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TE-wave propagation in graded waveguide structures
Lund University, Sweden.
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.ORCID iD: 0000-0002-7018-6248
2020 (English)In: OSA Continuum, E-ISSN 2578-7519, Vol. 3, no 1, p. 67-76Article in journal (Refereed) Published
Abstract [en]

We investigate TE-wave propagation in a hollow waveguide with a graded dielectric layer, described using a hyperbolic tangent function. General formulae for the electric field components of the TE-waves, applicable to hollow waveguides with arbitrary cross sectional shapes, are presented. We illustrate the exact analytical results for the electric field components in the special case of a rectangular waveguide. Furthermore, we derive exact analytical results for the reflection and transmission coefficients valid for waveguides of arbitrary cross sectional shapes. Finally, we show that the obtained reflection and transmission coefficients are in exact asymptotic agreement with those obtained for a very thin homogeneous dielectric layer using mode-matching and cascading. The proposed method gives analytical results that are directly applicable without the need of mode-matching, and it has the ability to model realistic, smooth transitions. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Place, publisher, year, edition, pages
Optical Society of America , 2020. Vol. 3, no 1, p. 67-76
National Category
Physical Sciences
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-92300DOI: 10.1364/OSAC.379847ISI: 000507977200008Scopus ID: 2-s2.0-85105689607OAI: oai:DiVA.org:lnu-92300DiVA, id: diva2:1395185
Available from: 2020-02-21 Created: 2020-02-21 Last updated: 2021-09-21Bibliographically approved

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Nordebo, Sven

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