Design and Simulation of Broadband Horn Nanoantennas for Nanophotonic Applications

Abstract Optical plasmonic nanoantennas have proven useful in nanoplasmonic applications, paving the way for more efficient wireless optical communications. In this work, we propose a parametric study of a plasmonic horn nanoantenna in flat H sectorial format and beveled horn, both designed to radiate in the three wavelengths of optical communications: [850 nm (352.9 THz), 1310 nm (229 THz) and 1550 nm (193.5 THz)]. The modeling of the chosen nanoantennas was performed in COMSOL Multiphysics version 6.0. The simulation results prove that the geometries presented satisfactory results of reflection coefficient and gain. In addition, to complement the parametric study, the conductive metal (in gold, silver and aluminum) was varied for each nanoantenna. Through the study, it was noticed that the nanostructures simulated in silver and aluminum are potential for applications in optical nanolinks and energy harvesting.