How can we obtain plasmonic gold parts on nanostructures?

Abstract

The importance of nanostructures are increasing as the recent development of biological and photonic research field. Especially, the metal nanostructure, that has fluent free electrons, is a key structure for the upcoming research field such as metamaterials. This paper introduce two metal nanostructures fabricated using spherical colloidal particles: metal nanocups, and its quadrangle structures. We set three processes 1) fabrication of two-dimensional (2D) colloidal crystal composed of dielectric spherical particles (200-500 nm dia.), 2) metal coating on the crystal, and 3) uncoupling the coated metal from/with the dielectric materials. The optical characteristics of the metal nanostructures were also examined.