Resonating Electrostatically Guided Electrons

An essential component for quantum-enhanced measurements with free electrons is an electron resonator. We report stable guiding of free electrons at 50 eV energy for up to seven round trips in a linear autoponderomotive guiding structure, which is realized with two microstructured printed circuit bo...

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Bibliographic Details
Published in:Physical review letters 2024-06, Vol.132 (25), p.255001, Article 255001
Main Authors: Seidling, M, Schmidt-Kaler, F D F, Zimmermann, R, Simonaitis, J W, Keathley, P D, Berggren, K K, Hommelhoff, P
Format: Article
Language:English
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Summary:An essential component for quantum-enhanced measurements with free electrons is an electron resonator. We report stable guiding of free electrons at 50 eV energy for up to seven round trips in a linear autoponderomotive guiding structure, which is realized with two microstructured printed circuit boards that generate the required electromagnetic fields. Free electrons are laser triggered from a sharp tungsten needle tip and coupled in at the front of the electron resonator with the help of sub-nanosecond-fast switchable electron mirrors. After a variable time delay, we open the rear electron mirror and measure the number of trapped electrons with a delay-line detector. We demonstrate, simulate, and show ways of optimizing an electron resonator in simulations, which will help enable "interaction-free" measurement setups, including multipass and quantum-Zeno effect based schemes, helping to realize the quantum electron microscope.
ISSN:0031-9007
1079-7114
1079-7114
DOI:10.1103/PhysRevLett.132.255001