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

Dincer F., KARAASLAN M., AKGÖL O., ÜNAL E., Sabah C.

OPTIK, vol.126, no.24, pp.4808-4812, 2015 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 126 Issue: 24
  • Publication Date: 2015
  • Doi Number: 10.1016/j.ijleo.2015.09.162
  • Journal Name: OPTIK
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4808-4812
  • Middle East Technical University Affiliated: Yes

Abstract

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.