Investigation of Linear and Nonlinear Behaviors of Silver Oxide Nanoparticles In Graphene Oxide Solution

In this research, linear and non-linear optical properties of silver oxide nanoparticles in graphene oxide medium have been investigated. First, graphene oxide is prepared by the improved method of Hammers. Then the synthesis of silver oxide nanoparticles is carried out in the environment of graphene oxide diluted with deionized water, by the electric arc method. The electric arc was applied at  200, 300, 400, and 500 volts with a three-second pulse duration of one minute. The results of ultraviolet-visible spectroscopy show that the resulting solution contains nanoparticles of graphene oxide and silver oxide.  Then, a CW 532 nm beam with a maximum power of 300 mW was used to determine the linear absorption of samples. Then, the z-scanning method was used to determine the nonlinear characteristics of the samples. After analyzing the graphs, the refraction and nonlinear absorption coefficients of each sample have been calculated. The results show that with increasing voltage, the concentration of nanoparticles produced in the samples increases and the linear absorption coefficient increases with it. The lowest value of linear absorbance is 1.31 (cm-1) and nonlinear absorbance is negative for all samples and its lowest value is 7.86 *10-3. Also, the nonlinear refractive index is negative for all the samples and its maximum value is 1. 61 *10-14. The thermo-optical coefficients of each of the samples have also been obtained.