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[13a-2A-6] First principles calculation of change of optical responses of InSb due to the melting
Keywords:dielectric function,phase transition,first principles calculation
InSb is used as the best candidate material for the active layer in a super-resolution optical disc. In this study, first principles calculation of electronic and optical properties of InSb was carried out for both crystalline and liquid states. The calculated results indicated that due to the phase transition from crystal to liquid, a density of states around Fermi level grows so that an energy band gap opening near Fermi level disappears, and consequently optical properties change from semiconductor to metallic behavior. The optical absorption at the photon energy of 3.06 eV increases due to the melting of InSb. This increase of optical absorption was suggested to result in the increase of the optical transitions below 2 eV.