Design and fabrication of dual-scale broadband antireflective structures on metal surfaces by using nanosecond and femtosecond lasers
Lou, Rui2,3,4; Zhang, Guodong1; Li, Guangying2; Li, Xuelong1; Liu, Qing5; Cheng, Guanghua1
刊名Micromachines
2020
卷号11期号:1
关键词antireflective surfaces nanosecond laser femtosecond laser micro-nano hybrid structures broadband spectrum
ISSN号2072666X
DOI10.3390/mi11010020
产权排序1
英文摘要

Antireflective surfaces, with their great potential applications, have attracted tremendous attention and have been the subject of extensive research in recent years. However, due to the significant optical impedance mismatch between a metal surface and free space, it is still a challenging issue to realize ultralow reflectance on a metal surface. To address this issue, we propose a two-step strategy for constructing antireflective structures on a Ti-6Al-4V (TC4) surface using nanosecond and femtosecond pulsed lasers in combination. By controlling the parameters of the nanosecond laser, microgrooves are first scratched on the TC4 surface to reduce the interface reflection. Then, the femtosecond laser is focused onto the sample surface with orthogonal scanning to induce deep air holes and nanoscale structures, which eectively enhances the broadband absorption. The antireflection mechanism of the dual-scale structures is discussed regarding morphological characterization and hemispherical reflectance measurements. Finally, the modified sample surface covered with micro-nano hybrid structures is characterized by an average reflectance of 3.1% over the wavelengths ranging from 250 nm to 2250 nm. © 2019 The Author(s).

语种英语
出版者MDPI AG, Postfach, Basel, CH-4005, Switzerland
WOS记录号WOS:000514309100020
内容类型期刊论文
源URL[http://ir.opt.ac.cn/handle/181661/93258]  
专题西安光学精密机械研究所_瞬态光学技术国家重点实验室
通讯作者Cheng, Guanghua
作者单位1.Electronic Information College, Center of Optical Imagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an, Shaanxi; 710072, China;
2.State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China;
3.University of Chinese Academy of Sciences, Beijing; 100049, China;
4.School of Future Technology, University of Chinese Academy of Sciences, Beijing; 100049, China;
5.Zhejiang Wanli University, Ningbo; 315100, China
推荐引用方式
GB/T 7714
Lou, Rui,Zhang, Guodong,Li, Guangying,et al. Design and fabrication of dual-scale broadband antireflective structures on metal surfaces by using nanosecond and femtosecond lasers[J]. Micromachines,2020,11(1).
APA Lou, Rui,Zhang, Guodong,Li, Guangying,Li, Xuelong,Liu, Qing,&Cheng, Guanghua.(2020).Design and fabrication of dual-scale broadband antireflective structures on metal surfaces by using nanosecond and femtosecond lasers.Micromachines,11(1).
MLA Lou, Rui,et al."Design and fabrication of dual-scale broadband antireflective structures on metal surfaces by using nanosecond and femtosecond lasers".Micromachines 11.1(2020).
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