Investigations are performed to explore high-repetition-rate femtosecond laser ablation effects on the physical and chemical properties of poly（methyl methacrylate） （PMMA）. A scanning electron microscopy （SEM） i...Investigations are performed to explore high-repetition-rate femtosecond laser ablation effects on the physical and chemical properties of poly（methyl methacrylate） （PMMA）. A scanning electron microscopy （SEM） is used to characterize the morphology change in the laser-ablated regions. The infrared and Raman spectroscopy reveals that the fundamental structure of the PMMA is altered after laser ablation. We demonstrate the cumulative heating is much greater during high-repetition-rate femtosecond laser ablation, supporting a photothermal depolymerization mechanism during the ablation process.展开更多
基金supported by the National Natural Science Foundation of China(NSFC)(Grant Nos.61275131and 61322502)the National Basic Research Program of China(Grant No.2011CB808101)
文摘Investigations are performed to explore high-repetition-rate femtosecond laser ablation effects on the physical and chemical properties of poly（methyl methacrylate） （PMMA）. A scanning electron microscopy （SEM） is used to characterize the morphology change in the laser-ablated regions. The infrared and Raman spectroscopy reveals that the fundamental structure of the PMMA is altered after laser ablation. We demonstrate the cumulative heating is much greater during high-repetition-rate femtosecond laser ablation, supporting a photothermal depolymerization mechanism during the ablation process.
