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

Author

Hsiang-Hung Huang ; Yu-Chueh Hung

Author_Institution

Inst. of Photonics Technol., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

6

Issue

5

fYear

2014

fDate

Oct. 2014

Firstpage

1

Lastpage

7

Abstract

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.

Keywords

genetic algorithms; light polarisation; optical metamaterials; optical rotation; broadband polarization rotation; genetic algorithm; geometry optimization; helix metamaterials; high-transmission polarization rotation; low ellipticity; optical characteristics; Biomedical optical imaging; Magnetic materials; Metamaterials; Optical device fabrication; Optical polarization; Optical ring resonators; Optical sensors; Chiral media; metamaterials; optical activity; polarization;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2014.2352636

Filename

6894270