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聚焦的近红外飞秒激光在纯石英玻璃中诱导产生Si E‘心,在宏观破坏前,色心含量随激光功率密度、辐照脉冲数呈线性关系增长.通过飞秒激光辐照前后石英玻璃的吸收光谱、电子自旋共振谱、荧光谱分析,提出了超短脉冲激光作用下Si E’心的形成过程,并认为激子自陷是色心形成的主要原因。 相似文献
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用溶胶-凝胶工艺,将有机染料DQTCI’引入到以正硅酸乙酯和有机改性硅酸盐KH560-KH500凝胶体系基质中,通过对孔结构,吸收光谱光及荧光光谱的分析,发现基质对有机染料的发光性能有较大的影响。 相似文献
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Large size self-sustained film with considerable thickness ranging from 30 to 500 μm was prepared with sol-gel method by using dimethyldiethoxysilane/tetraethoxysilane composite alkoxide as precursor. The film exhibits good plasticity as well. Various factors that may influence the film properties were investigated. IR and AFM techniques were adopted to study the film structure and surface morphology. Gas chromatogram/mass spectrum technique was also adopted to characterize the network structure of the material through identification of different polymers formed during hydrolysis and condensation course. 相似文献
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透明玻璃内部金纳米颗粒的空间选择性析出控制 总被引:3,自引:1,他引:2
使用飞秒激光或X射线辐照和热处理相结合 ,在掺杂金离子的玻璃中成功诱导出金纳米颗粒。样品经飞秒激光或X射线辐照后产生暗化 ,高温热处理后显示不同深浅的红色。通过吸收光谱和透射电镜测试研究了激光和X射线辐照对诱导金纳米颗粒析出的影响。实验结果表明 :飞秒激光或X射线辐照可以使玻璃内部金纳米颗粒析出的热处理温度降低 3 0℃和减小显色尺寸近 10nm。通过激光和X射线辐照 ,结合热处理可以在一块玻璃样品上实现多色显示。 相似文献