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Resonant state expansion applied to two-dimensional open optical systems

Doost, Mark ORCID:, Langbein, Wolfgang Werner ORCID: and Muljarov, Egor A. ORCID: 2013. Resonant state expansion applied to two-dimensional open optical systems. Physical Review A 87 (4) , 043827. 10.1103/PhysRevA.87.043827

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The resonant state expansion (RSE), a rigorous perturbative method in electrodynamics, is applied to two-dimensional open optical systems. The analytically solvable homogeneous dielectric cylinder is used as an unperturbed system, and its Green's function is shown to contain a cut in the complex frequency plane, which is included in the RSE basis. The complex eigenfrequencies of modes are calculated using the RSE for a selection of perturbations which mix unperturbed modes of different orbital momentum, such as half-cylinder, thin-film, and thin-wire perturbation, demonstrating the accuracy and convergency of the method. The resonant states for the thin-wire perturbation are shown to reproduce an approximative analytical solution.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: American Physical Society
ISSN: 1050-2947
Funders: EPSRC
Last Modified: 25 Oct 2022 08:36

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