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Cerenkov radiation in metallic metamaterials
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic model of cut-through metal slits with convection electrons.

Image of FIG. 2.
FIG. 2.

(a) Simulated radiation angles for metal slits structure and its effective dielectric media are compared at various beam energies. (b) Contour plot of the field distribution for the metamaterial at 20 keV.

Image of FIG. 3.
FIG. 3.

(a) Coupling efficiencies as a function of slit width for various bunch lengths. (b) The slit widths for maximum coupling are shown for various spatial bunch lengths assuming the aspect ratio of spatial bunch length to thickness of 200 together with those estimated by a simple model (dashed line). The inset shows the effect of the bunch’s transverse thickness on the coupling for the fixed spatial bunch length, .

Image of FIG. 4.
FIG. 4.

(a) Dispersion of the first three guided modes for metal slits having and with 30 keV beam line (dashed line) and (b) The fast Fourier transform (FFT) spectrum of field measured in the middle of the center slit. (c) FFT spectrum for as a function of slab thickness.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Cerenkov radiation in metallic metamaterials