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

Nagyné Szokol, Ágnes and Kámán, Judit and Holomb, Roman and Rigó, István and Aladi, Márk and Kedves, Miklós and Ráczkevi, Béla and Rácz, Péter and Bonyár, Attila and Borók, Alexandra and Zangana, Shereen and Szalóki, Melinda and Papp, István and Galbács, Gábor and Biró, Tamás Sándor and Csernai, László Pál and Kroó, Norbert and Veres, Miklós (2025) Morphology studies on craters created by femtosecond laser irradiation in UDMA polymer targets embedded with plasmonic gold nanorods. EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS. ISSN 1951-6355

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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 1.5·10 17 W/cm 2 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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