Exploiting lens aberrations to create electron-vortex beams

Laura Clark, A Béché, G Guzzinati, A Lubk, Michael Mazilu, R Van Boxem, J Verbeeck

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

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 condensor plane. Experimental results are found to be in good agreement with simulations.
Original languageEnglish
Article number 064801
Number of pages5
JournalPhysical Review Letters
Volume111
Issue number6
DOIs
Publication statusPublished - Aug 2013

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