High-Density 2D Homo- and Hetero- Plasmonic Dimers with Universal Sub-10-nm Gaps

High-Density 2D Homo- and Hetero- Plasmonic Dimers with Universal Sub-10-nm Gaps - Fabrication of high-density plasmonic dimers on a large (wafer) scale is crucial for applications in surface-enhanced spectroscopy, bio- and molecular sensing, and optoelectronics. Here, we present an experimental approach based on nanoimprint lithography and shadow evaporation that allows for the fabrication of high-density, large-scale homo- (Au–Au and Ag–Ag) and hetero- (Au–Ag) dimer substrates with precise and