Figure 2From: Fabrication and characterization of well-aligned plasmonic nanopillars with ultrasmall separationsSEM image, optical image, and extinction spectra of Ag nanopillars. (a) Top-view SEM image of Ag nanopillars with 400-nm periodicity. (b) Optical image of nanopillars supported by a quartz substrate. (c) Measured extinction spectra for nanopillar arrays with varying periodicities.Back to article page