Asymmetric properties of Babinet complementary metamaterial multilayers

Spectral regions of asymmetric transmission and polarization rotation were determined on a highly reflective and moderately chiral metamaterial constructed with concave-convex-concave Babinet complementary patterns. By optimizing the orientation of the composing nanocrescents surrounding the central nanorings in the pair of mirrored convex-concave patterns forming a wavelength-scaled cavity, enhanced asymmetric transmission and chirality, as well as large generalized Faraday rotation was achieved without any external bias.