利用飞秒laser曝光进行功能材料的添加和减去制造：设计3D磁性纳米结构的途径
Exploiting femtosecond laser exposure for additive and subtractive fabrication of functional materials: A Route to designer 3D Magnetic Nanostructures
摘要：
三维纳米结构的功能材料是重要的系统，允许新的手段来复杂地控制电磁特性。一个关键问题是在纳米级上实现3D打印方法，可以产生一系列功能材料。在这封信中，它表明，双光子光刻结合飞秒加工的牺牲层，可以用来实现这样的愿景，并产生复杂的几何形状的三维功能纳米材料。这是证明通过制造三维磁性纳米线，表现出受控的畴壁注入和传播。其次，我们制作了大规模的三维人工自旋冰结构，其复杂的开关可以使用光磁探测。我们表明，通过仔细分析的磁光克尔效应信号，并通过与微磁模拟比较，深度相关的开关信息可以从3DASI晶格。这项工作为新材料铺平了道路，新材料利用了非平凡的3D几何形状提供的额外物理学。
英文摘要：
Three-dimensional nanostructured functional materials are important systems, allowing new means to intricately control electromagnetic properties. A key problem is realising a 3D printing methodology upon the nanoscale that can yield a range of functional materials. In this letter, it is shown that two-photon lithography when combined with femtosecond machining of sacrificial layers, can be used to realise such a vision and produce 3D functional nanomaterials of complex geometry. This is demonstrated by fabricating 3D magnetic nanowires that exhibit controlled domain wall injection and propagation. Secondly, we fabricate large scale 3D artificial spin-ice structures whose complex switching can be probed using optical magnetometry. We show that by careful analysis of the magneto-optical Kerr effect signal and by comparison with micro-magnetic simulations, depth dependent switching information can be obtained from the 3DASI lattice. The work paves the way to new materials, which exploit additional physics provided by non-trivial 3D geometries.
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