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Maxwell's equations with hypersingularities at a conical plasmonic tip

Anne-Sophie Bonnet-Ben Dhia 1 Lucas Chesnel 2, 3 Mahran Rihani 2, 1
1 POEMS - Propagation des Ondes : Etude Mathématique et Simulation
Inria Saclay - Ile de France, CNRS - Centre National de la Recherche Scientifique, UMA - Unité de Mathématiques Appliquées
2 DeFI - Shape reconstruction and identification
Inria Saclay - Ile de France, CMAP - Centre de Mathématiques Appliquées - Ecole Polytechnique
Abstract : In this work, we are interested in the analysis of time-harmonic Maxwell's equations in presence of a conical tip of a material with negative dielectric constants. When these constants belong to some critical range, the electromagnetic field exhibits strongly oscillating singularities at the tip which have infinite energy. Consequently Maxwell's equations are not well-posed in the classical $L^2$ framework. The goal of the present work is to provide an appropriate functional setting for 3D Maxwell's equations when the dielectric permittivity (but not the magnetic per-meability) takes critical values. Following what has been done for the 2D scalar case, the idea is to work in weighted Sobolev spaces, adding to the space the so-called outgoing propagating singularities. The analysis requires new results of scalar and vector potential representations of singular fields. The outgoing behaviour is selected via the limiting absorption principle.
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https://hal.archives-ouvertes.fr/hal-02969739
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Submitted on : Friday, October 16, 2020 - 6:11:08 PM
Last modification on : Friday, October 30, 2020 - 9:35:46 AM

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Anne-Sophie Bonnet-Ben Dhia, Lucas Chesnel, Mahran Rihani. Maxwell's equations with hypersingularities at a conical plasmonic tip. 2020. ⟨hal-02969739⟩

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