High repetition rate femtosecond laser irradiation-induced elements redistribution in Ag-doped glass
High repetition rate femtosecond laser irradiation-induced elements redistribution in Ag-doped glass
复制标题
高重复率飞秒激光辐照诱导的掺银玻璃中的元素重新分布
DOI：
10.1007/s00340-010-4330-1
复制
发表时间：
2011-06-01
影响因子：
2.1
通讯作者：
Ma, G.
中科院分区：
文献类型：
--
作者：
Dai, Y.;Yu, G.;Ma, G.
利用250 kHz飞秒激光诱导银纳米粒子一步沉淀，同时在掺银玻璃中实现元素的再分布。飞秒激光曝光后，形成了一个环形区域。此外，由于光学球差效应，沿入射方向的激光强度分布不均匀，导致大部分形成的银纳米粒子在该结构横截面的下部析出。EPMA分析表明，在环形区域的中心和边界，Ag元素的相对浓度都很高。这些银纳米粒子可能会增加其沉淀区的折射率。我们认为，高重复频率飞秒激光辐照引起的离子再分布和银纳米粒子的析出应归因于高重复频率飞秒激光的热积累效应。
A 250 kHz femtosecond laser was used to induce a one-step precipitation of Ag nanoparticles and the simultaneous element redistribution in Ag ion doped glass. After femtosecond laser exposure, a ring-shape region was formed. Besides, as a result of an optical spherical aberration effect, a nonuniform laser intensity distribution along the incident direction caused most of the formed Ag nanoparticles to precipitate in the lower part of cross section of this structure. By an EPMA analysis, the relative concentration of the Ag element was both high in the center and in the boundary of the ring-shape region. These Ag nanoparticles could potentially increase the refractive index in their precipitation regions. We proposed that the induced ion redistribution and the precipitation of Ag nanoparticles should be due to the heat accumulation effect by the high repetition rate femtosecond laser irradiation.