Theoretical study on the closed-aperture Z-scan curves in the materials with nonlinear refraction and strong nonlinear absorption

Electrosynthesis and characterization of [Cu(Taab)(H2O)2](L)2 non-crystalline thin films

“…On the other hand, the Z-Scan curve for a naked reference glass substrate (not shown here) exhibits negligible nonlinear refraction when compared to the curves obtained for the molecular films at the same laser power regime. Taking into account the theory developed by Sheik-Bahae et al and Liu et al [13][14][15][16][17][18], it is observed from our measurements that the nonlinear refractive response of the films can be unambiguously determined by The respective theoretical fits (TFs) to the obtained Z-Scan transmission data (solid lines) are also shown in Fig. 5.…”

“…In order to perform the TFs according to previous theoretical studies, the normalized transmittance T N can be determined as a function of the dimensionless sample position (x = z/z 0 ) , where z 0 is the Rayleigh range and z is the Z-Scan sample position. Hence, the TFs were obtained according to the following equation, considering both nonlinear refraction and absorption effects [18]:…”

Anisotropic Second- and Third-Order Nonlinear Optical Response from Anisotropy-Controlled Metallic Nanocomposites

“…For NLA, the fitting was made following (Liu et al, 2001; www.intechopen.com Anisotropic Second-and Third-Order Nonlinear Optical Response from Anisotropy-Controlled Metallic Nanocomposites 75 Wang et al, 2010), where the presence of saturable and induced absorption is modeled through the following relationship:…”

Investigation on third-order nonlinear optical properties of two Au(dmit)2/PMMA thin films by Z-scan technique in picosecond pulse regime

“…Therefore, the nonlinear refraction (NLR) plays a dominant role compared with the nonlinear absorption (NLA) of both materials. In general, to distinguish the NLR and NLA, the normalized transmittance dependence can be presented as follows [25,26]:…”