Drawn metamaterials with plasmonic response at terahertz frequencies

Abstract

The influences of substrate and metal properties on the magnetic response of metamaterials at terahertz region J. Appl. Phys.Electromagnetic metamaterials attract much attention since they can be engineered to exhibit optical properties not found in nature. Their fabrication, however, is challenging, especially in volume. We introduce drawing as a means of fabricating metamaterials, thus demonstrating a terahertz metamaterial. We codraw polymethyl-methacrylate and indium, producing several meters of metamaterial with wire diameters down to ϳ10 m, and lattice constants of ϳ100 m. We experimentally characterize the transmission properties of different samples, observing high-pass filtering between 0.3-0.4 THz, in good agreement with simulations.

Fabricating Metamaterials Using the Fiber Drawing Method

“…After Ref. 8 . (iii) Simulated transmittance for an array of the metamaterial fiber shown in Figure 3, using the same methods and optical parameters presented in Ref.…”

“…(iii) Simulated transmittance for an array of the metamaterial fiber shown in Figure 3, using the same methods and optical parameters presented in Ref. 8 . Note that in this case the fiber would exhibit a plasma frequency around 0.6 THz.…”

“…However, metamaterials operating at optical, mid-infrared and terahertz frequencies are conventionally made using nano-and micro-fabrication techniques that are expensive and produce samples that are at most a few centimetres in size [6][7] . Here we present a fabrication method to produce hundreds of meters of metal wire metamaterials in fiber form, which exhibit a terahertz plasmonic response 8 . We combine the stack-and-draw technique used to produce microstructured polymer optical fiber 9 with the Taylor-wire process 10 , using indium wires inside polymethylmethacrylate (PMMA) tubes.…”

A prism based magnifying hyperlens with broad-band imaging

“…6 At THz frequencies Tuniz et al, 13 experimentally demonstrated both magnifying and non-magnifying hyperlenses by fabricating a WM with the fiber drawing method. 14 The magnifying hyperlens was produced using a tapered section of the fiber that supports propagation of near-field features below the diffraction a) Electronic mail: samiul.habib@sydney.edu.au limit. However, fabrication of such larger tapers is also challenging.…”

“…In the simulations the refractive index of Zeonex is taken to be 1.52. 14 The WM is oriented along the z-axis, and the objects to be imaged are placed in the xy-plane with the features to be resolved aligned on the x axis, see Fig. 1.…”