Title :
High Extinction Ratio Circular Polarizer With Conical Double-Helical Metamaterials
Author :
Zhao, Zhe ; Gao, Dingshan ; Bao, Changjing ; Zhou, Xu ; Lu, Tingting ; Chen, Lin
Author_Institution :
Wuhan Nat. Lab. for Optoelectron., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
Recently, circular polarizer with cylindrical double-helical metamaterials has been proposed to broaden the operation band of cylindrical single-helical metamaterials, but its extinction ratio is deteriorated. In this paper, we proposed a circular polarizer with conical double-helical metamaterials, which have a large extinction ratio of 83:1, more than four times higher than that of cylindrical double-helical metamaterials. Furthermore, we gave a qualitative interpretation about this phenomenon through analyzing the interaction between two helical wires in one unit cell of the circular polarizer.
Keywords :
metamaterials; optical polarisers; conical double-helical metamaterials; high extinction ratio circular polarizer; one unit cell; Extinction ratio; Magnetic materials; Metamaterials; Optical polarization; Optical refraction; Optical variables control; Wires; Chiral media; metamaterials; polarization;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2012.2200095
