The formation of periodic diffractive plasmonic nanostructures with implanted copper nanoparticles by local ion etching of silica glass

Abstract

Silica glass was subjected to a low-energy implantation with 40-keV Cu⁺ ions at a dose of 7.5 × 10¹⁶ ions/cm² and an ion-beam current density of 5 μA/cm² through a surface metal-wire mask with square holes of ∼40 μm. The formation of copper nanoparticles in the glass was determined from the occurrence of characteristic plasmon optical absorption and through the detection of particles using an atomic force micro- scope. The formation of periodic surface microstructures via the local etching of silica glass during implantation was observed using a scanning electron microscope. The operating efficiency of the diffractive optical plasmonic element based on silica glass microstructures with metallic copper nanoparticles was shown during its sounding by the emission of a helium-neon laser.