Guiding Line Plasmons Between Complementary Plasmonic Metasurfaces

One-dimensional waves guided along the boundary between two complementary metasurfaces have been theoretically and experimentally demonstrated in microwaves. However, it is rather a challenging task to scale down the structures to made them work in mid-infrared because Babinet's principle is usually violated. To circumvent this issue, we propose to use thin films of silicon and silver with thickness about 13 nm in which case the validity of Babinet's principle is recovered.