Table 1 provides a summary of the saturation intensity Is two-photon coefficient β and three-photon coefficient γ at different excitation wavelengths To compare our results we also include some GaN cr

Table 1 summarizes the saturation intensity Is, two-photon coefficient β, and three-photon coefficient γ at various excitation wavelengths. In order to compare our findings, we have also included the nonlinear absorption parameters for GaN crystal and other materials in Table 2. It is worth noting that the results of experimental research on nonlinear absorption are significantly influenced by the excitation conditions, such as excitation wavelength, pulse width, and facula area. However, there are limited studies that have utilized the same experimental conditions as ours. Therefore, we have examined relevant studies on GaN crystal and other nano materials that were conducted under similar excitation conditions.