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A planar Babinet-inverted dimer metamaterial in the THz frequency range. It was implemented using a new fabrication process allowing for large area (up to several cm2), freely suspended, flexible and very thin (2μm) metallic membranes. Its optical properties reveal anisotropic transmission with high optical activity. The fabrication method presented in this work has great potential for further use in the fabrication of terahertz optics.

(Picture: M. Zalkovskij et al.10.1002/lpor.201300034, pp. 810–817, in this issue)