Design for light-based spherical aberration correction of ultrafast electron microscopes
- URL: http://arxiv.org/abs/2501.05157v1
- Date: Thu, 09 Jan 2025 11:27:21 GMT
- Title: Design for light-based spherical aberration correction of ultrafast electron microscopes
- Authors: Marius Constantin Chirita Mihaila, Martin Kozák,
- Abstract summary: We show that ponderomotive interactions near the electron cross-over can be used for aberration correction in ultrafast electron microscopes.<n>Our simulations of electron-light interactions indicate that spherical aberrations can be compensated resulting in an aberration free angle of SI8.1$.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We theoretically demonstrate that ponderomotive interactions near the electron cross-over can be used for aberration correction in ultrafast electron microscopes. Highly magnified electron shadow images from Si$_3$N$_4$ 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 \SI{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.
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