Raman spectroscopic characterization of crater walls formed upon single-shot high-energy femtosecond laser irradiation of dimethacrylate polymer doped with plasmonic gold nanorods

Rigó, István and Kámán, Judit and Nagyné Szokol, Ágnes and Holomb, Roman and Bonyár, Attila and Szaloki, Melinda and Borók, Alexandra and Zangana, Shireen and Rácz, Péter and Aladi, Márk and Kedves, Miklós and Galbács, Gábor and Csernai, László Pál and Biró, Tamás Sándor and Kroó, Norbert and Veres, Miklós (2025) Raman spectroscopic characterization of crater walls formed upon single-shot high-energy femtosecond laser irradiation of dimethacrylate polymer doped with plasmonic gold nanorods. SCIENTIFIC REPORTS, 15 (1). No. 14469. ISSN 2045-2322

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Abstract

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 2000-2500cm-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. © 2025. The Author(s).

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