Modeling AI_xGa_1-xAs optical constants as functions of composition

Authors

Paul G. Snyder, University of Nebraska-LincolnFollow
John A. Woollam, University of Nebraska-LincolnFollow
Samuel A. Alterovitz, University of Nebraska-Lincoln
Blaine D. Johs, J. A. Woollam Co., Lincoln, Nebraska

Date of this Version

12-1-1990

Comments

Published in J. Appl. Phys. 68 (11), 1 December 1990. Copyright 1990 American Institute of Physics. Used by permission.

Abstract

Three models for the dielectric function ε_x (hv) of Ag_xGa1_1-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.