Twisted split-ring-resonator photonic metamaterial with huge optical activity.
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.
Decker
M
M
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
Zhao
R
R
Soukoulis
C M
CM
Linden
S
S
Wegener
M
M