  In this work, a plasmonic right-angled waveguide bend and divider are
proposed. Using the Transformation Optics (TO) approach the transformation
media of a bend and a T-shaped divider are obtained. Such media with continuous
refractive index are realized with the help of graphene in the terahertz
frequency range, key to effectively guiding the surface plasmon polariton (SPP)
propagation on the 90 degree curves. Components with such capability are
promising for THz device applications.
