In this article, we discuss on an in-depth study of the structure and morphology as well as optical (linear/nonlinear) properties of Zinc Phthalocyanine (ZnPc) - Poly (Vinyl Alcohol) (PVA) nanocomposite films. An investigation into the third-order nonlinear absorption properties of the nanocomposite films of ZnPc-PVA system, on excitation with low power continuous wave (CW) laser light at 632.8 nm, for different concentrations of the ZnPc content and at different input intensities, is presented. In these nanocomposites, a transition from Saturable Absorption (SA) to Reverse Saturable Absorption (RSA) was observed, on either increasing fluence or ZnPc content. The estimated values of the effective coefficients of nonlinear absorption (β) and imaginary third-order nonlinear susceptibility (Imχ⁽³⁾) are better than those reported ones. Furthermore, the optical limiting action of these samples is demonstrated. The results suggest that the nanoclustered organic chromophores are dispersed uniformly in the voids/free volumes available between the PVA chains. Standing on these points, it may be noted that the newly fabricated ZnPc-PVA nanocomposite films, which possess excellent surface homogeneity, high laser damage threshold, improved thermal and photostability, and prolonged lifespan (five years or more!), represent an efficient low threshold NLO material with significant potential applications in optoelectronic and photonic devices.

在本文中，我们将对酞菁锌（ZnPc）-聚乙烯醇（PVA）纳米复合薄膜的结构和形态以及光学（线性/非线性）性能进行深入研究。研究ZnPc-PVA系统的纳米复合薄膜在632.8 nm的低功率连续波（CW）激光激发下，对于不同浓度的ZnPc含量和不同的输入强度，其三阶非线性吸收特性的研究。呈现。在这些纳米复合材料中，随着通量或ZnPc含量的增加，观察到从饱和吸收（SA）到反向饱和吸收（RSA）的转变。非线性吸收系数（β）和虚拟三阶非线性磁化率（Imχ ^（3））比那些报告的要好。此外，证明了这些样品的光学限制作用。结果表明，纳米簇有机发色团均匀地分散在PVA链之间的空隙/自由体积中。站在这些观点上，可能会注意到，新制造的ZnPc-PVA纳米复合膜具有出色的表面均匀性，较高的激光损伤阈值，改善的热稳定性和光稳定性以及较长的使用寿命（五年或以上！），代表了有效的低效性能。阈值NLO材料在光电和光子器件中具有重要的潜在应用。