Currently used IR thermal radiation sources can be heated up to nearly 600 • C, way above polyimide's limit. Therefore, it is desirable to realize a light source which can be used even at such high temperatures at which emission is more intense. Naturally, the use of inorganic materials or organic-inorganic hybrids is an excellent way to improve the heat resistance of the MIM metasurface. For example, SiO 2 , which has a good optical transmission characteristics in the UV-visible region, has an absorption in the mid-IR spectral window. In the case of thick glass, it is well known visible to mid-IR wavelength range. CaF 2 is used in high-grade camera lenses because of its ability to suppress chromatic aberration by its anomalous dispersion characteristic. CaF 2 is also used as an optical component in IR spectroscopic systems due to the aforementioned high transmission up to mid-IR.