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Dispersive 2D Cherenkov radiation on a dielectric nano-film.

Abstract：

:We report a modified two-dimensional Cherenkov radiation, which occurs on a high-index dielectric nano-film driven by uniformly moving electron-beam. It is essentially different from the ordinary Cherenkov radiation in that, in the nondispersive medium, it shows unique dispersion characteristics-the waves with higher frequencies radiate at larger Cherenkov angles. Its radiation frequency and direction are essentially determined by structure parameters as well as the beam-velocity. By means of fully electromagnetic simulations and theoretical analyses, we explored the mechanism and requirements of this radiation. This new Cherenkov radiation may lead to promising applications in a broad range of fields.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Liu W

doi

10.1038/s41598-017-06176-1

subject

Has Abstract

pub_date

2017-07-19 00:00:00

pages

5787

issue

1

issn

2045-2322

pii

10.1038/s41598-017-06176-1

journal_volume

7

pub_type

杂志文章

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