Extracting an accurate model for permittivity from experimental data : Hunting complex poles from the real line

Abstract

In this letter, we describe a very general procedure to obtain a causal fit of the permittivity of materials from experimental data with very few parameters. Unlike other closed forms proposed in the literature, the particularity of this approach lies in its independence towards the material or frequency range at stake. Many illustrative numerical examples are given and the accuracy of the fitting is compared to other expressions in the literature.

arXiv commentThe python code and datasets used to obtain the numerical results in this paper can be found at : https://git.io/v14Jb

References in corpus (1)

• Calculation and analysis of complex band structure in dispersive and dissipative two-dimensional photonic crystals

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