A versatile method to fabricate particle-in-cavity plasmonic nanostructures

摘要

We have developed a versatile method to fabricate gold particle-in-ring and magnetic particle-in-nanobowl plasmonic nano-structures, which are of great potential for the investigation of the surface enhanced Raman scattering spectroscopy and the magneto-optical effect, respectively.Noble metal-based plasmonic nanostructures manipulate and concentrate light in nanoscale regions that are much smaller than conventional optic components. When such nanostructures are illuminated with light, a collective oscillation of the quasi-free electrons called surface plasmons generates a strong optical resonance, consequently producing enhanced near fields in deep subwavelength scales that enable interesting applications, such as waveguides, biochemical sensors, and surface enhanced Raman scattering (SERS) spectroscopy.