二维金纳米阵列制备及其光学响应

发布时间：2018-07-24 13:29

【摘要】：有序贵金属纳米结构由于其本身所特有的光学响应及灵活调控能力,在微纳光电子材料与器件研究领域得到了广泛应用。在众多相关研究中,如何实现金(Au)纳米周期结构的大面积快速制备是人们关心的重要问题之一。采用纳米球自组装刻蚀方法,在大孔周期结构模板内部成功制备了新型二维Au纳米阵列,并有效避免了杂散Au纳米颗粒的产生。通过进一步的工艺优化和参量控制,实现了Au纳米颗粒尺寸的灵活调控,并探讨了其结构形成的物理机理。光学测试研究结果揭示了二维Au纳米阵列的表面等离子体吸收与散射响应,并证明其在近红外飞秒脉冲激励下具有显著的双光子吸收(饱和)效应。该研究结果在太阳能电池,光开关及材料微纳制备等领域具有潜在应用。
[Abstract]:The ordered noble metal nanostructures have been widely used in the research of micro-nano optoelectronic materials and devices due to their unique optical response and flexible control ability. Among the many related studies, how to realize the rapid preparation of gold (Au) nanostructures in large area is one of the most important issues concerned by people. A novel two-dimensional au nanoarray was successfully fabricated by self-assembly etching of nanospheres in a macroporous periodic structure template, and the formation of stray au nanoparticles was effectively avoided. Through further process optimization and parameter control, the flexible control of au nanoparticles size was realized, and the physical mechanism of the formation of au nanoparticles was discussed. The results of optical measurements reveal the surface plasma absorption and scattering response of 2-D au nanoarrays, and prove that they have a significant two-photon absorption (saturation) effect under the excitation of near-infrared femtosecond pulses. The results have potential applications in solar cells, optical switches and materials fabrication.
【作者单位】：中国科学院上海光学精密机械研究所中国科学院强激光材料重点实验室;中国科学院大学;爱尔兰都柏林圣三一学院物理系;
【基金】：国家自然科学基金(61405224) 上海市自然科学基金(14ZR1445000)
【分类号】：O614.123;TB383.1

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