Observation of the reversed Cherenkov radiation
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Observation of the reversed.pdf
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Author(s)
Duan, Zhaoyun
Tang, Xianfeng
Wang, Zhanliang
Zhang, Yabin
Chen, Xiaodong
Gong, Yubin
Chen, Min
Date Issued
March 2017
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Duan, Zhaoyun; Tang, Xianfeng; Wang, Zhanliang; Zhang, Yabin; Chen, Xiaodong; Chen, Min and Gong, Yubin. “Observation of the Reversed Cherenkov Radiation.” Nature Communications 8 (March 2017): 14901 © 2017 The Author(s)
Version
Final published version
Abstract
Reversed Cherenkov radiation is the exotic electromagnetic radiation that is emitted in the opposite direction of moving charged particles in a left-handed material. Reversed Cherenkov radiation has not previously been observed, mainly due to the absence of both suitable all-metal left-handed materials for beam transport and suitable couplers for extracting the reversed Cherenkov radiation signal. In this paper, we develop an all-metal metamaterial, consisting of a square waveguide loaded with complementary electric split ring resonators. We demonstrate that this metamaterial exhibits a left-handed behaviour, and we directly observe the Cherenkov radiation emitted predominantly near the opposite direction to the movement of a single sheet electron beam bunch in the experiment. These observations confirm the reversed behaviour of Cherenkov radiation. The reversed Cherenkov radiation has many possible applications, such as novel vacuum electronic devices, particle detectors, accelerators and new types of plasmonic couplers.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1038/ncomms14901
