Raman spectroscopic characterization of crater walls formed upon single-shot high energy femtosecond laser irradiation of dimethacrylate polymer doped with plasmonic gold nanorods
arXiv (Cornell University)(2022)
摘要
The bonding configuration of the crater walls formed in urethane
dimethacrylate-based polymer doped with plasmonic gold nanorods upon
irradiation with a single-shot high-energy femtosecond laser pulse has been
studied by Raman spectroscopy. New Raman bands were detected in the 2000-2500
cm-1 region of the Raman spectrum the intensities of which showed strong
dependence on the concentration of the plasmonic nanoparticles and the energy
of the laser pulse. Based on model calculations of the Raman frequencies of the
polymer these peaks were attributed to carbon-deuterium and nitrogen-deuterium
vibrations. Their appearance might indicate the occurrence of nuclear reactions
in the polymer excited by the ultra-strong laser field amplified by the
plasmonic nanoparticles.
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关键词
laser,crater walls,raman,single-shot
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