Figure 3From: The electronic and optical properties of quaternary GaAs1-x-yN x Bi y alloy lattice-matched to GaAs: a first-principles studyAbsorption coefficient and refractive index. The absorption coefficient α(ω) and refractive index n(ω) of GaAs (black lines) and GaAs1-x-yN x Bi y (red lines) with x =1/32, y =1/16.Back to article page