Fig. 2. Simulated reflectance and scattering cross-sections of the elliptical meta-atoms, and experimental results.
a Simulated reflectance spectra of the polarization sensitive meta-atoms for (i) red, (ii) green, and (iii) blue colors with the incident light of linear polarization (LP) from along the long axis â (LP 0˚) to along the short axis b̂ of the meta-atom (LP 90˚). As LP is modulated, the reflectance is gradually reduced, until a dark state is produced. b Calculated scattering cross-sections of the meta-atoms to produce (i) red, (ii) green, and (iii) blue colors under LP 0˚. For red, the electric dipole (ED) is dominant, while for green the magnetic dipole (MD) is dominant, and for blue the ED and MD spectrally overlap. Under LP 90˚, the scattering cross-sections for (iv) red, (v) green, and (vi) blue become almost negligible as quasi-guided modes are no longer supported and the scattering is unenhanced. c Measured reflectance spectra for (i) red, (ii) green, and (iii) blue metasurfaces with respect to LP axis from 0 to 90o. d Corresponding optical micrographs of the 100 × 100 µm (i) red, (ii) green, and (iii) blue metasurfaces. The dotted black lines indicate the location of the Rayleigh-Wood anomaly