Light-based Chromatic Aberration Correction of Ultrafast Electron Microscopes

• URL: http://arxiv.org/abs/2501.10210v1
• Date: Fri, 17 Jan 2025 14:08:44 GMT
• Title: Light-based Chromatic Aberration Correction of Ultrafast Electron Microscopes
• Authors: Marius Constantin Chirita Mihaila, Neli Laštovičková Streshkova, Martin Kozák,
• Abstract summary: We propose and theoretically demonstrate a technique that allows one to compensate for chromatic aberrations in ultrafast electron microscopes. The technique is based on space-motive and time-dependent phase modulation of a pulsed electron beam using interaction with a shaped pulsed pondero lens.
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• Abstract: We propose and theoretically demonstrate a technique that allows one to compensate for chromatic aberrations of traditional electron lenses in ultrafast electron microscopes. The technique is based on space- and time-dependent phase modulation of a pulsed electron beam using interaction with a shaped pulsed ponderomotive lens. The energy-selective focal distance is reached by combining the electron temporal chirp with the time-dependent size of the effective potential, with which the electrons interact. As a result, chromatic aberration can be reduced by up to a factor of seven. This approach paves the way for advanced transverse and longitudinal wavefront shaping of electrons in free space.

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