arXiv subjects

Mauricio Garcia-Vergara

Publications and source records attributed to Mauricio Garcia-Vergara.

2 recordsLinked to original sources

arXiv2023

Electrodynamics of an oscillating particle without cheating PART I : In vacuo. PART II : Near a dispersive bulk

In this paper, the electromagnetic radiation from an oscillating particle placed in the vicinity of an object of size comparable to the wavelength is studied. Although this problem may seem academic at first sight, the details of the calculations are presented throughout without any detail left under the carpet. A polyharmonic decomposition of the radiation sources allows the diffraction problem to be fully characterised while satisfying energy conservation. Finally, the source expressions obtained are suitable for use in a numerical code. A 3D illustration using finite elements is provided.

physics.optics↗

arXiv2016

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

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.

physics.optics↗