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Brillouin-Wigner perturbation theory in open electromagnetic systems

Muljarov, Egor A. ORCID:, Langbein, Wolfgang Werner ORCID: and Zimmermann, R. 2010. Brillouin-Wigner perturbation theory in open electromagnetic systems. Europhysics Letters 92 (5) , 50010. 10.1209/0295-5075/92/50010

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A Brillouin-Wigner perturbation theory is developed for open electromagnetic systems which are characterised by discrete resonant states with complex eigenenergies. Since these states are exponentially growing at large distances, a modified normalisation is introduced that allows a simple spectral representation of the Green's function. The perturbed modes are found by solving a linear eigenvalue problem in matrix form. The method is illustrated on exactly solvable one- and three-dimensional examples being, respectively, a dielectric slab and a microsphere.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: EDP Sciences
ISSN: 0295-5075
Last Modified: 17 Oct 2022 10:12

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