Excitation analysis of an optical nanocircuit fed by a Gaussian beam

In this paper, we analyze the electromagnetic coupling of an optical nanocircuit fed by Gaussian beam. The circuit is composed by a receiving and an emitting dipole connected by a two-wire optical transmission line. The receiving dipole is illuminated by a focused Gaussian beam with λ=830nm and beam waist of 340nm. The numerical analysis of this circuit is performed by method of moments. The results of calculations are current distribution, the voltage reflection coefficient and near field diagrams for circuits with different geometrical parameters. We discuss the conditions which allow one to obtain an efficient coupling between the receiving dipole and the Gaussian beam.