Figure shows the optical reflection and transmission spectra within visible to near-IR and near-IR to MIR wavelengths regions, respectively. A low reflectance was observed for the thin-Au MIM samples. The reflective properties of metasurface can be explained by coupling between plasmon resonance of metal nanodiscs and induced plasmon resonance of the metal ground plate. If the thickness of metal ground plate become thinner than the skin depth in the metal (at that wavelength), the induced plasmon resonance at Au-SiO 2 interface is expected. Then a re-radiation forward is expected from metasurface at such conditions. Such feature was recognisable in the transmittance spectra as well. Transmission was well suppressed to less than 10% and their reflectance spectra show strong anti-reflection properties.