Electromagnetic lensing using the Aharonov-Bohm effect
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.
Cite
@article{arxiv.2301.09980,
title = {Electromagnetic lensing using the Aharonov-Bohm effect},
author = {Makoto Tokoro Schreiber and Cathal Cassidy and Menour Saidani and Matthias Wolf},
journal= {arXiv preprint arXiv:2301.09980},
year = {2024}
}
Comments
15 pages main text (3 figures) + 16 pages supplemental (5 figures). V2: Revised flow and clarity of text