Time-dependent density-functional study of the alignment-dependent ionization of acetylene and ethylene by strong laser pulses

Arthur Russakoff, Sergiy Bubin, Xinhua Xie, Sonia Erattupuzha, Markus Kitzler, and Kálmán Varga
Phys. Rev. A 91, 023422 – Published 19 February 2015
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Abstract

The alignment-dependent ionization of acetylene and ethylene in short laser pulses is investigated in the framework of the time-dependent density-functional theory coupled with Ehrenfest dynamics. The molecular alignment is found to have a substantial effect on the total ionization. Bond stretching is shown to cause an increase of the ionization efficiency, i.e., enhanced ionization, in qualitative agreement with previous theoretical investigations. It is also demonstrated that the enhanced ionization mechanism greatly enhances the ionization from the inner valence orbitals, and the ionization of the inner orbitals is primarily due to their extended weakly bound density tails.

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  • Received 17 November 2014

DOI:https://doi.org/10.1103/PhysRevA.91.023422

©2015 American Physical Society

Authors & Affiliations

Arthur Russakoff1, Sergiy Bubin2, Xinhua Xie3, Sonia Erattupuzha3, Markus Kitzler3, and Kálmán Varga1

  • 1Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
  • 2Department of Physics, School of Science and Technology, Nazarbayev University, Astana 010000, Kazakhstan
  • 3Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria, EU

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Vol. 91, Iss. 2 — February 2015

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