【摘要】 利用单光束 Z扫描技术 ,在波长为 1 .0 64μm、脉宽为 38ps条件下测定了不同热处理条件下表面包覆纳米 Bi2 S3 掺杂有机改性硅酸盐材料的三阶光学非线性。结果发现室温下自然干燥的样品和在 N2 气氛下 1 50℃加热处理 2小时后的样品的三阶光学非线性极化系数分别为5.8× 1 0 -1 3 esu和 3.7× 1 0 -1 2 esu。后者的三阶光学非线性极化系数比前者几乎大一个数量级。显然 ,适当的热处理能增强样品的三阶光学非线性。对此现象进行了分析和讨论。更多还原

【Abstract】 The third order optical nonlinear susceptibilities χ (3)  of coated Bi 2S 3 nanoparticles doped organically modified sol gels under different thermal treatment conditions have been measured using the Z scan technique with 38 ps pulse excitation at 1.064 μm. The χ (3)  for the sample dried at room temperature is 5.8×10 -13 esu, and for the sample heated at 150℃ for 2 h in a nitrogen atmosphere is 3.7×10 -12 esu. It is clear that the χ (3)  of the latter is larger than that of the former. Mechanism for the effects is discussed.更多还原