Toward Photon-Induced Near-Field Electron Tomography
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911237107875840 |
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| author | Shpiro, Tamir Ruimy, Ron Yan, Qinghui Bucher, Tomer Shultzman, Avner Sheinfux, Hanan Herzig Kaminer, Ido |
| author_facet | Shpiro, Tamir Ruimy, Ron Yan, Qinghui Bucher, Tomer Shultzman, Avner Sheinfux, Hanan Herzig Kaminer, Ido |
| contents | New techniques for imaging electromagnetic near-fields in nanostructures drive advancements in nanotechnology, optoelectronics, materials science, and biochemistry. Most existing techniques probe near-fields along surfaces, lacking the ability to extract near-fields confined within the structure. Notable exceptions use free electrons to traverse through nanostructures, integrating the field along their trajectories, extracting 2D near-field projections rather than the complete field. Here, drawing inspiration from computed tomography (CT), we present a tomography concept providing full 3D reconstruction of vectorial time-harmonic near-fields. We develop a Radon-like algorithm incorporating the electron wave-nature and the time dependency of its interaction with vector fields. To show the prospects of electron near-field tomography, we propose and analyze its ability to resolve the sub-wavelength zigzag profile of highly confined hyperbolic polaritons and to reconstruct 3D phase singularities in a chiral near-field, raising exciting goals for next-generation experiments in ultrafast transmission electron microscopes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_24648 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Toward Photon-Induced Near-Field Electron Tomography Shpiro, Tamir Ruimy, Ron Yan, Qinghui Bucher, Tomer Shultzman, Avner Sheinfux, Hanan Herzig Kaminer, Ido Optics New techniques for imaging electromagnetic near-fields in nanostructures drive advancements in nanotechnology, optoelectronics, materials science, and biochemistry. Most existing techniques probe near-fields along surfaces, lacking the ability to extract near-fields confined within the structure. Notable exceptions use free electrons to traverse through nanostructures, integrating the field along their trajectories, extracting 2D near-field projections rather than the complete field. Here, drawing inspiration from computed tomography (CT), we present a tomography concept providing full 3D reconstruction of vectorial time-harmonic near-fields. We develop a Radon-like algorithm incorporating the electron wave-nature and the time dependency of its interaction with vector fields. To show the prospects of electron near-field tomography, we propose and analyze its ability to resolve the sub-wavelength zigzag profile of highly confined hyperbolic polaritons and to reconstruct 3D phase singularities in a chiral near-field, raising exciting goals for next-generation experiments in ultrafast transmission electron microscopes. |
| title | Toward Photon-Induced Near-Field Electron Tomography |
| topic | Optics |
| url | https://arxiv.org/abs/2510.24648 |