Modelling of free-form conformal metasurfaces

Nature Communications
Kedi WuPatrice Genevet

Abstract

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.

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Citations

Nov 24, 2018·Advanced Materials·Rajath SawantPatrice Genevet
Jan 18, 2019·Optics Express·Na HanYongtian Wang
Aug 14, 2020·Applied Optics·A TrubinV R Tuz
Dec 12, 2019·Advanced Materials·Wenbo ZangShining Zhu
Sep 13, 2019·Optics Express·Volodymyr I FesenkoVladimir R Tuz
Apr 10, 2021·Light, Science & Applications·He-Xiu XuCheng-Wei Qiu
Oct 2, 2021·ACS Applied Nano Materials·Mohsin HabibHumeyra Caglayan
Feb 10, 2021··Konstantin Dorfman, Prasoon Saurabh

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