Impact of MoS₂ on the nonlinear absorption and optical protection efficiency of SrWO₄ nanocomposites.

This work aims to discuss the impact of the interaction of a high-power laser with the SrWO4/MoS2 nanocomposites synthesized by the solvothermal method. The effect of different concentrations of MoS2 on the structural, morphological, optical and nonlinear optical (NLO) characteristics of SrWO4 nanostructures was studied by utilizing XRD, Raman, FTIR, SEM, TEM, UV–Visible absorption and Open aperture Z-scan technique using Nd: YAG pulsed laser. The composites mitigate the successful interaction of MoS2 in the SrWO4 lattice through standard phase confirmation, change in lattice parameters and induced strain from XRD analysis. The mixed morphology shows the blended nature of composites through HRTEM and SEM. The functional and vibrational modes of nanocomposites were explored by FTIR and Raman spectroscopic techniques. The photoluminescence spectroscopy analyzed the influence of defect states. The optical parameters like absorption edge, band gap energy and Urbach energy were calculated by linear optical studies. Z-scan studies show the reverse saturable nature of all samples with more absorption and less transmittance at the focus. The experiment was extended to the analysis of the optical limiting (OL) behavior studies to understand their potential application in laser safety devices. The higher concentration of MoS2 in the strontium matrix yields a higher nonlinear absorption coefficient of 1. 5 3 1 × 1 0 − 1 0 m/W and a lower optical threshold of 0. 6 1 × 1 0 1 1 W/m2. The inclusion of 20% MoS2 in SrWO4 significantly enhances the nonlinear absorption and the optical limiting ability which can be the best choice of NLO material for future optoelectronics. [ABSTRACT FROM AUTHOR]