Giant rotary power of a fishnet-like metamaterial

S.X. Wang , F. Garet (1) , Eric Lheurette (2) , M. Astic (1) , J.L. Coutaz (1) , D. Lippens

1 IMEP-LAHC - Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520

We show experimentally and numerically that cholesteric-type metal-dielectric structures, made of twisted sub-wavelength hole elliptical–shaped arrays, exhibit strong optical activity and circular dichroism. The experimental demonstration is carried out with terahertz time-domain spectroscopy measurements on a three layered structure operating around 0.5 THz, leading to a rotary power as high as 1000◦/wavelength. The contribution of the chirality factor (κ), permittivity (ε), and permeability (μ) is discussed after the retrieval of effective parameters from the complex scattering ones

Domains: Optics / Photonic

S.X. Wang, F. Garet, Eric Lheurette, M. Astic, J.L. Coutaz, et al.. Giant rotary power of a fishnet-like metamaterial. APL Materials, 2013, 1, pp.032116-1-6. ⟨10.1063/1.4821627⟩. ⟨hal-00871905⟩