Abstract
In this paper, we focus on the problem of optimizing plasmonic structures. A plasmon- assisted waveguide coupler is considered as a test problem, which leads to a flve-dimensional optimization problem carried out by an evolution strategy (ES). The optimization results are verifled by a comparative analysis between difierent solvers, i.e., the flnite element package CONCEPTs and the multiple multipole program (MMP). We also compared with results obtained using a deterministic optimization algorithm, namely the Nedler-Mead method as implemented in the commercial software package COMSOL Multiphysics. Some issues concerning deterministic versus evolutionary optimization, in particular, in the fleld of plasmonics have been discussed.
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