Controlling the 2p hole alignment in neon via the 2s-3p Fano resonance

Elisabeth Heinrich-Josties, Stefan Pabst, and Robin Santra
Phys. Rev. A 89, 043415 – Published 16 April 2014

Abstract

We study the state-resolved production of neon ion after resonant photoionization of Ne via the 2s-3p Fano resonance. We find that by tuning the photon energy across the Fano resonance, a surprisingly high control over the alignment of the final 2p hole along the polarization direction can be achieved. In this way, hole alignments can be created that are otherwise very hard to achieve. The mechanism responsible for this hole alignment is the destructive interference of the direct and indirect (via the autoionizing 2s13p state) ionization pathways of 2p. By changing the photon energy, the strength of the interference varies and 2p hole alignments with ratios up to 19:1 between 2p0 and 2p±1 holes can be created—an effect normally only encountered in tunnel ionization using strong-field ir pulses. The inclusion of spin-orbit interaction does not change the qualitative feature and leads only to a reduction in the alignment by 2/3. Our study is based on a time-dependent configuration-interaction singles approach, which solves the multichannel time-dependent Schrödinger equation.

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  • Received 10 March 2014

DOI:https://doi.org/10.1103/PhysRevA.89.043415

©2014 American Physical Society

Authors & Affiliations

Elisabeth Heinrich-Josties1,2, Stefan Pabst1, and Robin Santra1,3

  • 1Center for Free-Electron Laser Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany
  • 2Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
  • 3Department of Physics, University of Hamburg, Jungiusstrasse 9, 20355 Hamburg, Germany

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Issue

Vol. 89, Iss. 4 — April 2014

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