Helgert, C.C.HelgertPshenay-Severin, E.E.Pshenay-SeverinFalkner, M.M.FalknerMenzel, C.C.MenzelRockstuhl, C.C.RockstuhlKley, E.-B.E.-B.KleyTünnermann, A.A.TünnermannLederer, F.F.LedererPertsch, T.T.Pertsch2022-03-042022-03-042011https://publica.fraunhofer.de/handle/publica/22581710.1021/nl202565eWe introduce a top-down fabricated metamaterial composed of three-dimensional, chiral, plasmonic nanostructures for visible and near-infrared wavelengths. Based on a combined spectroscopic and interferometric characterization, the entire complex transmission response in terms of a Jones matrix is disclosed. Particularly, the polarization output state of light after propagation through the nanostructures can be decoded from the measurements for any excitation configuration. We experimentally found a rotation of the polarization azimuth of linearly polarized light exceeding 50degrees at wavelengths around 1.08 mum. This corresponds to a specific rotation which is significantly larger than that of any linear, passive, and reciprocal medium reported to date.en620journal article