||D. A. B. Miller, D. S. Chemla, P. W. Smith,
and A. C. Gossard, "Large Nonlinearities in Room-Temperature GaAs Structures" J.
Opt. Soc. Am. 72, 1783 (1982).
We report studies of nonlinear optical
effects associated with absorption saturation in GaAs and in GaAs-GaAlAs
multiple-quantum-well (MQW) structures at room temperature near the bandgap wavelength.