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arXiv · 2301.09980

Electromagnetic lensing using the Aharonov-Bohm effect

Makoto Tokoro Schreiber·Cathal Cassidy·Menour Saidani·Matthias Wolf
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Abstract

We demonstrate theoretically and experimentally a new electromagnetic lensing concept using the magnetic vector potential - in a region free of classical electromagnetic fields - via the Aharonov-Bohm effect. This toroid-shaped lens with poloidal current flow allows for electromagnetic lensing which can be tuned to be convex or concave with a spherical aberration coefficient of opposite polarity to its focal length. This new lens combines the advantages of traditional electromagnetic and electrostatic field-based lenses and opens up new possibilities for the optical design of charged-particle systems. More generally, these results demonstrate that the Aharonov-Bohm effect can shape charged particle wavefronts beyond simple step shifts if topologies beyond simple flux lines are considered and supports the physical significance of the magnetic vector potential.

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Makoto Tokoro Schreiber, Cathal Cassidy, Menour Saidani, Matthias Wolf. 2023-01-20. Electromagnetic lensing using the Aharonov-Bohm effect. https://doi.org/10.1088/1367-2630/ad3b31

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