基于飞秒激光时空聚焦技术的三维微纳加工

Three-Dimensional Micro-and Nano-Machining Based on Spatiotemporal Focusing Technique of Femtosecond Laser

介绍飞秒激光时空聚焦技术的基本原理,回顾了该技术在改善飞秒激光加工的分辨率、抑制加工过程中的非线性效应以及提高材料加工质量等方面的应用。重点讨论了脉冲前沿倾斜(PFT)、光强平面倾斜等时空聚焦飞秒激光脉冲的独特光场特性及其对材料加工产生的影响。介绍了时空聚焦技术在强场物理领域中的应用,并对该技术的适用范围进行了讨论。最后对该技术的特点和应用进行总结,并指明了未来的研究方向。

The fundamental principle of spatiotemporal focusing technique of femtosecond laser is introduced in this paper, and applications of this technique on improving the resolution of femtosecond laser fabrication, suppressing the nonlinear effect of the fabricating process, and improving the materials fabrication quality are reviewed. Discussion is emphasized on the unique optical field characteristics of spatiotemporally focused femtosecond laser pulses including pulse front tilt （PFT） and intensity plane tilt, and their influence on material processing. Moreover, the applications of spatiotemporal focusing technique on high field physics and its scope of applications are introduced. Lastly, we summarize the principles and applications of spatiotemporal focusing technique, and suggest several directions for the future research.