Accuracy analysis of applying global surface impedance boundary condition to MPIE formulation for modeling plasmonic structures

Abstract

The global surface impedance boundary condition (GSIBC), which is an exact relation between tangential electric and magnetic fields on the boundary, is used in the approximate formulation of mixed potential integral equation (MPIE) for analyzing some plasmonic structures. A criterion is defined based on the eigenvalues of GSIBC matrix and it is shown that for the conventional plasmonic circuits this approximation is acceptable. The examples illustrate the accuracy and numerical efficiency of this formulation.