Plasmonic equi-triangular slot loaded bowtie nano-antenna for quantum optical wireless communication

Abstract

In this manuscript, the plasmonic equi-triangular slot loaded bowtie aluminium dipole nano-antenna is investigated on a glass substrate for quantum optical wireless communication The optical characteristics of aluminium, such as permittivity and refractive index, are analyzed using the Drude dispersive model, which exhibits the required criteria for plasmonic resonance. A nanocircuit model for bowtie nano-antennas using lumped circuit elements is proposed and validated through CST simulation. The four equi-triangular slot loaded bowtie nanostructures are designed to tune the resonating frequency from 111 THz to 292 THz. Further, detailed investigation of the equi-triangular slot loaded bowtie nano-antenna is performed through the design parameter Tc (thickness) to obtain the optimum characteristics appropriate for quantum optical wireless communication. The proposed single bowtie nano-antenna exhibits a directivity of 7.606 dBi and a field enhancement factor of 289.5 at the resonating frequency of 292 THz.