Laser Fabrication of Nanoholes on Silica through Surface Window Assisted Nano-Drilling (SWAN)

作者：Yu Lu, Lin Kai, Qing Yang, Guangqing Du, Xun Hou, Feng Chen · 发表于：Nanomaterials · 年份：2021 · DOI：10.3390/nano11123340 · 被引用次数：12 · 研究领域：Laser Material Processing Techniques、Advanced Surface Polishing Techniques、Photonic and Optical Devices

Nano-structures have significant applications in many fields such as chip fabrications, nanorobotics, and solar cells. However, realizing nanoscale structures on hard and brittle materials is still challenging. In this paper, when processing the silica surface with a tightly focused Bessel beam, the smallest nanohole with ~20 nm diameter has been realized by precisely controlling the interior and superficial interaction of the silica material. An effective surface window assisted nano-drilling (SWAN) mechanism is proposed to explain the generation of such a deep subwavelength structure, which is supported by the simulation results of energy depositions.