二维金纳米阵列制备及其光学响应

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。

Fabrication and optical responses of 2D Au nano array

Ordered noble metal nanostructured arrays have attracted much attention due to their unique optical properties and flexible tuning abilities, which have shown promising applications in variety of micro/nano optoelectronic devices. Among the numerous research works, fast fabrication of Au periodic nanostructures in large area is still one of the most popular issues. In this work, nanosphere self- assembling lithography techniques was employed for the fabrication of novel 2D Au nanostructure arrays with controlled Au particle sizes based on the monolayer periodic macroporous template. Moreover, the physical mechanism of the Au nanostructure formation was discussed in detail. The optical properties were investigated and the results clearly revealed the surface plasmon scattering and absorption properties of the Au nano array. Moreover, it was demonstrated with a remarkable two-photon absorption saturation effect for the 1 030 nm femtosecond pulses. The results imply the great potential of the Au nano arrays in many applications such as solar cell, optical switch and nano fabrication areas.