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Strong optical activity from twisted-cross photonic metamaterials

Decker, M.; Ruther, M.; Kriegler, C. E.; Zhou, J.; Soukoulis, C. M.; Linden, S.; Wegener, M.


Following a recent theoretical suggestion and microwave experiments, we fabricate photonic metamaterials composed of pairs of twisted gold crosses using two successive electron-beam-lithography steps and intermediate planarization via a spin-on dielectric. The resulting two effective resonances of the coupled system lie in the 1–2β€‰πœ‡m wavelength regime and exhibit pronounced circular dichroism, while the circular polarization conversion is very small. In between the two resonances, we find a...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Optics Letters
DOI: 10.1364/OL.34.002501


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