We present the first optical study of large-area random arrays of crescent-shaped nanoholes. The crescent-shaped nanohole antennae, fabricated using wafer-scale nanosphere lithography, provide a complement to crescent-shaped nanostructures, called nanocrescents, which have been established as powerful plasmonic biosensors. With both systematic experimental and computational analysis, we characterize the optical properties of crescent-shaped nanohole antennae and demonstrate tunability of their optical response by varying all key geometric parameters. Crescent-shaped nanoholes have reproducible sub-10-nm tips and are sharper than corresponding nanocrescents, resulting in higher local field enhancement, which is predicted to be |E|/|E(0)| = 1500. In addition, the crescent-shaped nanohole hole-based geometry offers increased integratability and the potential to nanoconfine analyte in "hot-spot" regions, increasing biomolecular sensitivity and allowing localized nanoscale optical control of biological functions.
No takes yet. Share an insight, caveat, or question.
Wu et al. (2009) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: