AffiliationUniv Arizona, James C Wyant Coll Opt Sci
MetadataShow full item record
PublisherWALTER DE GRUYTER GMBH
CitationHu, H., Gao, D., Lin, X., Hou, S., Zhang, B., Wang, Q. J., & Luo, Y. (2020). Directing Cherenkov photons with spatial nonlocality. Nanophotonics, 9(10), 3435-3442.
Rights© 2020 Hao Hu et al., published by De Gruyter. This work is licensed under the Creative Commons Attribution 4.0 International License.
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AbstractCherenkov radiation in natural transparent materials is generally forward-propagating, owing to the positive group index of radiation modes. While negative-index metamaterials enable reversed Cherenkov radiation, the forward photon emission from a swift charged particle is prohibited. In this work, we theoretically investigate emission behaviours of a swift charged particle in the nanometallic layered structure. Our results show that Cherenkov photons are significantly enhanced by longitudinal plasmon modes resulting from the spatial nonlocality in metamaterials. More importantly, longitudinal Cherenkov photons can be directed either forward or backward, stringently depending on the particle velocity. The enhanced flexibility to route Cherenkov photons holds promise for many practical applications of Cherenkov radiation, such as novel free-electron radiation sources and new types of Cherenkov detectors.
NoteOpen access article
VersionFinal published version
Except where otherwise noted, this item's license is described as © 2020 Hao Hu et al., published by De Gruyter. This work is licensed under the Creative Commons Attribution 4.0 International License.