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dc.contributor.authorWu, Kedien
dc.contributor.authorCoquet, Philippeen
dc.contributor.authorWang, Qi Jieen
dc.contributor.authorGenevet, Patriceen
dc.identifier.citationWu, K., Coquet, P., Wang, Q. J., & Genevet, P. (2018). Modelling of free-form conformal metasurfaces. Nature Communications, 9(1), 3494-. doi:10.1038/s41467-018-05579-6en
dc.description.abstractArtificial electromagnetic surfaces, metasurfaces, control light in the desired manner through the introduction of abrupt changes of electromagnetic fields at interfaces. Current modelling of metasurfaces successfully exploits generalised sheet transition conditions (GSTCs), a set of boundary conditions that account for electric and magnetic metasurface-induced optical responses. GSTCs are powerful theoretical tools but they are not readily applicable for arbitrarily shaped metasurfaces. Accurate and computationally efficient algorithms capable of implementing artificial boundary conditions are highly desired for designing free-form photonic devices. To address this challenge, we propose a numerical method based on conformal boundary optics with a modified finite difference time-domain (FDTD) approach which accurately calculates the electromagnetic fields across conformal metasurfaces. Illustrative examples of curved meta-optics are presented, showing results in good agreement with theoretical predictions. This method can become a powerful tool for designing and predicting optical functionalities of conformal metasurfaces for new lightweight, flexible and wearable photonic devices.en
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.format.extent8 p.en
dc.relation.ispartofseriesNature Communicationsen
dc.rights© 2018 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectFinite Difference Time-Domain (FDTD)en
dc.subjectConformal Metasurfacesen
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen
dc.titleModelling of free-form conformal metasurfacesen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
dc.contributor.researchCINTRA CNRS/NTU/Thalesen
dc.contributor.researchCenter for OptoElectronics and Biophotonicsen
dc.description.versionPublished versionen
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