直接在超硬金属玻璃上实现近场调控超快激光超波长结构。

IF 27.4 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Advanced Materials Pub Date : 2024-08-22 DOI:10.1002/adma.202405766
Hanxuan Huang, Shijie Song, Yun Liu, Zhenyu Liu, Zifeng Xiao, Yanyang Li, Yi Wang, Ruifan Li, Qianru Zhao, Xudong Wang, Yu Chen, Lei Wang, Zhishan Hou, Peilei Zhang, Yun-Lu Sun
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引用次数: 0

摘要

超快激光与物质的相互作用实现了 "自上而下 "的激光表面结构化,特别是对于难以加工的材料,具有 "自下而上 "的自组织特征。通过应用正/负反馈,激光诱导结构化的亚波长方案在缺陷和长程有序方面得到了改善。对于与复杂的热/流体动力学更为相关的超波长激光结构化,目前还鲜有报道。本文首次在超硬金属玻璃上直接开发了近场调控超快激光光刻自阵列超波长微孔/纳米孔。预结构上的等离子体热点作为正反馈,箝位了横向几何形状(即位置和尺寸)。同时,作为负反馈,在特定飞秒激光照射下,通过光动力等离子体烧蚀和马兰戈尼去除限制,钻孔并自组织成微/纳米孔阵列。研究了激光与物质相互作用过程中的多物理传导(基于双温模型)、远场/近场耦合以及偏振依赖性的机理和有限元建模。大面积微孔/纳米孔阵列(厘米级或更大)是用可调谐的周期(1-5 µm)和几何形状(例如,分别使用 343、515 和 1030 激光器,直径为 500 nm-6 µm)制造的。因此,2.5-6.5 微米的中/远红外反射率从≈80% 下降到≈5%。多物理耦合和近场增强的普遍性使这种方法在各种应用中具有广泛的适用性,甚至是不可替代性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Near-Field-Regulated Ultrafast Laser Supra-Wavelength Structuring Directly on Ultrahard Metallic Glasses

The ultrafast-laser-matter interactions enable “top-down” laser surface structuring, especially for materials difficult to process, with “bottom-up” self-organizing features. The subwavelength scenarios of laser-induced structuring are improved in defects and long-range order by applying positive/negative feedbacks. It is still hardly reported for supra-wavelength laser structuring more associated with complicated thermo/hydro-dynamics. For the first time to the knowledge, the near-field-regulated ultrafast-laser lithography of self-arrayed supra-wavelength micro/nano-pores directly on ultra-hard metallic glass is developed here. The plasmonic hot spots on pre-structures, as the positive feedback, clamped the lateral geometries (i.e., position, size). Simultaneously, it drilled and self-organized into micro/nano-pore arrays by photo-dynamic plasma ablation and Marangoni removal confined under specific femtosecond-laser irradiation, as the negative feedback. The mechanisms and finite element modeling of the multi-physical transduction (based on the two-temperature model), the far-field/near-field coupling, and the polarization dependence during laser-matter interactions are studied. Large-area micro/nano-pore arrays (centimeter scale or larger)  are manufactured with tunable periods (1–5 µm) and geometries (e.g., diameters of 500 nm–6 µm using 343, 515, and 1030 lasers, respectively). Consequently, the mid/far-infrared reflectivity at 2.5–6.5 µm iss decreased from ≈80% to ≈5%. The universality of multi-physical coupling and near-field enhancements makes this approach widely applicable, or even irreplaceable, in various applications.

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来源期刊
Advanced Materials
Advanced Materials 工程技术-材料科学:综合
CiteScore
43.00
自引率
4.10%
发文量
2182
审稿时长
2 months
期刊介绍: Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.
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