Published online by Cambridge University Press: 22 February 2011
The results of emissivity of (a) Si and SiO2 /Si in the temperature range of 320 to 1240 K and (b). HgCdTe at temperatures of 303 and 440 K, using Fourier Transform Infrared(FTIR) spectroscopy, in the wavelength range of 1.5 to 20 μm, have been reported here. The measurements on SiO2 /Si have been performed for oxide thickness ranging from 60 to 500 nm. These results coufled with calculations of emissivity from first principles lead us to model the wavelength dependence of emissivity. Emissivity estimates have been obtained for HgCdTe using its fundamental optical constants.