Graphene Metamaterials for Intense, Tunable, and Compact Extreme Ultraviolet and X-Ray Sources.

ABSTRACT: The 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,

SUBMITTER: Pizzi A 

PROVIDER: S-EPMC6947715 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature