17 May 2018 Fabrication of microstructures by rear-side picosecond laser irradiation of two-layer PMMA
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Micro-structures offer superior functions such as superhydrophobicity, selfcleaning, anti-wear and drag reduction. In this paper, various microstructures were fabricated by rear-side picosecond laser irradiation of two-layer materials. The material of underlying layer was commonly commercial available ink; the material of surface layer was PMMA. The high light absorptivity of underlying material result in significantly reduced absorption depth. The laser source could therefore be regarded as plane heat source, leading to better surface morphologies after the mater-laser interaction. The results showed that convex structures were obtained at a lower laser fluence; with increase of laser fluence, a doughnut-like structures were obtained; with further rise of laser fluence, bowl-like structures would be obtained. Moreover, the size of microstructures could be tuned by adjusting laser processing parameters such as laser power, frequency and laser-mater interaction time. This method provides an insight for fabrication of functional surface.
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Jiang Li, Jiang Li, Wenjun Wang, Wenjun Wang, Xuesong Mei, Xuesong Mei, Aifei Pan, Aifei Pan, } "Fabrication of microstructures by rear-side picosecond laser irradiation of two-layer PMMA ", Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 106832U (17 May 2018); doi: 10.1117/12.2306705; https://doi.org/10.1117/12.2306705

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