Z-scan investigation to evaluate the third-order nonlinear optical properties of cauliflower-like VS2 structures

VS2 was prepared via the hydrothermal method and changing the reaction time and employing surfactant. The microstructural characterizations show the control of sheet dimensions and growth of crystal planes. The Z-scan study demonstrates the positive nonlinear n(2) due to the self-focusing effect and the two-photon absorption for nonlinear absorption. These results imply the effect of lateral dimensions of sheets in cauliflower-like structures on nonlinear optical responses. Also, the nonlinear optical susceptibility chi((3)) is as high as 10(-10) (esu). This study shows that the VS2 flower-like structure and its similar nanostructures are promising materials for nonlinear optical applications and further considerations. (C) 2021 Optical Society of America