Third-order nonlinear optical vitreous material derived from mesoporous silica incorporated with Au nanoparticles
Third-order nonlinear optical vitreous material derived from mesoporous silica incorporated with Au nanoparticles
复制标题
DOI：
10.1039/c4tc00856a
复制
发表时间：
2014-08
影响因子：
6.4
通讯作者：
Xin Zhang;Wei Luo;Lianjun Wang;Wan Jiang
中科院分区：
文献类型：
--
作者：
Xin Zhang;Wei Luo;Lianjun Wang;Wan Jiang
通过放电等离子烧结来固结金纳米颗粒封装的介孔二氧化硅 SBA-15。事实证明，这是一种在石英玻璃中掺入金纳米颗粒的原始且简便的制备途径。尽管Au纳米颗粒的浓度极低（约0.05wt%），但由于Au纳米颗粒的表面等离子体共振效应，将Au纳米颗粒掺入石英玻璃基质中，使得所得玻璃呈深酒红色。此外，采用飞秒激光脉冲的Z扫描方法测量了这种介孔复合玻璃的非线性光学性能，该玻璃在720 nm处表现出自聚焦特性，具有饱和吸收。三阶非线性折射率n2和吸收系数β分别为1.74 × 10−18 m2 W−1和-5.72 × 10−12 m W−1。我们相信这种方法可以扩展到将其他金属或半导体纳米颗粒分散在玻璃基质中。
Mesoporous silica SBA-15 encapsulated with Au nanoparticles was consolidated by spark plasma sintering. It turned out to be an original and facile preparation route for incorporating Au nanoparticles in silica glass. The incorporation of Au nanoparticles in a silica glass matrix made the obtained glass coloured dark wine-red due to the surface plasmon resonance effect of Au nanoparticles, although the concentration of Au nanoparticles was extremely low (about 0.05 wt%). Besides, the Z-scan method using a femtosecond laser pulse was employed to measure the nonlinear optical property of this mesoporous composite-derived glass, which exhibited self-focusing feature at 720 nm with saturable absorption. The third-order nonlinear refraction index n2 and absorption coefficient β were 1.74 × 10−18 m2 W−1 and −5.72 × 10−12 m W−1, respectively. We believe that this approach could be extended to disperse other metal or semiconductor nanoparticles in a glass matrix.