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. 2015 Sep 22;6:8379. doi: 10.1038/ncomms9379

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(a,b) Scanning electron microscope images of the LH (a) and RH (b) metamaterial before spin coating the PMMA spacer layer. The inset shows a unit cell of the chiral metamaterial. Scale bar, 500 nm. (c) Schematic of experimental set-up. (d,e) Experimentally measured optical absorption spectra under LCP (blue) and RCP (red) illumination for LH (d) and RH (e) metamaterials. (f) Experimentally measured circular dichroism spectra for both LH (blue) and RH (red) metamaterials. (g,h) Experimentally measured (dots) and theoretically calculated (solid curve) photoresponsivity spectra under LCP (blue) and RCP (red) illumination for LH (g) and RH (h) metamaterials. (i) Photocurrent polarization discrimination ratio spectra of LH and RH metamaterials. The metamaterials measured have overall areas of 70 × 70 μm².