Dynamic and tunable chiral metamaterials with wideband constant chirality over a certain frequency band

WOS: 000368650800005
We present numerically and experimentally a dynamic chiral metamaterial (MTM) that creates strong optical activity and circular dichroism. The proposed tunable structure has a very simple and more efficient configuration which introduces flexibility to adjust its EM properties. In addition, it gives a giant negative refractive index due to the high chirality. Our experimental results confirm the strong optical activity for a wide frequency range and agree with the simulation results. Moreover, the proposed chiral MTM provides a wideband and constant/flat chirality over a certain frequency band and thus it can be concluded that the developed chiral MTM based model offers a strong optical activity in terahertz, infrared and even in visible frequencies. (C) 2015 Elsevier GmbH. All rights reserved.
TUBITAK [113E290]; Turkish Academy of Sciences
M.K. acknowledges the support of TUBITAK under the Project Number of 113E290 and partial support of the Turkish Academy of Sciences. Also appreciated are the efforts of D. Zarifi for his valuable discussions.