A novel terahertz power meter using metamaterial-inspired thin-film absorber

A novel power meter operating from 0.1 to 0.2 THz is presented. The power meter has utilized a thin-film metamaterial inspired absorbing layer. This absorber has the desired characteristics such as ultra-wide bandwidth and strong absorption. In a bolometer-like measurement setup, it functions as a wideband high-responsivity THz detector. The absorbing layer consists of a low loss thin dielectric membrane onto which a two-dimensionally periodic, thin metallic layers is patterned. The measured absorption coefficient is above 0.75 at 220GHz range.