Optical properties of polycrystalline InxGa1-xSb (x=0.20) from 15 to 30 um

摘要

This paper reports on the optical properties of polycrystalline p-type In$-x$/Ga$-1$MIN@x$/Sb (x $EQ 0.20) over the wavelength range 15 - 30 $mu@m, at room temperature. The material was obtained by direct synthesis from the elements and rapidly crystallized following a particular temperature regime. Transmittance and reflectance measurements were performed at room temperature by using a SPECORD M80 spectrophotometer. From the resulted values we calculated the absorption coefficient $alpha as a function of the photon energy. Considerations are made concerning the peculiarities involved by the polycrystalline structure and the surface imperfections on the absorption phenomena over the mentioned wavelength range.