Ding Jun, Arigong Bayaner, Ren Han, Zhou Mi, Shao Jin, Lin Yuankun, Zhang Hualiang
Opt Express. 2014 Nov 17;22(23):29143-51. doi: 10.1364/OE.22.029143.
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°).
在本文中，我们展示了基于在红外波段工作的超材料的高效反射式交叉极化转换器，其由夹在带缝隙的L形金属纳米天线和接地平面之间的电介质间隔层组成。所提出的极化转换器能够在多个/宽频带上将线偏振波转换为其交叉偏振波，且具有高偏振转换率（>0.95）。所产生的多频段和宽带操作是由缝隙与原始金属纳米天线之间的局域模杂化引起的。此外，还研究了所提出的转换器在不同入射角下的性能。结果发现，所提出的宽带（或多频段）转换器的第一宽带（或前两个共振频率）似乎与入射角（高达47°）无关。
