On the linearly and nonlinearly optical for the TiO2/rGO nanocomposite prepared by pulse Laser ablation in Liquid

Abstract

A nanostructured film composed of TiO2 and reduced graphite oxide (rGO), the grapheme Flakes were prepared by reduction graphite oxide which was prepare use pulse laser ablation in double distilled and de-ionized water (DDDW) by (Q-switcher, Nd:YAG repetitive modified 6 Hz and the pulse duration 10ns) used wavelength 1064nm, 532nm, E=300mj and 1000pulses, The linear optical measurements showed that nanostructure (TiO2 /rGO) thin films have direct energy gap. Morphology of the thin films was studied by characterized by means of X-ray diffraction (XRD). The particle size was calculated by using equation Debye-Scherer, The micrographs of scanning electron microscopy (SEM) showed that TiO2/rGO has a fluffy aggregation and the form of grapheme as a flakes, AFM results show that the grain size increase by increasing wavelength. Also in theses papers, the nonlinearity property on this nanocomposite, such as nonlinearly index and nonlinearly absorption coefficients have measured use means of the rings diffraction set-up Z-scan techniques. It is educe that this prepared composite has extreme nonlinearity owing to the two photon absorption (TPA) and optical limiter phenomenally.