Open AccessEfficient multiband and broadband cross polarization converters based on slotted L-shaped nanoantennas
Author(s) -
Jun Ding,
Bayaner Arigong,
Han Ren,
Mi Zhou,
Jinghai Shao,
Yuankun Lin,
Hualiang Zhang
Publication year - 2014
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.22.029143
Subject(s) - converters , broadband , optics , polarization (electrochemistry) , metamaterial , linear polarization , physics , ground plane , optoelectronics , materials science , telecommunications , computer science , laser , chemistry , quantum mechanics , voltage , antenna (radio)
In this paper, we presented highly efficient reflective cross polarization converters based on metamaterials operating in the infrared regime, which are composed of a dielectric spacer sandwiched between slotted L-shaped metallic nanoantennas and a ground plane. The proposed polarization converters can convert a linearly polarized wave to its cross polarized wave with high polarization conversion ratio (> 0.95) over multiple / broad frequency bands. The resulting multi-band and broadband operations are induced by the localized mode hybridizations between the slot and the original metallic nanoantenna. Furthermore, the performance of the proposed converters under different incident angles is also explored. It is found that the first broad band (or the first two resonant frequencies) of the proposed broadband (or multi-band) converters appears to be independent of the incident angle (up to 47°).