Explanation for the smoothness of the phase in molecular high-order harmonic generation

authored by

Ciprian C. Chirilä, Manfred Lein

Abstract

We analyze the orientation dependence of harmonic amplitudes and phases from laser driven H2+. We use the Lewenstein model, with and without employing the saddle-point approximation for the summation over electron momenta. This means that the direction of the electron motion is not necessarily restricted to the laser polarization axis in contrast to previous implementations. The model predicts smooth phase jumps by almost π in the orientation dependence. This demonstrates that the smoothness can be explained without Coulomb effects, but these may be relevant for the size of the phase jumps observed in recent experiments.

Organisation(s)

Institute of Theoretical Physics
Quest: Centre for Quantum Engineering and Space-Time Research

External Organisation(s)

University of Kassel

Type

Article

Journal

Physical Review A - Atomic, Molecular, and Optical Physics

Volume

80

ISSN

1050-2947

Publication date

06.08.2009

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Electronic version(s)

https://doi.org/10.1103/PhysRevA.80.013405 (Access: Closed)