A golden nanowire with square cross section is used to enhance the second-order nonlinearity of the embedding nonlinear dielectric. Simulation results using the finite element based software reveal that the plasmonic resonance of the considered structure occurs in the wavelength 1.5 μm. Second-order localization factor is obtained for the considered structure. To obtain the amplitude of the transmitted and reflected second-harmonic fields, finite element time domain simulation is used. Drude model in time domain is applied in these simulations. The effective electric susceptibility is retrieved using nonlinear retrieval method.

Keywords: Plasmonic resonance, electric field localization, effective susceptibility, enhanced nonlinearity

Full-Text [PDF 444 kb]   (1045 Downloads)