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Related Experiment Video

Updated: May 18, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact
06:53

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

Novel vortex generator and mode converter for electron beams.

P Schattschneider1, M Stöger-Pollach, J Verbeeck

  • 1Institut für Festkörperphysik, Technische Universität Wien, A-1040 Wien, Austria. schattschneider@ifp.tuwien.ac.at

Physical Review Letters
|September 26, 2012
PubMed
Summary

A novel mode converter transforms electron vortex beams into Hermite-Gaussian modes. This device acts as a filter and, with a phase plate, generates high-brilliance electron vortex beams.

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Last Updated: May 18, 2026

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Area of Science:

  • Physics
  • Quantum Optics
  • Beam Manipulation

Background:

  • Electron vortex beams carry orbital angular momentum, enabling advanced applications.
  • Controlling and transforming these beams is crucial for their utilization.

Purpose of the Study:

  • To develop and validate a mode converter for electron vortex beams.
  • To demonstrate the converter's capability to transform specific vortex modes into Hermite-Gaussian modes.
  • To explore its use as a filter and a generator for electron vortex beams.

Main Methods:

  • Numerical simulations were performed to design and predict the converter's performance.
  • Experimental verification confirmed the simulation results.
  • The converter's integration with a phase plate was investigated for beam generation.

Main Results:

  • The mode converter successfully transformed electron vortex beams with topological charge m=±1 into Hermite-Gaussian HG(10) and HG(01) modes.
  • The device functioned effectively as a mode discriminator and filter.
  • Combining the converter with a phase plate generated high-brilliance electron vortex beams from a plane wave.

Conclusions:

  • The developed mode converter is a versatile tool for manipulating electron vortex beams.
  • It offers a practical method for filtering and generating specific electron vortex modes.
  • This technology has potential applications in high-brilliance electron beam generation.