Work

Design for light-based spherical aberration correction of ultrafast electron microscopes

Year: 2024

Type: article

Abstract: We theoretically demonstrate that ponderomotive interactions near the electron cross-over can be used for aberration correction in ultrafast electron microscopes. Highly magnified electron shadow images from Si3N4 thin films are utilized to visualize the distortions induced by spherical aberrations. Our simulations of electron-light interactions indicate that spherical aberrations can be compensated resulting in an aberration-free angle of 8.1 mrad. For achieving the necessary light distribution, we use a gradient descent algorithm to optimize Zernike polynomials and shape the light beam into a modified Gaussian and Laguerre-Gaussian beam.

Source: Optics Express

DOI: 10.1364/oe.542930

Authors: Marius Constantin Chirita Mihaila, Martin Kozák

Institution: Charles University

Language: English

Topic: Advanced Electron Microscopy Techniques and Applications

Subfield: Structural Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Univerzita Karlova v Praze, European Commission, Grantová Agentura České Republiky, European Research Council