高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (08): 1663.doi: 10.3969/j.issn.0251-0790.2012.08.006

• 研究论文: 无机化学 • 上一篇    下一篇

Cu7.2S4量子点玻璃的制备及三阶非线性光学性质

赵海军1, 向卫东1,2, 钟家松2, 杨昕宇1, 郭玉清2, 梁晓娟1, 黄海宇1, 罗洪艳1, 赵秀丽1, 陈兆平1   

  1. 1. 温州大学化学与材料工程学院, 温州 325035;
    2. 同济大学材料科学与工程学院, 上海 200092
  • 收稿日期:2011-11-30 出版日期:2012-08-10 发布日期:2012-08-10
  • 通讯作者: 向卫东, 男, 教授, 博士生导师, 主要从事光学材料研究. E-mail: xiangweidong001@126.com E-mail:haijunzhao2008@163.com
  • 基金资助:

    国家自然科学基金(批准号: 50772075, 50972107, 51172165); 浙江省自然科学基金(批准号: Y4100233)和浙江省科技创新团队项目(批准号: 2009R50010)资助.

Preparation and the Third-order Optical Nonlinearities of the Sodium Borosilicate Glass Doped with Cu7.2S4 Quantum Dots

ZHAO Hai-Jun1, XIANG Wei-Dong1,2, ZHONG Jia-Song2, YANG Xin-Yu1, GUO Yu-Qing2, LIANG Xiao-Juan1, HUANG Hai-Yu1, LUO Hong-Yan1, ZHAO Xiu-Li1, CHEN Zhao-Ping1   

  1. 1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China;
    2. College of Materials Science and Engineering, Tongji University, Shanghai 200092, China
  • Received:2011-11-30 Online:2012-08-10 Published:2012-08-10

摘要: 利用溶胶-凝胶法结合气氛控制合成了含Cu7.2S4量子点的玻璃. 通过热重-差热分析仪对干凝胶样品的热分解机制进行了分析, 并利用X射线粉末衍射仪、 X射线光电子能谱、 透射电子显微镜、 X射线能量色散谱)、 高分辨透射电子显微镜及选区电子衍射对 Cu7.2S4量子点在玻璃中的微结构进行了表征, 利用飞秒Z扫描技术研究了材料在800 nm的三阶非线性光学性质. 结果表明, 尺寸在9~21 nm之间的Cu7.2S4纳米晶已经在玻璃中形成, 该玻璃展示出了优异的三阶非线性光学性能, 其三阶非线性光学折射率(γ)、 三阶非线性吸收系数(β)和三阶非线性极化率[X(3)]分别为1.11×10-15 m2/W, 8.91×10-9 m/W和9.56×10-18 m2/V2.

关键词: Cu7.2S4量子点玻璃, 溶胶-凝胶法, 微结构, 飞秒Z扫描技术

Abstract: Cu7.2S4 quantum dots glass was synthesized by both sol-gel and atmosphere control methods. The mechanism thermal decomposition of the stiff gel was studied by means of thermogravimetry-differential thermal analysis. The microstructures of Cu7.2S4 quantum dots in the glass were characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, energy dispersion X-ray spectra, high-resolution transmission electron microscopy, and selected-area electron diffraction. Meanwhile, the third-order nonlinear optical properties of the glass were measured in detail by the femtosecond Z-scan technique at a wavelength of 800 nm. The results show that Cu7.2S4 quantum dots have been formed in the glass, and the sizes of these Cu7.2S4 quantum dots having the tetragonal crystalline structure ranged from 9 nm to 21 nm, moreover, the glass exhibits the excellent third-order nonlinear optical properties, and the third-order nonlinear optical refractive index(γ), absorption coefficient(β) and susceptibility [X(3)] of the glass are determined to be 1.11×10-15 m2/W, 8.91×10-9 m/W, and 9.56×10-18 m2/V2, respectively. Because of so excellent third-order nonlinear optical properties of the glass doped with Cu7.2S4 quantum dots imply that the kind of material will be widely applied in nonlinear optical devices.

Key words: Cu7.2S4 quantum dots glass, Sol-gel method, Microstructure, Femtosecond Z-scan technique

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