Modelling of free-form conformal metasurfaces

Artificial 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 condit...

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Main Authors: Wu, Kedi, Coquet, Philippe, Wang, Qi Jie, Genevet, Patrice
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/89104
http://hdl.handle.net/10220/46074
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-891042020-03-07T14:02:35Z Modelling of free-form conformal metasurfaces Wu, Kedi Coquet, Philippe Wang, Qi Jie Genevet, Patrice School of Electrical and Electronic Engineering CINTRA CNRS/NTU/Thales Center for OptoElectronics and Biophotonics Finite Difference Time-Domain (FDTD) Conformal Metasurfaces DRNTU::Engineering::Electrical and electronic engineering Artificial 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. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2018-09-24T06:27:23Z 2019-12-06T17:17:56Z 2018-09-24T06:27:23Z 2019-12-06T17:17:56Z 2018 Journal Article Wu, K., Coquet, P., Wang, Q. J., & Genevet, P. (2018). Modelling of free-form conformal metasurfaces. Nature Communications, 9(1), 3494-. doi:10.1038/s41467-018-05579-6 https://hdl.handle.net/10356/89104 http://hdl.handle.net/10220/46074 10.1038/s41467-018-05579-6 en Nature Communications © 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 http://creativecommons.org/licenses/by/4.0/. 8 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Finite Difference Time-Domain (FDTD)
Conformal Metasurfaces
DRNTU::Engineering::Electrical and electronic engineering
spellingShingle Finite Difference Time-Domain (FDTD)
Conformal Metasurfaces
DRNTU::Engineering::Electrical and electronic engineering
Wu, Kedi
Coquet, Philippe
Wang, Qi Jie
Genevet, Patrice
Modelling of free-form conformal metasurfaces
description Artificial 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.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Wu, Kedi
Coquet, Philippe
Wang, Qi Jie
Genevet, Patrice
format Article
author Wu, Kedi
Coquet, Philippe
Wang, Qi Jie
Genevet, Patrice
author_sort Wu, Kedi
title Modelling of free-form conformal metasurfaces
title_short Modelling of free-form conformal metasurfaces
title_full Modelling of free-form conformal metasurfaces
title_fullStr Modelling of free-form conformal metasurfaces
title_full_unstemmed Modelling of free-form conformal metasurfaces
title_sort modelling of free-form conformal metasurfaces
publishDate 2018
url https://hdl.handle.net/10356/89104
http://hdl.handle.net/10220/46074
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