Broadband terahertz plasmonic multiplexers

In this work, we demonstrate a metal-wire-based plasmonic signal processor, which can simultaneously act as a broadband terahertz polarization-division multiplexer and as a novel platform to realize the independent manipulation of polarization-division multiplexed terahertz signals. Such a device opens up new exciting perspectives for exploiting the polarization degree of freedom and ultimately boosting the capacity and spectral efficiency of future terahertz networks.