We examine the potential of ultra-thin metallic layers for broadband wave-impedance matching in the terahertz frequency range. The metallic layer is modeled using Fresnel formulae for stratified optical medium. Experimental data for chromium and indium- tin- oxide layers, measured using time- domain terahertz spectroscopy over the frequency range 0.4 - 4.5 THz, are compared with theoretical results. (C) 2007 Optical Society of America.
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