Modulating Surface Impdances of Surface Plasmon Polaritons for Leaky Wave Plasmonic Nanoantennas

Plasmonic nanoantennas offer unusual optical properties and constitute a fundamental building block for plasmonic devices. In this paper, we propose to modulate the surface impedances of surface plasmon polaritons for directional leaky wave emission from hybrid plasmonic waveguides. Simulation results indicate that the proposed nanoantenna presents a wide-angle beam scanning of over 90° with a peak directivity of 19 dBi.