不同衬底下激光后处理对结构色呈色性能影响研究  

Influence of Laser Post-Treatment on Spectral Properties of Structural Color Coatings with Different Substrates

作　　者：任昱晨 胡晓雪 黄敏[1] 刘瑜[1] 李修[1] Ren Yuchen;Hu Xiaoxue;Huang Min;Liu Yu;Li Xiu(School of Printing and Packaging Engineering,Beijing Institute of Graphic Communication,Beijing 102600,China)

机构地区：[1]北京印刷学院印刷与包装工程学院,北京102600

出　　处：《光学学报》2023年第13期177-184,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61805018);北京印刷学院轻工技术与工程学科建设(21090122016);北京印刷学院科研创新团队(BIGC Ec202302)。

摘　　要：为使人工制备的结构色实现色调精确调控制备以及更高的饱和度,分别以硅片和带有275 nm厚二氧化硅层的硅片为衬底,采用自组装法制备平面六角密堆积结构二维有序模板,通过磁控溅射方法在其上沉积不同厚度的金薄层(沉积时间为20 s、80 s和120 s),再利用532 nm脉冲激光后处理的方式,研究不同衬底及激光后处理过程对结构色薄膜呈色性能的影响。结果表明:镀膜时间相同,激光扫描速度减小,反射光谱中心波长发生蓝移;扫描速度相同,镀膜时间增加,在较低扫描速度下,中心波长先发生蓝移,再向长波方向发生红移,增大激光扫描速度时,样品反射光谱峰位整体出现轻微的蓝移趋势;此外,衬底添加二氧化硅层后,其他参数不变的情况下,样品除色调发生明显改变外,其颜色饱和度也得到明显提高。Objective With the continuous development of science and technology,it is of scientific significance to construct a structural color with a special color effect and good stability based on the nanostructure.At present,various artificially prepared structural color tuning methods are put forward,such as traditional nanoimprint lithography,ultrafast laser direct writing,microfluidics,and inkjet printing.Although it is possible to produce nanostructures with good periodicity and various patterns,the cost and complexity of the process also restrict the development of technology.To this end,twodimensional ordered templates with planar hexagonal close-packed structures are prepared by the gas-liquid interface assembly method on silicon wafers,and silicon wafers with a certain thickness of SiO_(2) in our study,and metal thin films with different thicknesses are prepared by the magnetron sputtering method.Then the deformation degree of the periodic surface is changed by post-treatment of 532 nm pulse laser to realize the modulation of structural color samples.Color modulation is carried out by regulating the changes in microstructure morphology.Methods The fabrication process of the periodic polystyrene(PS)microsphere substrate is divided into two steps.First,a polymer sphere monolayer is assembled at the gas-liquid interface and then transferred to the Si/SiO_(2) substrate.Second,the Au films with different thicknesses are deposited on the above-mentioned PS colloidal crystal template by a radio frequency(RF)magnetron sputtering technique.Then a 532 nm pulsed solid-state laser system(EP10-1,Changchun New Industries Optoelectronics Technology Co.,Ltd.,)is employed to post-treatment the ordered surface with metal-coated colloidal crystal by changing different scanning speeds.The laser system generates a train of 5 ns laser pulses at a repetition rate of 1 kHz.The laser beam is focused by a convex lens with a focal length of 160 mm,and the diameter of the focused laser beam is about 180μm at the focal plane.By adopting su

关 键 词：激光后处理 结构色 颜色调控 饱和度 SiO_(2)层 

分 类 号：O436[机械工程—光学工程]