Abstract

CdS nanoparticles dispersed in PVA are prepared by Chemical method at room temperature. The nonlinear optical parameters such as nonlinear absorption (β), nonlinear refractive index (n2) and nonlinear susceptibility (χ3) are calculated for this sample by using Z-scan technique. CdS/PVA samples show the two photon absorption mechanism. The third order nonlinear susceptibility is calculated from n2 and β and is found to be of the order of 10−7 – 10−8 m2/V2. The larger value of third order nonlinear susceptibility is due to dielectric and quantum confinement effect.

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