Abstract
The linear and nonlinear optical absorption coefficients (ACs) and refractive index (RI) changes are obtained by using a compact density matrix approach and an iterative procedure. With typical semiconducting GaAs materials, the linear, third-order nonlinear, total optical absorption coefficients and the optical refractive index have been examined. We find that the polaron effect has an important influence on the linear and nonlinear optical properties.
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