Preparation and the third-order optical nonlinearities of the sodium borosilicate glass doped with Cu7.2S4 quantum dots |
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| Authors: | Weidong Xiang Haijun Zhao Jiasong Zhong Yuqing Guo Zhaoping Chen Hongyan Luo Xiuli Zhao Xiaojuan Liang Xinqi Yang |
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| Institution: | 1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, PR China;2. College of Materials Science and Engineering, Tongji University, Shanghai 201804, PR China;3. College of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China |
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| Abstract: | The sodium borosilicate glass doped with Cu7.2S4 quantum dots was prepared by using both sol–gel and atmosphere control methods. The formation mechanism and the microstructure of the glass were examined using differential thermal analysis and thermal gravimeter (TG-DTA), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), energy dispersive X-ray spectra (EDX), high-resolution transmission electron microscopy (HRTEM), and selected area electron diffraction (SAED). The results revealed that Cu7.2S4 quantum dots in orthorhombic crystal system had formed in the glass, and the size ranged from 9 nm to 21 nm. In addition, Z-scan technique was used to measure the third-order optical nonlinearities of the glass. The results indicated that the third-order optical nonlinear refractive index γ, the absorption coefficient β, and the susceptibility χ(3) of the glass were 1.11 × 10? 15 m2/W, 8.91 × 10? 9 m/W, and 6.91 × 10? 10 esu, respectively. |
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