Refractive index of Al<i>x</i>Ga1−<i>x</i>As between 1.2 and 1.8 eV

The refractive indices of AlxGa1−xAs samples prepared by liquid-phase epitaxy were determined from accurate double-beam reflectance measurements. The variation of the refractive index with photon energy at room temperature was obtained for AlAs mole fractions between 0 ≤ x ≤ 0.38 in the spectral range 1.2–1.8 eV.