GRAS, Alexandre; LALANNE, Philippe; DURUFLÉ, Marc

doi:10.1364/JOSAA.394206

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Licence d’utilisation du document

GRAS, Alexandre
Laboratoire Photonique, Numérique et Nanosciences [LP2N]
Advanced 3D Numerical Modeling in Geophysics [Magique 3D]

LALANNE, Philippe
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

DURUFLÉ, Marc
Advanced 3D Numerical Modeling in Geophysics [Magique 3D]

Langue

Article de revue

Ce document a été publié dans

Journal of the Optical Society of America. A Optics, Image Science, and Vision. 2020, vol. 37, n° 7, p. 1219

Optical Society of America

Résumé en anglais

Any optical structure possesses resonance modes, and its response to an excitation can be decomposed onto the quasinormal and numerical modes of a discretized Maxwell operator. In this paper, we consider a dielectric permittivity that is an N-pole Lorentz function of the frequency. Even for discretized operators, the literature proposes different formulas for the coefficients of the quasinormal-mode expansion, and this comes as a surprise. We propose a general formalism, based on auxiliary fields, which explains why and evidences that there is, in fact, an infinity of mathematically sound possible expansion coefficients. The nonuniqueness is due to a choice of the linearization of Maxwell’s equations with respect to frequency and of the choice of the form of the source term. Numerical results validate the different formulas and compare their accuracy.< Réduire

Mots clés en anglais

Electromagnetic resonance

Quasinormal mode

Microcavity

Nanoresonator

Modal expansion

URI

https://oskar-bordeaux.fr/handle/20.500.12278/181595

DOI

http://dx.doi.org/10.1364/JOSAA.394206

Project ANR

Théorie et modélisation numérique des résonances optiques - ANR-16-CE24-0013

Origine

Importé de hal

Unités de recherche

Laboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298