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Exploiting Lens Aberrations to Create Electron-Vortex Beams

L. Clark, A. Béché, G. Guzzinati, A. Lubk, M. Mazilu, R. Van Boxem, and J. Verbeeck
Phys. Rev. Lett. 111, 064801 – Published 8 August 2013
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Abstract

A model for a new electron-vortex beam production method is proposed and experimentally demonstrated. The technique calls on the controlled manipulation of the degrees of freedom of the lens aberrations to achieve a helical phase front. These degrees of freedom are accessible by using the corrector lenses of a transmission electron microscope. The vortex beam is produced through a particular alignment of these lenses into a specifically designed astigmatic state and applying an annular aperture in the condenser plane. Experimental results are found to be in good agreement with simulations.

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  • Received 24 May 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.064801

© 2013 American Physical Society

Synopsis

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Into the Vortex

Published 8 August 2013

With a few simple adjustments, an electron beam can be turned into a spiraling vortex beam.

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Authors & Affiliations

L. Clark1,*, A. Béché1, G. Guzzinati1, A. Lubk2, M. Mazilu3, R. Van Boxem1, and J. Verbeeck1

  • 1EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
  • 2Triebenberglabor, University of Dresden, Zum Triebenberg 1, 01062 Dresden, Germany
  • 3SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom

  • *laura.clark@ua.ac.be

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Issue

Vol. 111, Iss. 6 — 9 August 2013

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