Dynamic and tunable chiral metamaterials with wideband constant chirality over a certain frequency band
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KünyeDincer, F., Karaaslan, M., Akgol, O., Unal, E., Sabah, C. (2015). Dynamic and tunable chiral metamaterials with wideband constant chirality over a certain frequency band. Optik, 126 (24), pp. 4808-4812. https://doi.org/10.1016/j.ijleo.2015.09.162
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.