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Free-electron resonance transition radiation via Brewster randomness
Zheng Gong1,2, Ruoxi Chen1,2, Zun Wang3
1Interdisciplinary Center for Quantum Information, State Key Laboratory of Extreme Photonics and Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
Summary
We discovered free-electron resonance transition radiation that is invariant to structural randomness. This novel radiation is enhanced at the Brewster angle, paving the way for advanced photonic applications.
Area of Science:
- Physics
- Optics
- Materials Science
Background:
- Free-electron radiation, including Cherenkov and transition radiation, is crucial for various applications but often stochastic.
- Existing methods struggle with controlling radiation features in random media.
Purpose of the Study:
- To reveal a novel type of free-electron radiation with invariant intensity and directionality.
- To explore the underlying physics of this phenomenon and its potential applications.
Main Methods:
- Investigating electron interactions with layered aperiodic nanostructures.
- Engineering phase coherence for constructive interference at the Brewster angle.
- Analyzing the impact of structural randomness on radiation properties.
Main Results:
- Demonstrated free-electron resonance transition radiation invariant to long-range structural randomness.
- Showcased radiation enhancement by orders of magnitude at the resonant Brewster angle.
- Identified constructive interference at the Brewster angle as the key mechanism.
Conclusions:
- The discovered resonance transition radiation offers a new paradigm for controlling free-electron light sources.
- This finding enables robust photonic devices and light sources, even in the presence of structural disorder.
- Potential applications include novel light sources, optical frequency combs, and advanced particle detectors.
Keywords:
Brewster effectfree-electron radiationrandom laserrandom mediaresonance transition radiationMore Related Videos
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