Design for light-based spherical aberration correction of ultrafast electron microscopes
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912182049964032 |
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| author | Mihaila, Marius Constantin Chirita Kozák, Martin |
| author_facet | Mihaila, Marius Constantin Chirita Kozák, Martin |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_05157 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Design for light-based spherical aberration correction of ultrafast electron microscopes Mihaila, Marius Constantin Chirita Kozák, Martin Optics Quantum Physics 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. |
| title | Design for light-based spherical aberration correction of ultrafast electron microscopes |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2501.05157 |