The Fabrication Of Composite Glasses Consisted Of Glasses And Ni Nanoparticles And Their Optical Nonlinearites

Nanocomposite materials are arousing public attention because of their potential application on optoelectronic technology and information. Moreover,glass nanomaterials consisting of metallic nanopartices (NPs) dispersed in insulated glass are especially the hot spot of research in the field due to great potential in fabricating photonic devices. The majority of researches on the topic have focused on the glass nanocomposite incorporated into noble metal NPs such as Au, Ag, Cu NPs in recent years. It is worth mentioning that the report of the glass nanocomposites containing cheaper nickel NPs is far from sufficient in the field of optical nonlinearities. For the purpose, the main contents of the paper are divided into the following points: firstly, the various types of Ni NPs (Ni, NiO, Cu0.8Ni0.9) doped sodium borosilicate glasses are prepared using sol-gel processes combined with controlled atmosphere. Then,based on the microstructure characterization of as-obtained glasses, we study their nonlinear optical properties and related nonlinear optical parameters by Z-Scan technology, and then evaluate their application value in nonlinear optical devices. According to the above points, the research contents of the article are summarized as follows:1.On the basis of successfully fabricating sodium borosilicate glasses containing metallic Ni NPs using sol-gel process plus controlled atmosphere heat treatment, we place emphasis on the microstructure characterization of as-obtained glasses and their third-order nonlinear optical properties. Fourier transform infrared (FTIR) spectra are used to analyze the feasibility of the preparation method. X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) are employed to characterize the microstructure of the as-obtained glasses. The results show that metallic Ni NPs have been dispersed uniformly in the sodium borosilicate glass substrate. At the same time,the nonlinear optical parameters of glasses are studied employing two kind of Z-Scan laser system. On one side, we employed a Light Conversion Yb-KGW fs laser system (the pulse width of 190 fs, the repetition rate of 20Hz and the wavelength of 800nm). On the other hand, we used a Ekspla Nd-YAG ps laser system (the pulse width of 21ps, the repetition rate of 10Hz and the wavelength of 532nm). The third-order nonlinear susceptibility?(3) of the glass samples reached to ?10-14 esu and ?10-12 esu, respectively.2. Based on successfully fabricating sodium borosilicate glasses doped with NiO NPs using sol-gel process plus controlled atmosphere heat treatment,we focus on studying the microstructure characterization of as-obtained glasses and their third-order nonlinear optical effects. X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) are used to characterize the microstructure of the as-obtained glasses. The results show that NiO NPs with the size of 6.12nm have been produced uniformly in the sodium borosilicate glass. Meanwhile, the nonlinear optical effects of glass are studied using two kind of Z-Scan lasers (the pulse width of 190 fs, the repetition rate of 20Hz, the wavelength of 800nm and the pulse width of 21 ps, the repetition rate of 10Hz , the wavelength of 532nm). Results indicate that in the former case, the third-order nonlinear susceptibility ?(3) of the glass is 1.371 �10-14 esu.In the latter case, the third-order nonlinear susceptibility ?(3) of the glass sample is 4.261 �10-12esu.3. Based on successfully fabricating sodium borosilicate glasses containing Cu0.81Ni0.19 NPs using sol-gel process plus controlled atmosphere heat treatment, we focus on studying the microstructure characterization of as-obtained glasses and their third-order nonlinear optical properties. For comparison, the pure glass and the glass containing Cu NPs are synthesized by the same thermal process in the absence of Ni. X-ray powder diffraction (XRD)and transmission electron microscopy (TEM) analyses are used to characterize the microstructure of the glasses. The results reveal that Cu0.81Ni0.19NPs with the size of 11.5nm have been formed uniformly in the glass substrate. Then, the nonlinear optical effects of glasses are studied using Z-Scan technology (the pulse width of 190fs, the repetition rate of 20Hz, the test wavelength of 800nm.Results demonstrate that the glass containing Cu0.81Ni0.19 NPs shows enhanced optical nonlinearities comparable to that of the pure glasses and the glass incorporated with Cu NPs.