Designs of Helix Metamaterials for Broadband and High-Transmission Polarization Rotation

被引：8
作者：
Huang, Hsiang-Hung [1 ]
Hung, Yu-Chueh [1 ,2 ]
机构：
[1] Natl Tsing Hua Univ, Inst Photon Technol, Hsinchu 30013, Taiwan
[2] Natl Tsing Hua Univ, Dept Elect Engn, Hsinchu 30013, Taiwan
来源：
IEEE PHOTONICS JOURNAL | 2014年 / 6卷 / 05期
关键词：
Chiral media; metamaterials; optical activity; polarization; CIRCULAR POLARIZERS; PHOTONIC METAMATERIAL;
D O I：
10.1109/JPHOT.2014.2352636
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Artificial optical activity can be realized using chiral metamaterials, in which chirality is normally implemented with rotationally stacked planar structures. However, such geometries usually suffer from great loss and limited operation bandwidth, which may hinder their usage in many applications. In this study, by incorporating genetic algorithm for geometry optimization, we present designs of helix metamaterials that exhibit high transmission above 95% and a broad bandwidth with low ellipticity. The optical characteristics are described, and the nature behind the high transmission and broad bandwidth is discussed.
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页数：7
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