Large-area straight, regular periodic surface structures produced on fused silica by the interference of two femtosecond laser beams through cylindrical lens

• DOI: 10.29026/oea.2021.200036
• Publication Date: 2021-12-30T21:08:11Z
• Authors: Long Chen; ; Kaiqiang Cao; Yanli Li; Jukun Liu; Shian Zhang; Donghai Feng; Zhenrong Sun; Tianqing Jia
• Keywords: fused silica; laser-induced periodic surface structures; structural coloring; QC350-467; Optics. Light; two-beam interference; cylindrical lens

Inhomogeneity and low efficiency are two important factors that limit the application of laser-induced periodic surface structures (LIPSSs), especially on glass surfaces. In this study, two-beam interference (TBI) of femtosecond lasers was used to produce large-area straight LIPSSs on fused silica using cylindrical lenses. Compared with those produced using a single circular or cylindrical lens, the LIPSSs produced by TBI are much straighter and more regular. Depending on the laser fluence and scanning velocity, LIPSSs with grating-like or spaced LIPSSs are produced on the fused silica surface. Their structural colors are blue, green, and red, and only green and red, respectively. Grating-like LIPSS patterns oriented in different directions are obtained and exhibit bright and vivid colors, indicating potential applications in surface coloring and anti-counterfeiting logos.