[15a-P3-1~13] 3.7 Laser processing

[15a-P3-9] Femtosecond laser multi-photon reduction in plasmonic nanoparticle dispersed solution

〇Kan Umetsu¹, Genki Ishimaru², Hiroaki Nishiyama¹ (1.Gad. Yamagata Univ., 2.Yamagata Univ.)

Keywords:femtosecond laser, multi-photon reduction, gold nanoparticle

Gold nanoparticles enhanced femtosecond laser multi-photon reduction in AgNO₃ solution. In AgNO₃ solution doped with Au nanoparticles, which have plasmonic peak near 780 nm in H₂O, threshold laser power for laser precipitation was markedly suppressed. In addition, spatial resolution was also improved to easily obtain line widths below diffraction-limit. In presentation, we also report dependence of Au nanoparticle concentration on precipitation behaviors.