Capacity and Energy Efficiency of TeraHertz Surface Wave Interconnects

The potential of geometrically induced terahertz surface wave technology for communications can only be realized if communication links based on them are studied and benchmarked. The frequency-dependent transmission characteristics of interconnects based on three different archetypal textured surfaces (namely, gratings, dominos, nails) are analyzed numerically and the impact of the geometry and realistic surface roughness on the maximum capacity and energy efficiency is quantified. Unlike conventional hollow waveguides, the analysis shows that the capacity of uncoated corrugated surfaces is limited by loss and not dispersion. This work provides the guidelines for the design of terahertz surface wave interconnects. TeraHertz surface-wave-mediated communications are proposed for high-density and high-bandwidth interconnects. The dispersion and attenuation of THz surface waves could jeopardize such an approach. Herein, the capacity and energy efficiency metrics of three different archetypal textured surfaces (namely, gratings, dominos, nails) are reported and a simple methodology to find the system limits of THz surface-wave-mediated communications is provided.image (c) 2023 WILEY-VCH GmbH