Micro-ellipsometry of square lattices of plasmonic nanodiscs on dielectric substrates and in metal-insulator-metal configurations

Abstract

This article demonstrates the capability of imaging micro-ellipsometry in the investigation of ordered plasmonic nanostructures on different substrates. The difference of the resonances of similar square lattices of plasmonic nanoparticles on a dielectric substrate and in a metal-insulator-metal configuration is analyzed. The influence of the surface plasmon on interparticle interactions becomes clearly apparent. Comparison of the obtained data with dark-field scattering spectra proves the consistency of the measured results as well as the complementary information received from both methods.

Keywords

• Micro-ellipsometry
• Nanodiscs
• Square lattices
• Dark-field spectra
• Metal-insulator-metal structures