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Reconstructing the Material Properties of a Scalar Metasurface - A Stochastic Optimization Approach

The problem of material characterization of a scalar metasurface is solved in the paper. The proposed method benefits from the combination of a stochastic optimization method and a fast analytical time-domain approach to compute electromagnetic fields in the vicinity of the thin sheet. The convergence of five state-of-the-art evolutionary optimization algorithms on the material characterization problem is compared here. The influence of problem parameters on the convergence of the characterization method is discussed.