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Two types of novel graphene-based components, namely, filters andelectro-optical switches in guided wave configuration are suggested andanalysed. The filters differ from the known ones with collinear orientation ofthe input and output waveguides by geometry and symmetry. The componentsconsist of a circular graphene disk and two nanoribbons oriented at $90^\circ$to each other in the plane of the graphene layer. The graphene elements areplaced on a dielectric substrate. We show that change in symmetry leads to adrastic change in the properties of the components. The physical principle ofthe devices is based on the dipole, quadrupole and hexapole resonances in thegraphene disk which define stop-band, pass-band and stop-band frequencycharacteristics, respectively. A combination of stop-band and pass-band filterproperties by shifing the electronic Fermi level allows one to design a switch.Numerical simulations show that the suggested components have very smalldimensions, good characteristics and provide a dynamic control of their centralfrequency via electrostatic gating.

Tunable THz and infrared plasmonic filter and switches based on circular graphene resonator with 90{\deg} bending of output port