High-order harmonic generation in vibrating two-electron molecules

verfasst von

Ciprian C. Chirilǎ, Manfred Lein

Abstract

By solving the time-dependent Schrödinger equation numerically, we simulate high-order harmonic generation from one-dimensional hydrogen molecules driven by intense laser pulses of different wavelengths. The electron-electron interaction and the vibrational degree of freedom are treated fully quantum mechanically. We show that the ratio of harmonic signals from D₂ and H₂ can be understood as a consequence of two-center interference in the presence of nuclear motion. For 800 nm laser wavelength, high-order harmonic generation is essentially a one-electron process. For 1500 nm the interaction of both electrons with the laser field should be taken into account in the numerical calculation. Nevertheless, a simple model based on the shortest possible trajectories of a single active electron in the laser field predicts the ratio D₂/H₂ reasonably well.

Organisationseinheit(en)

Institut für Theoretische Physik
Quest: Centre for Quantum Engineering and Space-Time Research

Externe Organisation(en)

Universität Kassel

Typ

Artikel

Journal

Chemical Physics

Band

366

Seiten

54-57

Anzahl der Seiten

4

ISSN

0301-0104

Publikationsdatum

06.09.2009

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie, Physikalische und Theoretische Chemie

Elektronische Version(en)

https://doi.org/10.1016/j.chemphys.2009.09.004 (Zugang: Geschlossen)