Nonlinear Absorption Properties of GaN: A Comparative Study of Saturation Intensity, Two-Photon, and Three-Photon Coefficients

This study presents a comprehensive analysis of the nonlinear absorption properties of GaN. Table 1 summarizes the saturation intensity (Is), two-photon coefficient (β), and three-photon coefficient (γ) at various excitation wavelengths. To provide a comparative perspective, Table 2 presents data on the nonlinear absorption parameters of GaN crystal and other materials.

It is crucial to acknowledge the significant influence of excitation conditions, such as excitation wavelength, pulse width, and facula area, on the experimental outcomes of nonlinear absorption. Recognizing the scarcity of studies employing identical experimental conditions to ours, we delve into relevant research on GaN crystal and other nano materials conducted under similar excitation conditions. This comparative analysis allows for a more insightful understanding of the nonlinear absorption behavior of GaN.