We manufacture large-area plasmonic structures featuring 3-dimensional chirality by colloidal nanohole lithography. By varying the polar rotating speed of the samples during gold evaporation, we can fabricate spiral-type ramp nanostructures. The optical properties show chiroptical resonances in the 100 to 400 THz frequency region (750 to 3000 nm), with circular dichroism values of up to 13%. Our method offers a simple low-cost manufacturing method of cm 2-sized chiral plasmonic templates for chiroptical applications such as stereochemical enantiomer sensors.
- circular dichroism
- dipole model
- hole-mask colloidal nanolithography
- large-area chiral gold nanostructures
ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy(all)