title: Twisted split-ring-resonator photonic metamaterial with huge optical activity.
abstract: Coupled split-ring-resonator metamaterials have previously been shown to exhibit large coupling effects, which are a prerequisite for obtaining large effective optical activity. By a suitable lateral arrangement of these building blocks, we completely eliminate linear birefringence and obtain pure optical activity and connected circular optical dichroism. Experiments around a 100 THz frequency and corresponding modeling are in good agreement. Rotation angles of about 30 degrees for 205 nm sample thickness are derived.
authors.affiliation: Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute ofTechnology (KIT), D-76128 Karlsruhe, Germany. manuel.decker@physik.uni-karlsruhe.de
authors.forename: M
authors.initials: M
authors.lastname: Decker
authors.forename: R
authors.initials: R
authors.lastname: Zhao
authors.forename: C M
authors.initials: CM
authors.lastname: Soukoulis
authors.forename: S
authors.initials: S
authors.lastname: Linden
authors.forename: M
authors.initials: M
authors.lastname: Wegener