ArticleProceedings of the National Academy of Sciences of the United States of America2023
Interfacial Cherenkov radiation from ultralow-energy electrons.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Cathodoluminescence Enhancement Mechanisms in Silica Microspheres.Nanophotonics (Berlin, Germany) · 2026Article
- Synthetic gain for electron-beam spectroscopy.Nature communications · 2026Article
- Enhanced tunable X-rays from bulk crystals driven by table-top free electron energies.Nature communications · 2025Article
- A gain route to reversed Cherenkov radiation.Science advances · 2025Article
- Free-electron resonance transition radiation via Brewster randomness.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Performance studies of an ultrafast gamma Cherenkov imaging Screen based on Silica fibers array.Heliyon · 2024Article
- The Current Status and Future Directions on Nanoparticles for Tumor Molecular Imaging.International journal of nanomedicine · 2024Review
- Numerical investigation of sequential phase-locked optical gating of free electrons.Scientific reports · 2023Article
- Interfacial Cherenkov radiation from ultralow-energy electrons.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
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Authors and funding
12 authors.
Funding
Abstract
Cherenkov radiation occurs only when a charged particle moves with a velocity exceeding the phase velocity of light in that matter. This radiation mechanism creates directional light emission at a wide range of frequencies and could facilitate the development of on-chip light sources except for the hard-to-satisfy requirement for high-energy particles. Creating Cherenkov radiation from low-energy electrons that has no momentum mismatch with light in free space is still a long-standing challenge. Here, we report a mechanism to overcome this challenge by exploiting a combined effect of interfacial Cherenkov radiation and umklapp scattering, namely the constructive interference of light emission from sequential particle-interface interactions with specially designed (umklapp) momentum-shifts. We find that this combined effect is able to create the interfacial Cherenkov radiation from ultralow-energy electrons, with kinetic energies down to the electron-volt scale. Due to the umklapp scattering for the excited high-momentum Bloch modes, the resulting interfacial Cherenkov radiation is uniquely featured with spatially separated apexes for its wave cone and group cone.
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