Li, Z.Zhao, R.Koschny, T.Kafesaki, M.Alici, K. B.Colak, E.Caglayan, H.Özbay, EkmelSoukoulis, C. M.2016-02-082016-02-082010-08-230003-6951http://hdl.handle.net/11693/22252A uniaxial chiral metamaterial is constructed by double-layered four "U" split ring resonators mutually twisted by 90°. It shows a giant optical activity and circular dichroism. The retrieval results reveal that a negative refractive index is realized for circularly polarized waves due to the large chirality. The experimental results are in good agreement with the numerical results.EnglishCircular dichroismCircularly polarized wavesNegative refractive indexNumerical resultsOptical activitySplit ring resonatorDichroismElectronic equipmentLight refractionMetamaterialsNumerical analysisOptical resonatorsRefractometersStereochemistryRefractive indexChiral metamaterials with negative refractive index based on four "U" split ring resonatorsArticle10.1063/1.3457448