Realizing Deep-Subwavelength Negative-Index Waveguiding by a Single-Side Conformal Surface Plasmons

In this work, we introduce a novel route for achieving negative group velocity waveguiding at deep subwavelength scales. Our scheme is based on the strong electromagnetic coupling within a single side conformal surface plasmon structures. Simulation results show that the single side conformal surface plasmon system can be geometrically tailored to yield negative index dispersion. These results can assist in the development of ultrathin surface circuitry and represent a further step within the general endeavor of radiation control for the microwave and terahertz regimes.