Rapid, continuous projection multi-photon 3D printing enabled by spatiotemporal focusing of femtosecond pulses.
Rapid, continuous projection multi-photon 3D printing enabled by spatiotemporal focusing of femtosecond pulses.
复制标题
通过飞秒脉冲的时空聚焦实现快速、连续投影多光子3D打印
DOI：
10.1038/s41377-021-00645-z
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发表时间：
2021-09-24
期刊：
影响因子：
--
通讯作者：
Xu X
中科院分区：
文献类型：
--
作者：
Somers P;Liang Z;Johnson JE;Boudouris BW;Pan L;Xu X
需要扩大3D打印产量，特别是对于提供不同领域所需的亚微米结构化能力的多光子3D打印工艺。在这项工作中，高速投影多光子打印与时空聚焦相结合，以快速，逐层和连续的方式制造3D结构。时空聚焦将印刷限制在薄层上，从而实现微米和亚微米尺度上的印刷厚度。通过在图案之间没有停顿的情况下动态变化的图案的投影，建立了连续的制造过程。文中还提出了一个计算时空聚焦和成像的数值模型，并用光学成像和打印结果进行了验证。制造具有光滑特征的复杂3D结构，以10 − 3 mm3 s − 1以上的速率实现毫米级打印。这种方法是进一步可扩展的，表明其潜力，使制造的三维结构与微米/纳米级的功能，在一个实际的时间尺度成为现实。超快激光脉冲的时空聚焦使薄印刷层能够用于投影多光子光刻。复杂的3D微结构以高打印速率连续打印。
There is demand for scaling up 3D printing throughput, especially for the multi-photon 3D printing process that provides sub-micrometer structuring capabilities required in diverse fields. In this work, high-speed projection multi-photon printing is combined with spatiotemporal focusing for fabrication of 3D structures in a rapid, layer-by-layer, and continuous manner. Spatiotemporal focusing confines printing to thin layers, thereby achieving print thicknesses on the micron and sub-micron scale. Through projection of dynamically varying patterns with no pause between patterns, a continuous fabrication process is established. A numerical model for computing spatiotemporal focusing and imaging is also presented which is verified by optical imaging and printing results. Complex 3D structures with smooth features are fabricated, with millimeter scale printing realized at a rate above 10−3 mm3 s−1. This method is further scalable, indicating its potential to make fabrications of 3D structures with micro/nanoscale features in a practical time scale a reality. Spatiotemporal focusing of ultrafast laser pulses enable thin print layers for projection multiphoton lithography. Complex 3D microstructures are printed in a continuous manner at high print rates.
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