Open AccessHigher extinction ratio circular polarizers with hetero-structured double-helical metamaterials
Author(s) -
Yang Yu,
Zhenyu Yang,
Shengxi Li,
Ming Zhao
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.010886
Subject(s) - polarizer , metamaterial , extinction ratio , optics , extinction (optical mineralogy) , circular polarization , physics , materials science , helix (gastropod) , birefringence , wavelength , ecology , snail , biology , microstrip
We have recently shown circular polarizers with the homo-structured double-helical metamaterials, which have broader operation bands than those of the single-helical structures [Opt. Lett. 35, 2588 (2010)]. However, trying to get more operation bands deteriorates the extinction ratio. In this paper, we proposed circular polarizers with hetero-structured double-helical metamaterials. The extinction ratios of these circular polarizers are two times higher than those with homo-structured double-helical metamaterials. Furthermore, we qualitatively explained the phenomenon of the higher extinction ratio from the viewpoint of the interaction between the two helix-wires in a double-helical unit.