Modeling AIxGa1-xAs optical constants as functions of composition

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Snyder, Paul G.; Woollam, John A.; Alterovitz, Samuel A.; Johs, Blaine D.
Electrical and Computer Engineering
article description
Three models for the dielectric function εx (hv) of AgxGa11-xAs are reviewed. All are based on measured optical constants at discrete compositions. The validity of each mode1 near critical pint energies, and otherwise, is evaluated. Only the energy-shift model is appropriate over the entire available spectrum ( 1.5-6.0 eV), including the band-gap (E0) region.