期刊
OPTICS LETTERS
卷 34, 期 16, 页码 2501-2503出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.34.002501
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资金
- European Commission [213390]
- Bundesministerium fur Bildung and Forschung (BMBF)
- Helmholtz-Hochschul-Nachwuchsgruppe [VH-NG-232]
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 1-2 mu m wavelength regime and exhibit pronounced circular dichroism, while the circular polarization conversion is very small. In between the two resonances, we find a fairly broad spectral regime with strong optical activity, i.e., with a pure rotation of incident linear polarization. The measured optical transmittance spectra agree well with theory. (C) 2009 Optical Society of America
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