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Chiral metamaterial composed of three-dimensional plasmonic nanostructures

: Helgert, C.; Pshenay-Severin, E.; Falkner, M.; Menzel, C.; Rockstuhl, C.; Kley, E.-B.; Tünnermann, A.; Lederer, F.; Pertsch, T.


Nano Letters 11 (2011), No.10, pp.4400-4404
ISSN: 1530-6984
ISSN: 1530-6992
Journal Article
Fraunhofer IOF ()

We 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.