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One-step direct-laser metal writing of sub-100 nm 3D silver nanostructures in a gelatin matrix

机译：明胶基质中亚100 nm 3D银纳米结构的一步式直接激光金属写入

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摘要

Developing an ability to fabricate high-resolution, 3D metal nanostructures in a stretchable 3D matrix is a critical step to realizing novel optoelectronic devices such as tunable bulk metal-dielectric optical devices and THz metamaterial devices that are not feasible with alternative techniques. We report a new chemistry method to fabricate high-resolution, 3D silver nanostructures using a femtosecond-laser direct metal writing technique. Previously, only fabrication of 3D polymeric structures or single-/few-layer metal structures was possible. Our method takes advantage of unique gelatin properties to overcome such previous limitations as limited freedom in 3D material design and short sample lifetime. We fabricate more than 15 layers of 3D silver nanostructures with a resolution of less than 100 nm in a stable dielectric matrix that is flexible and has high large transparency that is well-matched for potential applications in the optical and THz metamaterial regimes. This is a single-step process that does not require any further processing. This work will be of interest to those interested in fabrication methods that utilize nonlinear light-matter interactions and the realization of future metamaterials.
机译：开发在可拉伸3D矩阵中制造高分辨率3D金属纳米结构的能力是实现新型光电器件（例如可调谐体金属介电光学器件和THz超材料器件）的关键步骤，而替代技术则不可行。我们报告了一种新的化学方法，以使用飞秒激光直接金属写入技术制造高分辨率的3D银纳米结构。以前，仅可以制造3D聚合物结构或单层/很少层金属结构。我们的方法利用独特的明胶特性来克服以前的局限性，例如3D材料设计中的自由度有限和样品寿命短。我们在一个稳定的介电基质中制造了15层以上的3D银纳米结构，其分辨率小于100 nm，该介电基质具有柔韧性和高透明度，非常适合光学和太赫兹超材料领域的潜在应用。这是一个单步过程，不需要任何进一步的处理。那些对利用非线性光物质相互作用的制造方法以及未来超材料的实现感兴趣的人将对这项工作感兴趣。

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