Velocity-tunable exciton-photon hybridization in cathodoluminescence
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866911519490441216 |
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| author | Ebel, Sven Nørgaard, Martin Hansen, Christian Nicolaisen Mortensen, N. Asger Morozov, Sergii |
| author_facet | Ebel, Sven Nørgaard, Martin Hansen, Christian Nicolaisen Mortensen, N. Asger Morozov, Sergii |
| contents | Exciton-photon hybridization is typically realised in geometrically defined optical cavities, where tunability is achieved by modifying either the cavity or the excitonic medium. Here we investigate transition-radiation interferences in suspended subwavelength films resembling a free-electron-defined resonance and explore their interaction with excitons in transition metal dichalcogenides. We demonstrate that these resonances hybridize with excitonic transitions and can be tuned continuously by varying the electron energy. The resulting detuning depends on both film thickness and electron velocity, establishing the latter as an external and continuous knob for exciton-photon coupling. This approach enables tunable hybridization without structural modification and provides a free-electron-driven nanoscale platform for studying exciton-light interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_15191 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Velocity-tunable exciton-photon hybridization in cathodoluminescence Ebel, Sven Nørgaard, Martin Hansen, Christian Nicolaisen Mortensen, N. Asger Morozov, Sergii Optics Other Condensed Matter Exciton-photon hybridization is typically realised in geometrically defined optical cavities, where tunability is achieved by modifying either the cavity or the excitonic medium. Here we investigate transition-radiation interferences in suspended subwavelength films resembling a free-electron-defined resonance and explore their interaction with excitons in transition metal dichalcogenides. We demonstrate that these resonances hybridize with excitonic transitions and can be tuned continuously by varying the electron energy. The resulting detuning depends on both film thickness and electron velocity, establishing the latter as an external and continuous knob for exciton-photon coupling. This approach enables tunable hybridization without structural modification and provides a free-electron-driven nanoscale platform for studying exciton-light interactions. |
| title | Velocity-tunable exciton-photon hybridization in cathodoluminescence |
| topic | Optics Other Condensed Matter |
| url | https://arxiv.org/abs/2603.15191 |