Morphology studies on craters created by femtosecond laser irradiation in UDMA polymer targets embedded with plasmonic gold nanorods

• DOI: 10.1140/epjs/s11734-025-01599-8
• Publication Date: 2025-04-05T11:05:33Z
• Authors: Ágnes Nagyné Szokol; Judit Kámán; Roman Holomb; István Rigó; Márk Aladi; Miklós Kedves; Béla Ráczkevi; Péter Rácz; Attila Bonyár; Alexandra Borók; Shereen Zangana; Melinda Szalóki; István Papp; Gábor Galbács; Tamás S. Biró; László P. Csernai; Norbert Kroó; Miklós Veres
• Keywords: Nanorod

Abstract The effect of embedded plasmonic gold nanoparticles on the crater morphology was studied in 160 µm-thick UDMA–TEGDMA copolymer films irradiated by femtosecond single pulses of a Ti:Sa laser. The plasmonic absorption of the embedded gold nanorods had a resonance at the wavelength of the laser. It was observed that by increasing the laser intensity the diameter of the craters decreased, while the depth of the craters increased. In addition, the crater depths were significantly higher in the presence of gold nanorods. A threshold intensity of 1.5·1017 W/cm2 has been determined, above which a doubled roughness and sevenfold increased crater volume was observed in the polymer containing gold nanorods.

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