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Proceedings Paper

Bilayer metasurface for directional launching of cross-polarization component
Author(s): Joonsoo Kim; Yohan Lee; Hansik Yun; Hyeonsoo Park; Byoungho Lee
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Paper Abstract

In this paper, we propose a bilayer metasurface which is capable of launching helicity-inverted wave only in the forward direction. In order to obtain directional scattering characteristics of individual cells, we employed two layers of thin metasurfaces that are separated by a dielectric spacer. Multiple scattering analysis is used to derive design conditions for single metasurface reflectances for each polarization and it was shown that such target reflectances are realizable with split-ring aperture. The unit cell structure optimized for forward-only scattering of cross-polarization component is shown to have power extinction ratio as high as 32. The proposed structure can potentially form a supercell with reflective cells so that geometric phases of transmitted light and reflected light can be independently controlled. The proposed scheme is expected to pave a way to new types of metasurfaces with multiplexed optical functions.

Paper Details

Date Published: 31 October 2016
PDF: 7 pages
Proc. SPIE 10022, Holography, Diffractive Optics, and Applications VII, 100222E (31 October 2016); doi: 10.1117/12.2247798
Show Author Affiliations
Joonsoo Kim, Seoul National Univ. (Korea, Republic of)
Yohan Lee, Seoul National Univ. (Korea, Republic of)
Hansik Yun, Seoul National Univ. (Korea, Republic of)
Hyeonsoo Park, Seoul National Univ. (Korea, Republic of)
Byoungho Lee, Seoul National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 10022:
Holography, Diffractive Optics, and Applications VII
Yunlong Sheng; Chongxiu Yu; Changhe Zhou, Editor(s)

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