Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 73, Issue 9, Pages 1075-1081Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2012.04.007
Keywords
Polymer; Chemical synthesis; X-ray diffraction; Optical properties
Funding
- DST (Major Research Project), N. Delhi
- UGC, N. Delhi
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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 chi((3)) is calculated to be 2.62 x 13(-11) m(2)/V-2. (C) 2012 Elsevier Ltd. All rights reserved.
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