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General theory of wave propagation through graded interfaces between positive- and negative-refractive-index media
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
2017 (English)In: Physical Review A: covering atomic, molecular, and optical physics and quantum information, ISSN 2469-9926, E-ISSN 2469-9934, Vol. 96, no 4, article id 043848Article in journal (Refereed) Published
Abstract [en]

The introduction of metamaterials and transformation optics has brought the possibilities for manipulating electromagnetic waves to an unprecedented level, suggesting applications like super-resolution imaging, cloaking, subwavelength focusing, and field localization. The refractive index of metamaterial structures in transformation optics typically has to be spatially graded. This paper presents a full analytical method for description of the field propagation through composites with gradient refractive index. The remarkable property of this approach is that it gives explicit general expressions for the field intensity and transmission and reflection coefficients, without reference to any boundary conditions. This opens a possibility for a novel fundamental theory of a number of important electromagnetic phenomena. The method enables calculation of wave propagation parameters within structures with arbitrary losses, arbitrary spectral dispersions, and arbitrary slopes of permittivity and permeability gradients, from mild to abrupt.

Place, publisher, year, edition, pages
American Physical Society, 2017. Vol. 96, no 4, article id 043848
National Category
Physical Sciences
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-68790DOI: 10.1103/PhysRevA.96.043848ISI: 000413372100005OAI: oai:DiVA.org:lnu-68790DiVA: diva2:1157775
Available from: 2017-11-16 Created: 2017-11-16 Last updated: 2017-11-29Bibliographically approved

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Dalarsson, Mariana

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