Fig. 3

Tuning the far-field response of SmS metamaterials in the visible and IR range. a Reflectance spectra (solid lines) of golden visible MM grating and red visible MM grating, compared to an unpatterned semiconducting reference at 295 K. The data are fit (dashed lines) using the Drude dielectric model, which shows the shift of the plasma edge. b IR spectra (solid lines) of a fishnet and grating MM as well as reference unpatterned semiconducting and metallic (golden) surfaces at 295 K. The data are fit using effective medium theory (dashed lines), indicating the overall reflectance change is a function of metallic fill fraction. Schematics of the 20 × 20 μm regions of the fishnet (lower left) and grating (lower right) are shown in the inset. c CST simulations of the experimental data in b, reproducing the peaks observed in the MM structures. Schematics of the four simulated regions are shown as insets