Dynamical distortions of structural signatures in molecular high-order harmonic spectroscopy

Marie Labeye, François Risoud, Camille Lévêque, Jérémie Caillat, Alfred Maquet, Tahir Shaaran, Pascal Salières, and Richard Taïeb
Phys. Rev. A 99, 013412 – Published 11 January 2019

Abstract

We study the signature of two-center interferences in molecular high-order harmonic spectra, with an emphasis on the spectral phase. With the help of both ab initio computations based on the time-dependent Schrödinger equation and the molecular strong-field approximation (SFA) as developed by Chirilă et al. [Phys. Rev. A 73, 023410 (2006)] and Faria [Phys. Rev. A 76, 043407 (2007)], we observe that the phase behavior is radically different for the short and the long trajectory contributions. By means of Taylor expansions of the molecular SFA, we link this effect to the dynamics of the electron in the continuum. More precisely, we find that the value of the electric field at recombination time plays a crucial role in the shape of the destructive interference phase jump.

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  • Received 16 November 2018

DOI:https://doi.org/10.1103/PhysRevA.99.013412

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Marie Labeye1, François Risoud1, Camille Lévêque1,2,*, Jérémie Caillat1, Alfred Maquet1, Tahir Shaaran3, Pascal Salières3, and Richard Taïeb1

  • 1Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, 75005 Paris, France
  • 2Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
  • 3LIDYL, CEA, CNRS, Université Paris-Saclay, CEA-Saclay, 91191 Gif-sur-Yvette, France

  • *Present address: Wolfgang Pauli Institute c/o Faculty of Mathematics, University of Vienna, Oskar-Morgenstern Platz 1, A-1090 Vienna, Austria and Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, A-1020 Vienna, Austria.

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Vol. 99, Iss. 1 — January 2019

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