Optical characterization of reflection spectra of metasurface has performed using a microscope (IRT-1000) combined with a Fourier transform infrared spectrometer FTIR (FT-IR 6200). A 350 nm thickness Au film, which has 0 transmission and ∼98% reflectance, was used as a calibration reference. Thermal radiation emitted from metasurfaces was acquired using a similar FTIR system that was customized to use the MIM device as an external light source . Black body radiation (94% radiation blackbody paint) is used for the references of thermal radiation measurements.