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° for 205 nm sample thickness are derived.
© 2010 Optical Society of America
Original Manuscript: January 21, 2010
Revised Manuscript: March 24, 2010
Manuscript Accepted: March 31, 2010
Published: May 6, 2010
M. Decker, R. Zhao, C. M. Soukoulis, S. Linden, and M. Wegener, "Twisted split-ring-resonator photonic metamaterial with huge optical activity," Opt. Lett. 35, 1593-1595 (2010)