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dc.contributor.authorPizzi, Andrea
dc.contributor.authorRosolen, Gilles
dc.contributor.authorWong, Liang Jie
dc.contributor.authorIschebeck, Rasmus
dc.contributor.authorSoljačić, Marin
dc.contributor.authorFeurer, Thomas
dc.contributor.authorKaminer, Ido
dc.date.accessioned2020-02-11T01:36:06Z
dc.date.available2020-02-11T01:36:06Z
dc.date.issued2019-10-02
dc.identifier.citationAdvanced science (Weinheim, Baden-Wurttemberg, Germany), volume 7, issue 1, page 1901609
dc.identifier.issn2198-3844
dc.identifier.otherPMC6947715
dc.identifier.other31921554
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/301957
dc.description.abstractThe interaction of electrons with strong electromagnetic fields is fundamental to the ability to design high-quality radiation sources. At the core of all such sources is a tradeoff between compactness and higher output radiation intensities. Conventional photonic devices are limited in size by their operating wavelength, which helps compactness at the cost of a small interaction area. Here, plasmonic modes supported by multilayer graphene metamaterials are shown to provide a larger interaction area with the electron beam, while also tapping into the extreme confinement of graphene plasmons to generate high-frequency photons with relatively low-energy electrons available from tabletop sources. For 5 MeV electrons, a metamaterial of 50 layers and length 50 µm, and a beam current of 1.7 µA, it is, for instance, possible to generate X-rays of intensity 1.5 × 107 photons sr-1 s-1 1%BW, 580 times more than for a single-layer design. The frequency of the driving laser dynamically tunes the photon emission spectrum. This work demonstrates a unique free-electron light source, wherein the electron mean free path in a given material is longer than the device length, relaxing the requirements of complex electron beam systems and potentially paving the way to high-yield, compact, and tunable X-ray sources.
dc.languageeng
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceessn: 2198-3844
dc.sourcenlmid: 101664569
dc.subjectPlasmons
dc.subjectGraphene
dc.subjectNanophotonics
dc.subjectMetamaterials
dc.subjectX‐ray Sources
dc.subjectFree‐electrons
dc.titleGraphene Metamaterials for Intense, Tunable, and Compact Extreme Ultraviolet and X-Ray Sources.
dc.typeArticle
dc.date.updated2020-02-11T01:36:06Z
dc.identifier.doi10.17863/CAM.49034
rioxxterms.versionofrecord10.1002/advs.201901609
rioxxterms.versionVoR
rioxxterms.licenseref.urihttps://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidPizzi, Andrea [0000-0002-6714-7360]
dc.contributor.orcidRosolen, Gilles [0000-0002-7399-3838]
dc.contributor.orcidIschebeck, Rasmus [0000-0002-5612-5828]
pubs.funder-project-idSwiss National Science Foundation (200020)


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International