Sb量子点掺杂钠硼硅玻璃的三阶光学非线性  

Third-Order Nonlinearity of Sb Quantum Dots Doped Na_2O-B_2O_3-SiO_2 Glass

作　　者：马新[1] 向卫东[1] 钟家松[2] 张成龙[1] 裴浪[1] 梁晓娟[1] 

机构地区：[1]温州大学化学与材料工程学院,浙江温州325035 [2]杭州电子科技大学材料与环境工程学院,浙江杭州310018

出　　处：《光学学报》2014年第10期214-220,共7页Acta Optica Sinica

基　　金：国家自然科学基金(51172165;51272059);浙江省科技创新团队(2009R50010);浙江省自然科学基金(LQ14E020006)

摘　　要：采用溶胶-凝胶法以正硅酸乙酯、硼酸、金属钠为前驱体合成了含Sb量子点的钠硼硅玻璃。紫外-可见（UV-vis）吸收光谱分析表明量子点玻璃的表面等离子体共振吸收峰在566nm附近;利用飞秒激光钛宝石Z-扫描（Z-scan）技术在800nm波长处对玻璃样品的非线性光学性质进行研究,得到了该玻璃的非线性折射率γ,非线性吸收系数β和三阶非线性极化率χ（3）分别为8.59×10-17 m2/W、1.80×10-10 m/W、4.75×10-11 esu;X-射线粉末衍射（XRD）分析表明具有斜方六面体晶相结构的Sb量子点成功的掺入到玻璃基体中;通过透射电子显微镜（TEM）和高分辨透射电子显微镜（HRTEM）对量子点的尺寸大小和颗粒分布进行了表征,结果显示Sb量子点在玻璃中呈规则的球形,并且颗粒尺寸在19~25nm之间。Antimony （Sb） quantum dots doped in sodium borosilicate glass are synthesized through sol-gel method using tetraethyl orthosilicate（TEOS）, boracic acid, and metallic sodium as precursors. Ultraviolet-visible （UV-vis） absorption spectrometer shows that the surface plasma resonance absorption peak of the quantum dots glass is about 566 nm. Nonlinear optical properties of Sb quantum dots doped glass are investigated by using Z-scan technique at the wavelength of 800 nm with femtosecond Ti： sapphire laser radiation. The values of nonlinear refraction index γ, nonlinear absorption coefficient β and the third-order nonlinear optical susceptibility x（3） of the glass are estimated to be 8.59 × 10^-17 m2/W, 1.80 × 10^-10 m/W, 4.75 × 10^-11 esu, respectively. X-ray powder diffraction （XRD） analyses reveal that Sb quantum dots with rhombic hexahedron phase are successfully doped in glass substrate. The size and distribution of the quantum dots are measured by transmission electron microscopy （TEM） as well as high-resolution transmission electron microscopy （HRTEM）, the results show that spherical shape have formed uniformly in the glass, and the size of these quantum dots rang from 19 to 25 nm.

关 键 词：非线性光学 玻璃 Sb量子点 三阶非线性 钠硼硅 

分 类 号：O437[机械工程—光学工程]