The thickness of the dielectric layer around 250 nm is in the vicinity of a good match for the 1000-2000 cm -1 window, where molecular vibration exists. The film thickness of the dielectric MIM layer around 250 nm was adjusted so that the plasmon resonance was fine-tuned to the required spectral location in the 1000-2000 cm -1 spectral window, where the molecular vibrations exist. The reason for the decrease in the k peaks (absorption) is as follows: 1) the intensity of each peak decreases because it is combined with absorption peaks of SiO 2 and 2) the loss of the plasmon resonance itself due to an excessive absorption. As per our previous analysis, we found that the resonance is easily impaired when the absorption coefficient increases due to, for example, the conductivity of the dielectric layer . If the effect of the weak absorption peak is no longer observed, the (1-R) peak does not immediately recover, suggesting that the effect of the loss due to absorption is significant. In this study, the dielectric constant ε 1 of SiO 2 is modulated by Lorenz-type absorption, where the imaginary part of the constant ε 2 increases to nearly 10. When the plications as intense narrow-band IR emitters at the chemical finger printing spectral range. The proposed design is superior to the earlier realisation of similar IR radiators based on polyimide/kapton MIMs. The emitted wavelength-integrated power of black body radiation is defined via the Stefan-Boltzmann law and scales with the absolute temperature T as P = σ R Area × T 4 while the peak wavelength of emission is defined by the Wien's law λ max = a/T , where σ R , a are constants. An increase of temperature results in practical augmentation of the radiated power. The MIM metasurfaces with disk diameters D > 2 µm are amenable by simpler photo-lithography and direct laser writing techniques, which are more practical for applications .