Plasmonic nanohelix metamaterials with tailorable giant circular dichroism

J. G. Gibbs, A. G. Mark, S. Eslami, P. Fischer

Research output: Contribution to journalArticlepeer-review

111 Scopus citations

Abstract

Plasmonic nanohelix arrays are shown to interact with electromagnetic fields in ways not typically seen with ordinary matter. Chiral metamaterials (CMMs) with feature sizes small with respect to the wavelength of visible light are a promising route to experimentally achieve such phenomena as negative refraction without the need for simultaneously negative ε and μ. Here we not only show that giant circular dichroism in the visible is achievable with hexagonally arranged plasmonic nanohelix arrays, but that we can precisely tune the optical activity via morphology and lattice spacing. The discrete dipole approximation is implemented to support experimental data.

Original languageEnglish (US)
Article number213101
JournalApplied Physics Letters
Volume103
Issue number21
DOIs
StatePublished - Nov 18 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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