Nishiyama Hiroaki, Umetsu Kan, Kimura Kaito
Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa, Yamagata, Japan.
Sci Rep. 2019 Oct 4;9(1):14310. doi: 10.1038/s41598-019-50630-1.
Versatile direct laser writing (DLW), not limited by material photosensitivity, offers opportunities for fundamental and technological innovation for micro-/nanofabrication in integrated photonics, electronics and material science. Although DLW has high potential in micro-/nanodevice fabrication, material choice suffers an intrinsic limitation: DLW cannot be applied to non-photosensitive materials. We describe a newly discovered rapid-assembly phenomenon of fine particles based on femtosecond laser multi-photon-reduction in solution. This phenomenon allowed the writing of micropatterns with thick clad layers filled with nanoparticles. We wrote continuous patterns by moving the laser focus even in the case of non-photosensitive material such as SiO. By transcending the strict material limitation, this novel laser writing process promises to be a powerful tool in a variety of scientific fields.
通用的直接激光写入（DLW）不受材料光敏性的限制，为集成光子学、电子学和材料科学中的微/纳米制造提供了基础和技术创新的机会。尽管DLW在微/纳米器件制造方面具有很高的潜力，但材料选择存在固有局限性：DLW不能应用于非光敏材料。我们描述了一种新发现的基于飞秒激光在溶液中的多光子还原的细颗粒快速组装现象。这种现象使得能够写入填充有纳米颗粒的厚包层的微图案。即使在诸如SiO等非光敏材料的情况下，我们也通过移动激光焦点来写入连续图案。通过超越严格的材料限制，这种新颖的激光写入工艺有望成为各种科学领域中的强大工具。
