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首页> 外文期刊>Science of advanced materials >Laser-Ablation Synthesis and Evaluation of Thermal Non-Linear Optical Properties of Silver Nanoparticles in Monoolein
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Laser-Ablation Synthesis and Evaluation of Thermal Non-Linear Optical Properties of Silver Nanoparticles in Monoolein

机译：单油精中银纳米粒子的激光烧蚀合成及热非线性光学性质评估

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摘要

Silver nanoparticles were prepared in monoolein, a glycerol derivative of oleic acid, via pulsed laser ablation of a silver plate with a Q-Switched Nd:YAG laser (1064 nm). The average size of the nanoparticles was 8.8 ±0.5 nm, with a narrow size distribution of 4.6 nm FWHM. No significant agglomeration or flocculation was observed after one-month storage. The observed results indicated a nonlinear dependence of the refractive index n_2 on the particle volume fraction. Furthermore, the monoolein-silver nanoparticle solution showed self-defocusing behaviour, as deduced from the negative sign in n_2 and spatial self-phase modulation, which depended on the volume fraction. Non-linear absorption behaviour was not observed in any of the samples analyzed. The results in this work suggest that colloidal silver nanoparticle solutions in monoolein are interesting nonlinear materials to create and control different spatial effects and that such silver-monoolein colloids might be used in a multitude of optical applications, such as spatial soliton propagation, real time holography, and liquid crystal-based applications.
机译：通过用Q开关Nd：YAG激光（1064 nm）对银板进行脉冲激光烧蚀，在单油精（一种油酸的甘油衍生物）中制备了银纳米颗粒。纳米粒子的平均尺寸为8.8±0.5 nm，FWHM的窄尺寸分布为4.6 nm。储存一个月后未观察到明显的团聚或絮凝。观察到的结果表明折射率n_2对颗粒体积分数的非线性依赖性。此外，单油精-银纳米颗粒溶液表现出自散焦行为，这是由n_2中的负号和空间自相位调制所决定的，这取决于体积分数。在所分析的任何样品中均未观察到非线性吸收行为。这项工作的结果表明，单油精中的胶体银纳米颗粒溶液是有趣的非线性材料，可创建和控制不同的空间效应，并且这种银单油精胶体可用于多种光学应用中，例如空间孤子传播，实时全息照相，以及基于液晶的应用。

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