| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1516074 | Journal of Physics and Chemistry of Solids | 2012 | 7 Pages |
Nanocomposites of ZnSe nanoparticles embedded in polyvinyl alcohol (PVA) matrix have been prepared by in-situ synthesis. ZnSe/PVA nanocomposites are characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and UV/Vis spectra. The nanocomposite structure is confirmed by the blue-shift of the absorption edge. The nonlinear refractive index and two-photon absorption (TPA) coefficient are measured by the Z-scan technique using low power CW He–Ne laser light. The results show that the ZnSe nanocomposite films show large optical nonlinearity and the magnitude of the third-order nonlinear susceptibility χ(3) is calculated to be 2.62×13−11 m2/V2.
► In-situ synthesis of ZnSe/PVA via Chemical Bath Method at room temperature. ► Polyvinyl alcohol (PVA) coating to prevent the photo oxidation of ZnSe nanoparticles. ► From TEM image, the particle morphology of nanocomposites is of spherical type. ► Band gap of ZnSe/PVA nanocomposites Eg≈2.73 eV due to quantum confinement effect. ► Negative type of optical nonlinearity of ZnSe/PVA studied by Z-scan technique.
