Bi_2O_3纳米晶玻璃三阶非线性光吸收性质的研究  

Study on the Third-order Optical Nonlinear Absorption Properties of Bi_2O_3 Nanocrystals Glass

作　　者：杨昕宇[1,2] 向卫东[1,2] 张希艳[2] 刘海涛[1] 赵海军[1] 梁晓娟[1] 

机构地区：[1]温州大学化学与材料工程学院,温州325035 [2]长春理工大学材料科学与工程学院,长春130022

出　　处：《无机材料学报》2012年第3期317-322,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(50772075;50972107);浙江省自然科学基金(Y4100233);浙江省科技创新团队项目(2009R50010)~~

摘　　要：利用溶胶凝胶法结合气氛控制方式合成了含Bi2O3纳米晶钠硼硅玻璃.利用X射线粉末衍射仪（XRD）、X射线光电子能谱（XPS）、透射电子显微镜（TEM）、X射线能量色散谱（EDX）、扫描模式透射电子显微镜（STEM）、高分辨透射电子显微镜（HRTEM）以及选区电子衍射（SAED）对掺杂在钠硼硅玻璃中Bi2O3纳米晶的形貌和微结构进行了表征,同时,利用飞秒开孔Z-scan技术详细地研究了Bi2O3纳米晶玻璃在800 nm处不同激发光强度下的三阶非线性光吸收性质.结果表明,在钠硼硅玻璃中形成了尺寸小于10 nm的Bi2O3单斜晶系纳米晶.随着激发光强度的增强,该玻璃的三阶非线性光吸收性质产生由饱和吸收向反饱和吸收的转变.进一步,计算得到的该玻璃三阶非线性极化率χ（3）的数量级范围在10-19-10-18m2/V2之间.这一结果说明该玻璃具有良好的非线性光学性能,并且在光限幅器等非线性光学领域具有潜在的应用价值.The sodium borosilicate glass containing Bi 2 O 3 nanocrystals was synthesized by employing both Sol-Gel and atmosphere control methods.Morphology and microstructure of the Bi 2 O 3 nanocrystals doped in the sodium borosilicate glass were characterized by means of X-ray powder diffraction（XRD）,X-ray photoelectron spectroscope（XPS）,transmission electron microscope（TEM）,energy dispersion X-ray spectra（EDX）,scanning transmission electron microscope（STEM）,high-resolution transmission electron microscope（HRTEM）,and selected-area electron diffraction（SAED）.Meanwhile,the third-order nonlinear optical absorption properties of the Bi 2 O 3 nanocrystals glass were investigated by means of the femtosecond open-aperture Z-scan technique under the different excited light intensities at a wavelength of 800 nm.The results show that the Bi 2 O 3 nanocrystals are formed in the sodium borosilicate glass matrix,with dimension less than 10 nm.Moreover,the transformation from saturable absorption to reverse saturable absorption will occur with the increase of the excited light intensities in the glass.Furthermore,the calculated magnitude of the third-order nonlinear susceptibility χ（3） ranges from 10-19 to 10-18 m 2 /V 2 in the glass.The results indicate that the glass exhibits the excellent nonlinear optical properties,which have potential application in the field of nonlinear optics such as optical limiters,etc.

关 键 词：Bi2O3纳米晶 钠硼硅玻璃 溶胶凝胶 三阶非线性光吸收性质 

分 类 号：TQ174[化学工程—陶瓷工业]