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(a) Show the OA z-scan transmission for Ag/Au alloy solutions in water at various excitation wavelengths from 750 to 850 and a constant power of 1 W. The solid curves were fit using Equation (1). (b) Display the relation between the excitation wavelength and the deduced values of γ for the Ag/Au colloid solution at a constant incident power. The dots represent the experimental data, while the solid line represents the linear fit.
