Nonlinear Optical Properties of Zinc Oxide Nanoparticle Colloids Prepared by Pulsed Laser Ablation in Distilled Water

Abstract

The nonlinear optical properties of zinc oxide nanoparticles (ZnONPs) in distilled water were measured using a femtosecond laser and the Z-scan technique. The ZnONPs colloids were created by the ablation of zinc bulk in distilled water with a 532 nm Nd: YAG laser. Transmission electron microscopy, an ultraviolet-visible spectrophotometer, and atomic absorption spectrophotometry were used to determine the size, shape, absorption spectra, and concentration of the ZnONPs colloids. The nonlinear absorption coefficient and nonlinear refractive index were measured at different excitation wavelengths and intensities. The nonlinear absorption coefficient of the ZnONPs colloids was found to be positive, caused by reverse saturable absorption, whereas the nonlinear refractive index was found to be negative due to self-defocusing in the ZnONPs. Both laser parameters, such as excitation wavelength and input intensity, and nanoparticle features, such as concentration and size, were found to influence the nonlinear optical properties of the ZnONPs.

Investigation of structural, linear, and nonlinear optical properties of nanosized zinc oxide and cadmium oxide particles ingrained in graphitic carbon nitrides

“…Evaluated nonlinear parameters like nonlinear absorption coefficient (β), nonlinear refractive index (n 2 ), and nonlinear susceptibility ( 3 c ) by using equation (6) have been displayed in table 2 below. From the table, we can say that graphitic carbon nitride-metal oxide composite samples showed good nonlinear behavior as compared to earlier reported work [23,55]. The nanoparticles embedded show good nonlinear behavior as compared to the graphitic carbon nitrides.…”

Breaking Barriers in Eco-Friendly Synthesis of Plant-Mediated Metal/Metal Oxide/Bimetallic Nanoparticles: Antibacterial, Anticancer, Mechanism Elucidation, and Versatile Utilizations

“…In general, the presence of a strong plasmon band near 600 nm for copper indicates that spherical Cu NPs have been formed. The colloids of ZnO NPs were formed by laser ablation of zinc bulk in distilled water at 532 nm [340]. Accordingly, absorption spectra are different for different NPs such as the absorption spectra of Ag NPs is 400-450 nm [341].…”