An assessment of some theoretical models used for the calculation of the refractive index of InXGa1−xAs

Theoretical models used for the determination of the refractive index of InXGa1−XAs are reviewed and compared. Attention is drawn to some problems experienced with some of the models. Models also extended to the mid-infrared region of the electromagnetic spectrum. Theoretical results in the mid-infrared region are then compared to previously published experimental results.