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Resonant-state expansion applied to planar waveguides

Armitage, L. J., Doost, Mark, Langbein, Wolfgang Werner and Muljarov, Egor A. 2014. Resonant-state expansion applied to planar waveguides. Physical Review A 89 (5) , 053832. 10.1103/PhysRevA.89.053832

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Abstract

The resonant-state expansion, a recently developed method in electrodynamics, is generalized here to planar open optical systems with non-normal incidence of light. The method is illustrated and verified on exactly solvable examples, such as a dielectric slab and a Bragg reflector microcavity, for which explicit analytic formulas are obtained. This comparison demonstrates the accuracy and convergence of the method. Interestingly, the spectral analysis of a dielectric slab, in terms of resonant states, reveals an influence of waveguide modes in the transmission. These modes, which on-resonance do not couple to external light, surprisingly do couple to external light for off-resonant excitation.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: American Physical Society
ISSN: 1050-2947
Funders: Engineering and Physical Sciences Research Council
Date of First Compliant Deposit: 27 April 2016
Date of Acceptance: 14 April 2014
Last Modified: 21 Feb 2019 11:49
URI: http://orca-mwe.cf.ac.uk/id/eprint/84950

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