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

2016/12/06 by Mauricio Garcia-Vergara, Guillaume Demésy, Frédéric Zolla · 1 citation
Physics and Astronomy · #physics.optics

paper · pdf · doi:10.1364/ol.42.001145

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

arxiv created 2016/12/06 · arxiv updated 2017/04/05

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.

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