${{\rm{VS}}_2}$ 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 ${{1}}{{{0}}^{- 10}}$ (esu). This study shows that the ${{\rm{VS}}_2}$ flower-like structure and its similar nanostructures are promising materials for nonlinear optical applications and further considerations.

中文翻译：

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Z扫描研究以评估花椰菜状VS ₂结构的三阶非线性光学性质

$ {{\ rm {VS}} _ 2} $是通过水热法，改变反应时间并使用表面活性剂制备的。微观结构表征显示了对片材尺寸和晶面生长的控制。Z扫描研究表明，由于自聚焦效应和用于非线性吸收的双光子吸收，非线性正值{{n_2} $}呈正值。这些结果暗示了菜花状结构中片材的横向尺寸对非线性光学响应的​​影响。而且，非线性光学磁化率$ \ chi ^ {（3）} $高达$ {{1}} {{{0}} ^ {-10}} $（esu）。此研究表明，$ {{\ rm {VS}} _ 2} $ 花状结构及其类似的纳米结构是用于非线性光学应用和进一步考虑的有前途的材料。