + 2 + 3, N2, and O2) is compared to atomic counterparts (of nearly identical ionization potential) within the velocity gauge version of conventional strong field approximation.