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Right: Bandgap diagram for a one-dimensional structure consisting of metal films separated by vacuum. Black areas correspond to gaps, while white areas indicate bands. The inset shows a schematic of the chirped structure where shaded regions correspond to metallic layers with fixed thickness. Left: Spectra of eigenmodes for the chirped structure corresponding to the plasmonic Bloch oscillations (upper part of the spectra), and to the beam curling (lower part).
Evolution of the magnetic field amplitude demonstrating plasmonic Bloch oscillations in the structure with 40 unit cells. Oscillations period is .
Trajectories of paraxial beams in the transmission band for different values of the propagation constants: (a) , (b) , and (c) .
Evolution of the magnetic field demonstrating the beam curling for a Gaussian beam launched at right band boundary (shown by an arrow) with its spectrum centered at .
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