Ion-beam assisted laser fabrication of sensing plasmonic nanostructures

• DOI: 10.1038/srep19410
• Publication Date: 2016-01-18T11:51:56Z
• Authors: Aleksandr Kuchmizhak; Stanislav Gurbatov; Oleg Vitrik; Yuri Kulchin; Valentin Milichko; Sergey Makarov; Sergey Kudryashov
• Keywords: Nanorod; Nanosecond

Abstract Simple high-performance, two-stage hybrid technique was developed for fabrication of different plasmonic nanostructures, including nanorods, nanorings, as well more complex structures on glass substrates. In this technique, a thin noble-metal film dielectric substrate is irradiated by single tightly focused nanosecond laser pulse and then the modified region slowly polished an accelerated argon ion (Ar + ) beam. As result, each locally modifies initial metal through initiation fast melting subsequent hydrodynamic processes, while following Ar -ion polishing removes rest film, revealing hidden topography features fabricating separate substrate. We demonstrate that shape lateral size resulting functional nanostructures depend energy thickness, enables to vary height nanostructures. Plasmonic properties fabricated were characterized dark-field micro-spectroscopy, Raman photoluminescence measurements performed nanofeatures, supporting numerical calculations related electromagnetic near-fields Purcell factors. The simple represents new step towards direct large-scale laser-induced highly ordered arrays