ABSTRACT
The optical properties of metal nanoparticles (MNPs) have a huge significance in physical chemistry from Faraday’s explorations of colloidal gold in the mid-1800s. It is possible to change the electronic and optical properties of the MNPs during material design, hence the MNPs possess an immense technological significance. Different methods have been used to synthesize MNPs with a broad collection of sizes, shapes, and dielectric environments. In this chapter, the nonlinear optical characteristics of different nanoparticles have been discussed and we have summarized several processes for the preparation of their composite materials. The nonlinear optical properties of these materials were studied by the Z-scan method.
