Characterization of the essential spectrum of the Neumann–Poincaré operator in 2D domains with corner via Weyl sequences
-
Eric Bonnetier [1] ; Hai Zhang [2]
-
[1] Grenoble Alpes University
Grenoble Alpes University
Arrondissement de Grenoble, Francia
-
[2] Hong Kong University of Science and Technology
Hong Kong University of Science and Technology
RAE de Hong Kong (China)
-
- Localización: Revista matemática iberoamericana, ISSN 0213-2230, Vol. 35, Nº 3, 2019, págs. 925-948
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
-
Resumen
The Neumann–Poincaré (NP) operator naturally appears in the context of metamaterials as it may be used to represent the solutions of elliptic transmission problems via potentiel theory. In particular, its spectral properties are closely related to the well-posedness of these PDE’s, in the typical case where one considers a bounded inclusion of homogeneous plasmonic metamaterial embedded in a homogeneous background dielectric medium. In a recent work, M. Perfekt and M. Putinar have shown that the NP operator of a 2D curvilinear polygon has an essential spectrum, which depends only on the angles of the corners. Their proof is based on quasi-conformal mappings and techniques from complex-analysis. In this work, we characterise the spectrum of the NP operator for a 2D domain with corners in terms of elliptic corner singularity functions, which gives insight on the behaviour of generalized eigenmodes.
