Effect of cdte nanoparticles on linear and nonlinear optical property of polyvinyl alcohols PVA film

Abstract EN

Linear and nonlinear optical properties of Polyvinyl Alcohol thin film doped with cadmium telluride nanoparticles have been investigated experimentally.

CdTe nanoparticles were produced in distilled water by pulsed laser ablation method under Nd-YAG laser at (100 mJ, 1064nm, 10ns, 6Hz, and 100 laser shots).

AFM images were used to study the nanoparticles after ablation.

XRD pattern and UV– Vis spectroscopy data were used to extract the structure and optical properties of films.

Z-scan technique was employed to characterize of nonlinear optical properties of the films.

The results of close-aperture zscan data suggested that PVA/CdTe nanocomposite film included a nonlinear refractive index with a negative sign, meaning the occur of self-defocusing phenomenon.

While, open-aperture z-scan data clearly suggested two-photon absorption as the dominant nonlinear absorption mechanism.

The nonlinear property of PVA film was found increasing and strongly after added nanoparticles in them.