Abstract
This paper investigates plasmonic Bloch-Zener oscillation and beam curling in metal-dielectric waveguide arrays (MDWAs) using numerical simulations and theoretical analyses. The beam generated by plasmonic Zener tunneling undergoes a plasmonic Bloch oscillation in the second band of MDWAs and becomes curled. Changing the width and the relative-permittivity gradient of the dielectric layers causes this curled beam to move backward, forward, or even unmoved. Increasing the width and the relative-permittivity gradient of the dielectric layers increases the rightward displacement and reduces the leftward displacement. The direction of motion of the curled beam is determined by the net longitudinal displacement.
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