Revised refractive index and absorption of In_1-xGa_xAs_yP_1-y lattice-matched to InP in transparent and absorption IR-region

For the revision of the refractive indices and absorption of the In1-xGaxAsyP1-y material system lattice matched to InP ellipsometric measurements were carried out. For the first time general parameters for the Tanguy model were determined from these measurements of these material compositions. With the help of these determined Tanguy parameters, the refractive indices and the absorption coefficients were reviewed in transparent and absorption region which includes the near and mid-infrared region. Furthermore, an estimation of the group velocity and the chromatic dispersion is presented for these material compositions.