Composite THz materials using aligned metallic and semiconductor microwires, experiments and interpretation

• DOI: 10.1364/oe.18.024632
• Publication Date: 2010-11-10T18:44:21Z
• Authors: Anna Mazhorova; Jian Feng Gu; Alexandre Dupuis; Marco Peccianti; Ozaki Tsuneyuki; Roberto Morandotti; Hiroaki Minamide; Ming Tang; Yuye Wang; Hiromasa Ito; Maksim Skorobogatiy
• Keywords: 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; Physics - Optics; Optics (physics.optics)

We report fabrication method and THz characterization of composite films containing either aligned metallic (tin alloy) microwires or chalcogenide As2Se3 microwires. The microwire arrays are made by stack-and-draw fiber technique using multi-step co-drawing low-melting-temperature metals semiconductor glasses together with polymers. Fibers then stacked pressed into films. Transmission through metamaterial is studied in the whole range (0.1-20 THz) a combination FTIR TDS. Metal metamaterials found to have strong polarizing properties, while materials polarization independent could designable high refractive index. Using transfer matrix theory, we show how retrieve complex dependent index Finally, study challenges sub-micrometer wires repeated process comparing samples 2, 3 4 consecutive drawings. When alloys observe phase separation effects nano-grids formation on small wires.