Coupled Plasmonic Metallic Nanowires to Induce Localization of Surface Plasmon Polaritons
DOI:
https://doi.org/10.48165/Keywords:
Structural Disorder, Spatial Distribution, Plasmonic Arrays, Coupled, Metallic Nanowires, Polaritions, LocalizationAbstract
We have studied the influence of the structural disorder on the spatial distribution of the plasmonic field and its propagation in one and two dimensional arrays of coupled metallic nanowires. By solving the three dimensional Maxwell equations we have studied the Anderson localization of surface Plasmon polaritions for arrays of metallic nanowires with varying degree of the structural disorder. We have found that a random distribution of radii of the nanowires leaded to transverse spatial localization of collective surface plasmonic polarition excitations. The characteristic spatial confinement of the plasmonic field found smaller than the optical wavelength which demonstrated that plasmonic structures can be employed to implement the subwave length Anderson localization of the electromagnetic field. We have also found that influence of the metallic loss and the gain of the host medium on the plasmonic Anderson localization modes, loss was compensated by the gain whose strength was much smaller than the loss rate of the metallic component of the plasmonic array. The obtained results were found in good agreement with previously obtained results.
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