Large-area 3D chiral plasmonic structures

Bettina Frank, Xinghui Yin, Martin Schäferling, Jun Zhao, Sven M. Hein, Paul V. Braun, Harald Giessen

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Pages (from-to)6321-6329
Number of pages9
JournalACS Nano
Volume7
Issue number7
DOIs
StatePublished - Jul 23 2013

Keywords

  • chirality
  • circular dichroism
  • dipole model
  • hole-mask colloidal nanolithography
  • large-area chiral gold nanostructures
  • plasmonics

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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