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Proceedings Paper

Coupled mode theory for metasurface design
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Paper Abstract

Efficient theoretical modeling of metasurface is highly desired for designing metasurfaces. However, most of current modeling of metasurfaces relies on full-wave numerical simulation methods that solve the Maxwell’s equations. As a metasurface typically consists of many meta-units, solving Maxwell’s equations is computationally expensive and thus inefficient for designing metasurface. Here, we develop a general theoretical framework for modeling metasurface based on the coupled mode theory (CMT), which fully describes the interaction between the meta-units and light by a simple set of coupled-mode equations. Consequently, the CMT formulism is far less computationally demanding than the Maxwell’s equations. We show that our CMT approach allows us to quickly and efficiently optimize the design of a beam-steering metagrating. The optimal design obtained from our CMT model is further validated by numerical simulation. The proposed CMT model provides an efficient tool to model and design optical devices based on multiple optical resonators.

Paper Details

Date Published: 5 September 2019
PDF: 7 pages
Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 110802L (5 September 2019); doi: 10.1117/12.2528909
Show Author Affiliations
Ming Zhou, Univ. of Wisconsin-Madison (United States)
Samuel W. Belling, Univ. of Wisconsin-Madison (United States)
Haotian Chen, Peking Univ. (China)
Zongfu Yu, Univ. of Wisconsin-Madison (United States)

Published in SPIE Proceedings Vol. 11080:
Metamaterials, Metadevices, and Metasystems 2019
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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