title: Properties of plasmonic arrays produced by pulsed-laser nanostructuring of thin Au films.
abstract: A brief description of research advances in the area of short-pulse-laser nanostructuring of thin Au films is followed by examples of experimental data and a discussion of our results on the characterization of structural and optical properties of gold nanostructures. These consist of partially spherical or spheroidal nanoparticles (NPs) which have a size distribution (80 ± 42 nm) and self-organization characterized by a short-distance order (length scale ≈140 nm). For the NP shapes produced, an observably broader tuning range (of about 150 nm) of the surface plasmon resonance (SPR) band is obtained by renewal thin film deposition and laser annealing of the NP array. Despite the broadened SPR bands, which indicate damping confirmed by short dephasing times not exceeding 4 fs, the self-organized Au NP structures reveal quite a strong enhancement of the optical signal. This was consistent with the near-field modeling and micro-Raman measurements as well as a test of the electrochemical sensing capability.
authors.affiliation: Centre for Plasma and Laser Engineering, The Szewalski Institute, Polish Academy of Sciences, 14 Fiszera St., 80-231 Gdańsk, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Grochowska
authors.affiliation: Centre for Plasma and Laser Engineering, The Szewalski Institute, Polish Academy of Sciences, 14 Fiszera St., 80-231 Gdańsk, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Siuzdak
authors.affiliation: Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Shousse, 1784 Sofia, Bulgaria.
authors.forename: Peter A
authors.initials: PA
authors.lastname: Atanasov
authors.affiliation: Chemistry of Interaction Plasma Surface (ChiPS), University of Mons, Rue du Parc 20, B-7000 Mons, Belgium.
authors.forename: Carla
authors.initials: C
authors.lastname: Bittencourt
authors.affiliation: Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Shousse, 1784 Sofia, Bulgaria.
authors.forename: Anna
authors.initials: A
authors.lastname: Dikovska
authors.affiliation: Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Shousse, 1784 Sofia, Bulgaria.
authors.forename: Nikolay N
authors.initials: NN
authors.lastname: Nedyalkov
authors.affiliation: Centre for Plasma and Laser Engineering, The Szewalski Institute, Polish Academy of Sciences, 14 Fiszera St., 80-231 Gdańsk, Poland.
authors.forename: Gerard
authors.initials: G
authors.lastname: Śliwiński
keywords: Au nanostructures; laser dewetting; laser nanostructuring; plasmonic enhancement; self-organization